Free backlink sites list: 1,964 places to get a link
A maintained list of 1,964 legitimate backlink sites: directories, profile creation sites, guest posting sites, launch platforms, registries and marketplaces. 1,628 are free or have a free tier, 44 usually give a dofollow link, and 781 have an estimated DA of 70 or more. Every row shows authority, link type, cost and effort, and links straight to the submit page.
- 1,964
- Opportunities
- 1,628
- Free or freemium
- 781
- Est. DA 70+
- 208
- Quick wins
All filters1
The table is wider than the screen — swipe it sideways for cost, effort and the preparation notes.
| # | Impact (sorted) | Site — sort by this | Est. DA — sort by this | Link | Domain | Type | Cost | Effort — sort by this | Priority | Status | What to prepare | Rules / caveat | Checked | Actions |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 301 | 84 | Open Collective | 85 | Nofollow | opencollective.com | Profiles and entities | Free | Moderate | High | Live, conditional | Create a genuine your tool collective, complete its public profile, and add the official website plus repository/social links. | Use only for a real community or open-source project; keep team, purpose and financial details accurate. | 2026-08-05 | Open Open Collective submit page (new tab)Open Collective details |
| 302 | 84 | Open Textbook Library | 85 | Link type unknown | open.umn.edu | Other opportunities | Free | Moderate | High | Verified live | Submit a complete, openly licensed privacy/digital-safety textbook already used in higher education. | Complete semester-length text; no CC-ND; must be used at multiple higher-ed institutions or backed by a higher-ed, scholarly or professional body. | 2026-08-05 — https://open.umn.edu/opentextbooks/textbooks/submit | Open Open Textbook Library submit page (new tab)Open Textbook Library details |
| 303 | 84 | OpenFuture AI | 40 | Link type unknown | openfuture.ai | AI tool directories | Free | Moderate | High | Verified live | Create an account and submit your tool or its qualifying AI tools. | Login required; tool must be live and accurately categorized. | https://openfuture.ai/submit-tool | Open OpenFuture AI submit page (new tab)OpenFuture AI details |
| 304 | 84 | OpenLearn Create | 90 | Link type unknown | open.edu | Other opportunities | Free | Moderate | High | Verified live | Publish a free mini-course on privacy, redaction, scam detection, or accessibility with genuine your tool exercises in the curriculum. | Publication is checked; clear all rights, meet accessibility requirements, use appropriate licensing, and avoid direct marketing. | 2026-08-05 — https://www.open.edu/openlearncreate/local/ocwcreatecourse/gettingstarted.php | Open OpenLearn Create submit page (new tab)OpenLearn Create details |
| 305 | 84 | OpenML | 60 | Link type unknown | openml.org | Publishing platforms | Free | Moderate | High | Verified live | Publish a documented, de-identified ML-ready benchmark such as labelled phishing, homograph, or accessibility test cases with provenance and an open license. | The upload must be a legitimate machine-learning dataset, include name, description, and license, contain no sensitive data, and pass OpenML's automated verification before activation. | 2026-08-03 | Open OpenML submit page (new tab)OpenML details |
| 306 | 84 | OpenSourceFest | — | Link type unknown | opensourcefest.org | Developer registries | Free | Moderate | High | Live, conditional | Submit a maintained your tool open-source project through Submit a Project. | Editors review license, activity and quality; proprietary web-only tools do not qualify. | 2026-08-05 | Open OpenSourceFest submit page (new tab)OpenSourceFest details |
| 307 | 84 | OpenSSF Scorecard | 40 | Link type unknown | scorecard.dev | Developer registries | Free | Moderate | High | Live, conditional | Run Scorecard on a public your tool component, enable published results, remediate checks, and link the public viewer from repository documentation. | Public repository and admin rights are required; scores are heuristic and website exposure is indirect through accurate repository metadata. | 2026-08-05 official Scorecard site and OpenSSF repository | Open OpenSSF Scorecard submit page (new tab)OpenSSF Scorecard details |
| 308 | 84 | openSUSE Build Service | 70 | Link type unknown | build.opensuse.org | Developer registries | Free | Moderate | High | Verified live | Create a public OBS project and package that builds your tool for supported Linux distributions with upstream links. | Requires valid build recipes, licenses and maintained packages; project pages are for software distribution, not promotion alone. | Official OBS user guide and live service checked 2026-07-30 | Open openSUSE Build Service submit page (new tab)openSUSE Build Service details |
| 309 | 84 | Openwall oss-security | 75 | Link type unknown | openwall.com | Software directories | Free | Moderate | High | Live, conditional | Post only a self-contained initial announcement of a substantial open-source defensive tool, a major update, or a properly coordinated OSS vulnerability disclosure. | The list is for OSS security, not promotion. Tool posts should be rare, technically detailed, and especially useful for improving other open-source software; minor updates and cross-posting are discouraged. | 2026-08-03 | Open Openwall oss-security submit page (new tab)Openwall oss-security details |
| 310 | 84 | Payhip | 75 | Link type unknown | payhip.com | Other opportunities | Free | Moderate | High | Verified live | Publish a genuinely useful free privacy checklist, redaction template, or safety workbook that complements your tool and has standalone value. | The resource must be substantive and rights-cleared; disclose AltFTool links and avoid a one-page promotional download. | Official Payhip pricing and publishing path checked 2026-08-07 | Open Payhip submit page (new tab)Payhip details |
| 311 | 84 | PeerSpot | 70 | Link type unknown | peerspot.com | Software directories | Free | Moderate | High | Live, conditional | Contact PeerSpot with your tool enterprise use cases and real-customer evidence to request inclusion. | PeerSpot says listings are not pay-to-play, but the product must be enterprise-class and have real customers; never manufacture reviews. | 2026-08-03 | Open PeerSpot submit page (new tab)PeerSpot details |
| 312 | 84 | Podcast Addict | 70 | Link type unknown | podcastaddict.com | Other opportunities | Free | Moderate | High | Live, conditional | Submit a valid public your tool podcast feed and keep website and episode-link metadata accurate. | Feed must contain playable genuine episodes; directory review may take time. | 2026-08-04 | Open Podcast Addict submit page (new tab)Podcast Addict details |
| 313 | 84 | Podchaser | 75 | Nofollow | podchaser.com | Profiles and entities | Free | Moderate | High | Live, conditional | Claim a genuine your tool show, verify ownership, and complete its official website and creator details. | Ownership verification by feed email or token is required; never create a fake podcast for links. | 2026-08-04 | Open Podchaser submit page (new tab)Podchaser details |
| 314 | 84 | Privacy Guides | 70 | Link type unknown | privacyguides.org | Software directories | Free | Moderate | High | Not submitted | Submit one mature privacy tool, disclose ownership, publish its exact threat model and limitations, and engage transparently with the community review. | Developers must disclose affiliation and explain the privacy advantage and threat model; sensitive-data tools need a security white paper and audit status. Open source, active development, usability, cross-platform support, and strong documentation are preferred. | 2026-08-03 | Open Privacy Guides submit page (new tab)Privacy Guides details |
| 315 | 84 | ProductWing | — | Link type unknown | productwing.com | Launch platforms | Free | Moderate | High | Needs checking | Launch your tool with a unique tagline, screenshots and founder profile linking to your tool. | Use original launch copy; no vote manipulation; review or queue may apply. Dofollow is reported but recheck after approval. | 2026-07-30 • https://www.submission.directory/site/productwing | Open ProductWing submit page (new tab)ProductWing details |
| 316 | 84 | protocols.io | 75 | Link type unknown | protocols.io | Developer registries | Free | Moderate | High | Live, conditional | Publish a reproducible your tool testing, privacy-analysis or accessibility-evaluation method and cite relevant project resources. | Submissions must contribute genuine experimental or computational research methods; non-scientific promotion may be removed. | 2026-08-04 | Open protocols.io submit page (new tab)protocols.io details |
| 317 | 84 | QGIS Official Plugin Repository | 80 | Link type unknown | qgis.org | Marketplaces and app stores | Free | Moderate | High | Verified live | Build a QGIS plugin that checks selected layers or exports for sensitive coordinates and metadata, then creates a safer copy. | An OSGeo account, valid package and metadata, unique name, usable documentation, and staff approval are required. | Official QGIS plugin release documentation checked 2026-08-07 | Open QGIS Official Plugin Repository submit page (new tab)QGIS Official Plugin Repository details |
| 318 | 84 | Quarto Extensions | 65 | Link type unknown | quarto.org | Marketplaces and app stores | Free | Moderate | High | Verified live | Create a public Quarto extension for privacy, accessibility, or document checks with documentation, examples, and a license, then propose it for listing. | Must be a working extension; inclusion is manually curated and promotional links alone are insufficient. | Official Quarto extension and listing documentation checked 2026-08-05 | Open Quarto Extensions submit page (new tab)Quarto Extensions details |
| 319 | 84 | Railway Templates | 70 | Link type unknown | railway.com | Marketplaces and app stores | Free | Moderate | High | Live, conditional | Publish a maintained your tool open-source service template with safe variables, health checks, documentation and a demo. | Must be a reusable deployable template; never include secrets and provide active maintenance. | 2026-08-04 | Open Railway Templates submit page (new tab)Railway Templates details |
| 320 | 84 | Raindrop.io Public Pages | 70 | Nofollow | raindrop.io | Publishing platforms | Free | Moderate | High | Verified live | Publish a carefully annotated collection of trustworthy privacy, accessibility, and safety resources, including only your tool pages that genuinely fit each section. | Email verification is required and each collection must be explicitly made public; official help says public pages may be indexed. Avoid self-only or mass-imported link collections, add independent sources and honest notes, and disclose AltFTool ownership. Pages are self-published UGC with no ranking or followed-link guarantee. | 2026-08-03 | Open Raindrop.io Public Pages submit page (new tab)Raindrop.io Public Pages details |
| 321 | 84 | Redmine Plugin Directory | 75 | Link type unknown | redmine.org | Marketplaces and app stores | Free | Moderate | High | Not submitted | Build a maintained Redmine plugin that creates privacy or security audit tasks, document supported versions, then register it under an authenticated developer account. | Only register a functioning plugin you maintain, with accurate compatibility and support details; moderation and link treatment are not guaranteed. | 2026-08-03 | Open Redmine Plugin Directory submit page (new tab)Redmine Plugin Directory details |
| 322 | 84 | REUSE API | 50 | Link type unknown | reuse.software | Other opportunities | Free | Moderate | High | Live, conditional | Make a real public your tool repository REUSE-compliant, register its Git URL, and link the resulting compliance page from project docs. | Public maintained repository only; main branch is checked and email confirmation is required; fix findings rather than using a decorative badge. | 2026-08-05 official REUSE API and register pages | Open REUSE API submit page (new tab)REUSE API details |
| 323 | 84 | RubyGems.org | 80 | Nofollow | rubygems.org | Developer registries | Free | Moderate | High | Verified live | Package a legitimate your tool Ruby client or utility and add homepage and source metadata before pushing the gem. | Use a unique gem name, valid gemspec and maintained code; never publish a placeholder package. | Official RubyGems guide checked 2026-07-30 | Open RubyGems.org submit page (new tab)RubyGems.org details |
| 324 | 84 | Runtipi App Store | 35 | Link type unknown | runtipi.io | Marketplaces and app stores | Free | Moderate | High | Verified live | Create and locally test an your tool Runtipi app with config, Compose metadata, safe secrets, screenshots, documentation, backups, and update behavior, then submit it. | Must follow current app schema, support stated architectures, avoid latest image tags, pass validation, and remain maintained. | Official Runtipi app creation and default-store documentation checked 2026-08-05 | Open Runtipi App Store submit page (new tab)Runtipi App Store details |
| 325 | 84 | Sanity Exchange | 75 | Link type unknown | sanity.io | Marketplaces and app stores | Free | Moderate | High | Verified live | Build an your tool Sanity Studio plugin, publish it to npm, and submit it to Sanity Exchange with documentation and support links. | Must be a reusable external-use Studio plugin with correct package metadata and documentation and follow the current Exchange flow. | Official Sanity Studio plugin documentation checked 2026-08-07 | Open Sanity Exchange submit page (new tab)Sanity Exchange details |
| 326 | 84 | Scalar | 50 | Link type unknown | scalar.usc.edu | Other opportunities | Free | Moderate | High | Verified live | Publish a coherent multimedia field guide on privacy, scam evidence, or accessible documents with cited your tool demonstrations. | Create a real scholarly or educational book, make it public, and use only owned or properly licensed media. | 2026-08-05 — https://scalar.usc.edu/works/guide2/creating-an-account | Open Scalar submit page (new tab)Scalar details |
| 327 | 84 | ShinyLaunch | — | Link type unknown | shinylaunch.com | Launch platforms | Free | Moderate | High | Needs checking | Launch your tool with a unique tagline, screenshots and founder profile linking to your tool. | Use original launch copy; no vote manipulation; review or queue may apply. Listing link is currently reported nofollow. | 2026-07-30 • https://www.submission.directory/site/shinylaunch | Open ShinyLaunch submit page (new tab)ShinyLaunch details |
| 328 | 84 | Slant | 75 | Nofollow | slant.co | Communities and forums | Free | Moderate | High | Needs checking | Find an existing question where a specific your tool utility is a genuine option, add it accurately, and document balanced pros and cons. | Never create fake recommendations or coordinate votes; add only a relevant product and disclose the relationship when participating. | 2026-08-03 | Open Slant submit page (new tab)Slant details |
| 329 | 84 | Snakemake Workflow Catalog | 50 | Link type unknown | snakemake.github.io | Other opportunities | Free | Moderate | High | Verified live | Publish a public reproducible privacy-safe research workflow with a Snakefile, README, configuration, catalog metadata, and tests. | Public GitHub repository and Snakemake workflow structure are required; standardized layout strengthens catalog integration. | Official Snakemake Workflow Catalog guide checked 2026-08-05 | Open Snakemake Workflow Catalog submit page (new tab)Snakemake Workflow Catalog details |
| 330 | 84 | Snap Store | 85 | Link type unknown | snapcraft.io | Marketplaces and app stores | Free | Moderate | High | Verified live | Ship an installable your tool Linux app or CLI as a snap with a complete store listing and website link. | Reserve the name, pass automated review and keep confinement, permissions and releases accurate. | Official Snapcraft docs checked 2026-07-30 | Open Snap Store submit page (new tab)Snap Store details |
| 331 | 84 | Softonic | 90 | Nofollow | softonic.com | Software directories | Free | Moderate | High | Needs checking | Submit your desktop or mobile app through their developer contact so it gets a download page. | Installers are malware-scanned; bundled adware is refused. | Added 2026-11-01 | Open Softonic submit page (new tab)Softonic details |
| 332 | 84 | Splunkbase | 90 | Link type unknown | splunk.com | Marketplaces and app stores | Free | Moderate | High | Live, conditional | Build a useful Splunk app or add-on for legitimate your tool security, audit, or operational data; package it with clear documentation, icons, screenshots, release metadata, and support details. | The package must pass structural, antivirus, security, and AppInspect checks plus admin review. Choose hosted versus external directory listing carefully because the hosting mode cannot be changed after publication; keep the app maintained and accurately supported. | 2026-08-03 | Open Splunkbase submit page (new tab)Splunkbase details |
| 333 | 84 | Spotify for Creators | 95 | Nofollow | creators.spotify.com | Other opportunities | Free | Moderate | High | Live, conditional | Host or claim a genuine your tool show, verify the RSS email, and publish accurate episode notes with relevant HTTPS resources. | Ownership verification is required; links must support real episode content and display behavior varies by app. | 2026-08-05 | Open Spotify for Creators submit page (new tab)Spotify for Creators details |
| 334 | 84 | SpotSaaS | 30 | Link type unknown | spotsaas.com | Marketplaces and app stores | Free | Moderate | High | Verified live | Submit an accurate your tool profile with its strongest software category, live URL, features, pricing and logo. | Manual review can take up to two weeks; incomplete or misleading submissions are rejected, so describe only live functionality. | 2026-08-03 • https://www.spotsaas.com/get-listed | Open SpotSaaS submit page (new tab)SpotSaaS details |
| 335 | 84 | SSH Open Marketplace | 40 | Link type unknown | marketplace.sshopencloud.eu | Marketplaces and app stores | Free | Moderate | High | Verified live | Create a factual your tool tool, workflow, or tutorial entry that genuinely serves social-science or humanities researchers. | Requires concrete SSH research value, authorship, licence, useful supporting material, and marketplace moderation. | 2026-08-05 — https://marketplace.sshopencloud.eu/ | Open SSH Open Marketplace submit page (new tab)SSH Open Marketplace details |
| 336 | 84 | StackBlitz | 85 | Nofollow | stackblitz.com | Other opportunities | Free | Moderate | High | Verified live | Publish a working browser demo or starter that teaches an your tool integration, with accurate title, description and canonical documentation link. | Make the project genuinely reusable and public; links may be treated as user-generated and SEO value is not guaranteed. | 2026-08-03 | Open StackBlitz submit page (new tab)StackBlitz details |
| 337 | 84 | Start.me | 80 | Nofollow | start.me | Publishing platforms | Free | Moderate | High | Not submitted | Build a valuable public start page of privacy and productivity resources, then submit it to Community Pages after adding your tool selectively. | Community submission is reviewed, new accounts have a waiting period, and the page must be public and useful rather than self-promotional. | 2026-08-03 | Open Start.me submit page (new tab)Start.me details |
| 338 | 84 | Startup India | 75 | Link type unknown | startupindia.gov.in | Startup directories | Free | Moderate | High | Verified live | Apply only if the legal entity behind your tool meets DPIIT eligibility, innovation, age, and turnover conditions. | This is entity validation rather than a guaranteed public backlink; incorporation and eligibility evidence are mandatory. | https://www.startupindia.gov.in/content/sih/en/startupgov/startup_recognition_page.html | Open Startup India submit page (new tab)Startup India details |
| 339 | 84 | Startup List | — | Link type unknown | startup-list.org | Launch platforms | Free | Moderate | High | Not submitted | Create an account and submit your tool with positioning, category, logo and 3–6 accurate tags. | Account required; align listing promise with homepage; approval controls publication. | 2026-07-30 • https://www.startup-list.org/submit | Open Startup List submit page (new tab)Startup List details |
| 340 | 84 | Startup Tracker | 40 | Link type unknown | startuptracker.io | Startup directories | Free | Moderate | High | Not submitted | Create or claim your tool company profile and add its official URL, product summary, founders, location, and verified company facts. | Company data is crowdsourced and reviewed; provide complete, verifiable facts and avoid exaggerated claims. | 2026-08-03 | Open Startup Tracker submit page (new tab)Startup Tracker details |
| 341 | 84 | Statamic Marketplace | 60 | Link type unknown | statamic.dev | Marketplaces and app stores | Free | Moderate | High | Verified live | Build a useful Statamic/Laravel addon around an your tool workflow, publish it on Packagist and submit the product to the official marketplace. | Requires a real Composer addon, seller/product setup, accurate docs and ongoing PHP/Laravel compatibility; paid-addon economics differ and must not be pursued solely for a link. | 2026-08-05 | Open Statamic Marketplace submit page (new tab)Statamic Marketplace details |
| 342 | 84 | Store.app | — | Link type unknown | store.app | Marketplaces and app stores | Free | Moderate | High | Not submitted | Create a developer account, request access, verify ownership, and publish a complete app profile with screenshots and description. | Requires a functional web app and ownership verification; Store.app reviews developer access and submitted information. | 2026-08-03 | Open Store.app submit page (new tab)Store.app details |
| 343 | 84 | Storybook Integration Catalog | 75 | Link type unknown | storybook.js.org | Marketplaces and app stores | Free | Moderate | High | Verified live | Build a Storybook panel or preset that reports metadata, accessibility, broken-link or deployed-story audit findings through your tool, then publish it as an npm addon. | Requires a real distributable addon, README, preset entry and storybook-addon as the first keyword; support current Storybook and never transmit private story content without opt-in. | 2026-08-05 | Open Storybook Integration Catalog submit page (new tab)Storybook Integration Catalog details |
| 344 | 84 | Strapi Community Marketplace | 80 | Link type unknown | strapi.io | Marketplaces and app stores | Free | Moderate | High | Verified live | Build a useful your tool Strapi plugin and submit its package, repository, documentation, and your tool support URL. | Must be functional, MIT-licensed, publicly packaged and documented, and pass functional and security review; no offsite paywall. | Official Strapi community plugin submission page checked 2026-08-07 | Open Strapi Community Marketplace submit page (new tab)Strapi Community Marketplace details |
| 345 | 84 | Streamlit Community Cloud | 75 | Link type unknown | streamlit.io | Communities and forums | Free | Moderate | High | Verified live | Deploy an educational your tool data or AI demo from a public GitHub repository and include a useful link to the full tool or documentation. | The app must work independently, protect secrets and comply with resource limits; do not create a doorway page solely for a backlink. | 2026-08-03 | Open Streamlit Community Cloud submit page (new tab)Streamlit Community Cloud details |
| 346 | 84 | SupaHunt | — | Link type unknown | supahunt.com | Launch platforms | Free | Moderate | High | Verified live | Launch your tool with original copy, screenshots and maker details; use the free reviewed listing. | Human review applies; avoid coordinated voting, duplicate launch copy or unsupported claims. | 2026-08-03 | Open SupaHunt submit page (new tab)SupaHunt details |
| 347 | 84 | Super User | 80 | Nofollow | superuser.com | Communities and forums | Free | Moderate | High | Needs checking | Set up a profile with your site in the website field, then answer computer questions where your guide genuinely helps. | Self-promotion must be disclosed and relevant; answers that are mostly a link get deleted. | Added 2026-11-01 | Open Super User submit page (new tab)Super User details |
| 348 | 84 | SuperLaunch | — | Link type unknown | superlaunch.in | Launch platforms | Free | Moderate | High | Verified live | Submit a complete India-relevant product profile with accurate founder information, category, website and launch assets. | Submissions are reviewed before approval; use only genuine founder and company details and do not coordinate artificial upvotes. | 2026-08-03 • https://superlaunch.in/ | Open SuperLaunch submit page (new tab)SuperLaunch details |
| 349 | 84 | Swagger Studio | 75 | Nofollow | app.swaggerhub.com | Other opportunities | Free | Moderate | High | Live, conditional | Publish a real your tool OpenAPI definition publicly with an accurate description and external documentation URL. | API must be genuine and the spec valid; set visibility to public and publication status accurately, with no credentials in examples. | https://support.smartbear.com/swagger/studio/docs/en/manage-apis/publish-an-api.html | Open Swagger Studio submit page (new tab)Swagger Studio details |
| 350 | 84 | Swift Package Index | 55 | Link type unknown | swiftpackageindex.com | Developer registries | Free | Moderate | High | Verified live | Add a public Swift package with Package.swift, semantic-version tags, documentation and an your tool homepage link. | Repository must be public, use Swift 5 or newer and have a valid semantic-version release. | Official Swift Package Index submission page checked 2026-07-30 | Open Swift Package Index submit page (new tab)Swift Package Index details |
| 351 | 84 | The Dots | 55 | Link type unknown | the-dots.com | Profiles and entities | Free | Moderate | High | Verified live | Create the real designer/founder profile and add an original your tool product-design or accessibility project with collaborators, role, process, and official URL. | Publish only work the profile owner actually created and credit collaborators accurately; do not fabricate a team or engagement. Projects are community UGC and may be curated or moderated. External links, search visibility, timing, and rel/follow treatment are not guaranteed. | 2026-08-03 | Open The Dots submit page (new tab)The Dots details |
| 352 | 84 | Thunderbird Add-ons | 75 | Nofollow | addons.thunderbird.net | Marketplaces and app stores | Free | Moderate | High | Verified live | Build a legitimate Thunderbird MailExtension, complete its add-on page and submit it through the Developer Hub. | Must comply with Thunderbird technical, security, privacy, licensing and review policies. | Official Thunderbird add-on developer pages checked 2026-07-30 | Open Thunderbird Add-ons submit page (new tab)Thunderbird Add-ons details |
| 353 | 84 | TODO Group OSPO Landscape | 55 | Link type unknown | todogroup.org | Software directories | Free | Moderate | High | Live, conditional | Create a real your tool OSPO function or a tool that materially supports OSPO work, then contribute the logo and canonical URL by issue or pull request. | Adopters must meet the OSPO definition; tools must genuinely support governance, SBOM, compliance, security, documentation or community health. | 2026-08-05 official TODO Group landscape repository and documentation | Open TODO Group OSPO Landscape submit page (new tab)TODO Group OSPO Landscape details |
| 354 | 84 | Toolhunt | — | Link type unknown | toolhunt.dev | Software directories | Free | Moderate | High | Verified live | Email a complete your tool listing with a concise description, URL, tags, pricing, logo, screenshots and real features. | Publisher reviews submissions; supply accurate assets and avoid exaggerated claims. | 2026-08-04 | Open Toolhunt submit page (new tab)Toolhunt details |
| 355 | 84 | ToolJet Marketplace | 55 | Link type unknown | tooljet.ai | Marketplaces and app stores | Free | Moderate | High | Verified live | Create a functional your tool ToolJet plugin with clear documentation and tests, then submit it to the marketplace through the official contribution flow. | Must be a real maintained plugin, meet repository standards, pass review, and avoid a thin wrapper whose only purpose is promotion. | Official ToolJet Marketplace plugin documentation checked 2026-08-07 | Open ToolJet Marketplace submit page (new tab)ToolJet Marketplace details |
| 356 | 84 | Trustiner | — | Link type unknown | trustiner.com | Launch platforms | Free | Moderate | High | Needs checking | Launch your tool with a unique tagline, screenshots and founder profile linking to your tool. | Use original launch copy; no vote manipulation; review or queue may apply. Listing link is currently reported nofollow. | 2026-07-30 • https://www.submission.directory/site/trustiner | Open Trustiner submit page (new tab)Trustiner details |
| 357 | 84 | Twine | 60 | Link type unknown | twine.net | Design galleries | Free | Moderate | High | Verified live | Create a founder or developer portfolio and publish an your tool build case study with screenshots, process, outcomes, and the live project link. | The portfolio must represent genuine work and use original assets plus a substantive project description. | Official Twine portfolio guidance checked 2026-08-07 | Open Twine submit page (new tab)Twine details |
| 358 | 84 | Typst Universe | 60 | Link type unknown | typst.app | Software directories | Free | Moderate | High | Verified live | Build a reusable Typst privacy, accessibility, or document-checking package with a valid manifest, docs, examples, and tests, then submit it to the official packages repository. | Package must provide real reusable Typst functionality; namespace, versioning, documentation, licensing, and review rules apply. | Official Typst packages repository and Universe instructions checked 2026-08-05 | Open Typst Universe submit page (new tab)Typst Universe details |
| 359 | 84 | Umbrel App Store | 45 | Link type unknown | apps.umbrel.com | Marketplaces and app stores | Free | Moderate | High | Verified live | Package a self-hosted your tool privacy utility for umbrelOS, add required metadata and assets, test it on supported hardware, and submit the official app PR. | Must be a real containerized app; Docker images should be pinned, install flow tested, screenshots supplied, and review requirements satisfied. | Official Umbrel app repository submission guide checked 2026-08-05 | Open Umbrel App Store submit page (new tab)Umbrel App Store details |
| 360 | 84 | Unity Asset Store | 90 | Link type unknown | unity.com | Marketplaces and app stores | Free | Moderate | High | Verified live | Build a polished Unity editor utility or SDK for a relevant your tool service and submit it with demos, documentation and support details. | Publisher verification, technical validation, legal rights and marketplace review apply; do not repackage generic or unlicensed assets. | 2026-08-03 | Open Unity Asset Store submit page (new tab)Unity Asset Store details |
| 361 | 84 | Univ. of St Andrews online learning tools | — | Link type unknown | st-andrews.ac.uk | Publishing platforms | Free | Moderate | High | Needs checking | Submit the PDF tools and image tools as free teaching/learning utilities. | Edu domain with an explicit submit form; reviewed by staff. | Added 2026-11-01 | Open Univ. of St Andrews online learning tools submit page (new tab)Univ. of St Andrews online learning tools details |
| 362 | 84 | Uptodown | 80 | Nofollow | uptodown.com | Software directories | Free | Moderate | High | Needs checking | Register as a developer and upload your app or ask the team to list it. | Apps are scanned and checked for malware before publishing. | Added 2026-11-01 | Open Uptodown submit page (new tab)Uptodown details |
| 363 | 84 | Vercel Integrations Marketplace | 90 | Link type unknown | vercel.com | Marketplaces and app stores | Free | Moderate | High | Live, conditional | Build an your tool Vercel integration, distribute its page, gain adoption, then apply for Marketplace visibility. | Community integrations can use direct pages; Marketplace listing generally requires 500 active installs and review. | https://vercel.com/docs/integrations/create-integration | Open Vercel Integrations Marketplace submit page (new tab)Vercel Integrations Marketplace details |
| 364 | 84 | Wakelet | 80 | Nofollow | wakelet.com | Publishing platforms | Free | Moderate | High | Not submitted | Publish a well-organized privacy-toolkit collection containing authoritative resources plus selected your tool utilities. | Starter limits collections and items; avoid a collection made only of self-links and expect UGC or redirect handling. | 2026-08-03 | Open Wakelet submit page (new tab)Wakelet details |
| 365 | 84 | Wikiversity | 85 | Nofollow | en.wikiversity.org | Other opportunities | Free | Moderate | High | Verified live | Develop a neutral, sourced learning project about privacy, accessibility, or online-scam literacy and cite your tool only in relevant exercises. | Content must be freely licensed, verifiable, collaborative, and non-promotional; external links must directly serve learning. | 2026-08-05 — https://en.wikiversity.org/wiki/Creating_Wikiversity_Courses | Open Wikiversity submit page (new tab)Wikiversity details |
| 366 | 84 | Windmill Hub | 55 | Link type unknown | windmill.dev | Communities and forums | Free | Moderate | High | Verified live | Publish a reusable your tool-backed privacy or security script, flow, app, or resource type for the public Windmill Hub. | Submission must be reusable and documented; Windmill team reviews and approves community Hub entries. | 2026-08-05 | Open Windmill Hub submit page (new tab)Windmill Hub details |
| 367 | 84 | Working Not Working | 50 | Link type unknown | workingnotworking.com | Other opportunities | Free | Moderate | High | Verified live | Build a genuine founder or designer profile and publish a detailed your tool UX, accessibility, or privacy-design case study with accurate role and process credits. | Use a real individual creative identity, not a company backlink shell; upload original work, credit collaborators, and explain the project. | Official Working Not Working member profile guidance checked 2026-08-07 | Open Working Not Working submit page (new tab)Working Not Working details |
| 368 | 84 | Xero App Store | 85 | Nofollow | developer.xero.com | Marketplaces and app stores | Free | Moderate | High | Live, conditional | Build an your tool accounting/privacy integration, validate it with customers, certify and publish it in the Xero App Store. | Requires a real Xero integration and at least three customers for certification; technical and partner review apply. | https://developer.xero.com/static/otherfiles/Grow-with-the-Xero-App-Store.pdf | Open Xero App Store submit page (new tab)Xero App Store details |
| 369 | 84 | YouTube | 100 | Nofollow | youtube.com | Profiles and entities | Free | Moderate | High | Not submitted | Create tutorials for top your tool tools with links. | Needs useful videos; links mostly referral/brand. | 2026-07-30 | Open YouTube submit page (new tab)YouTube details |
| 370 | 84 | YunoHost Apps | 55 | Link type unknown | apps.yunohost.org | Other opportunities | Free | Moderate | High | Verified live | Package a free-software self-hosted your tool deployment, implement reliable install, upgrade, backup and restore operations, then submit it to the official app catalog. | Only freely licensed software is accepted; app-quality tests, packaging conventions, security, resource use and long-term maintenance must meet YunoHost review. | 2026-08-05 | Open YunoHost Apps submit page (new tab)YunoHost Apps details |
| 371 | 84 | Zed Extensions | 65 | Link type unknown | zed.dev | Marketplaces and app stores | Free | Moderate | High | Not submitted | Create a sandbox-compatible Zed extension for local secret, Unicode, or privacy checks, test it, publish its repository, and submit the registry pull request. | Extension ID must be unique, licensing acceptable, functionality non-duplicative, and repository public; review controls inclusion and listing links. | 2026-08-03 | Open Zed Extensions submit page (new tab)Zed Extensions details |
| 372 | 84 | Zeek Packages | 45 | Link type unknown | packages.zeek.org | Developer registries | Free | Moderate | High | Verified live | Build a defensive Zeek script or plugin for privacy-safe log inspection, include zkg metadata and tests, then register it in the default Zeek package source. | Must be genuine Zeek functionality, live in a public Git repository, follow package metadata conventions, pass tests, and receive repository review. | Official Zeek package creation and source-registration docs checked 2026-08-05 | Open Zeek Packages submit page (new tab)Zeek Packages details |
| 373 | 84 | Zenodo | 85 | Nofollow | zenodo.org | Software directories | Free | Moderate | High | Verified live | Publish a genuine open your tool dataset, benchmark, software release, poster, or reproducible research artifact and connect its related identifier to your tool. | Not for marketing PDFs. Upload a reusable artifact with accurate creators, license, metadata, and persistent record. | https://help.zenodo.org/docs/deposit/create-new-upload/ | Open Zenodo submit page (new tab)Zenodo details |
| 374 | 84 | Zoom App Marketplace | 95 | Link type unknown | zoom.us | Marketplaces and app stores | Free | Moderate | High | Verified live | Build a minimal-scope Zoom app that sends selected meeting content to an explicit your tool privacy or redaction workflow and links its support, privacy, and documentation pages. | Public apps undergo functional and security review; dedicated support, terms, privacy policy, documentation, and minimum permissions are required. | Official Zoom app distribution documentation checked 2026-08-07 | Open Zoom App Marketplace submit page (new tab)Zoom App Marketplace details |
| 375 | 83 | AI Tools by Neil Patel | — | Link type unknown | neilpatel.com | AI tool directories | Free + paid tier | Quick | High | Needs checking | Submit the AI prompt tools suite with a clear free-plan description. | High-authority domain (reported DR ~91); find the submit link on the site. | Added 2026-11-01 | Open AI Tools by Neil Patel submit page (new tab)AI Tools by Neil Patel details |
| 376 | 83 | Coda Gallery Packs | 85 | Nofollow | coda.io | Marketplaces and app stores | Free + paid tier | Quick | High | Verified live | Build a useful Coda Pack that connects to your tool functionality and publish it to the Gallery with documentation and support links. | Pack must be secure, functional and compliant with Coda data, authentication and publishing policies. | Official Coda help article checked 2026-07-30 | Open Coda Gallery Packs submit page (new tab)Coda Gallery Packs details |
| 377 | 83 | Contra | 75 | Nofollow | contra.com | Startup directories | Free + paid tier | Quick | High | Not submitted | Create the founder or studio portfolio and publish your tool as a detailed product case study with the live project link. | Use a real professional identity and show genuine work, process, and outcomes; do not create a shell profile only for a backlink. | 2026-08-03 | Open Contra submit page (new tab)Contra details |
| 378 | 83 | Crunchbase | 90 | Nofollow | crunchbase.com | Startup directories | Free + paid tier | Quick | High | Not submitted | Create/claim company profile linking your tool/Anslation. | High authority entity/profile; company details needed. | 2026-07-30 | Open Crunchbase submit page (new tab)Crunchbase details |
| 379 | 83 | Eventbrite | 90 | Nofollow | eventbrite.com | Profiles and entities | Free + paid tier | Quick | High | Verified live | Host a genuine your tool privacy/tool workshop or webinar; add your tool in the organizer website field and useful event description. | Do not create fake events or thin SEO pages; publish only a real scheduled event with attendee value. | https://www.eventbrite.com/help/en-us/articles/161196/how-to-set-up-your-organizer-profile-page/ | Open Eventbrite submit page (new tab)Eventbrite details |
| 380 | 83 | Justdial | 80 | Nofollow | justdial.com | Business directories | Free + paid tier | Quick | High | Verified live | Create a verified your tool listing with Indian phone, address, category, hours, website, social links, and product or service details. | Mobile OTP, address, and business details are required; expect sales upsells and keep all information consistent. | https://www.justdial.com/free-listing | Open Justdial submit page (new tab)Justdial details |
| 381 | 83 | JustGotFound | — | Link type unknown | justgotfound.com | Launch platforms | Free + paid tier | Quick | High | Verified live | Use the free submission tier for a standard your tool listing. | Do not buy promotion until referral value is measured; listing remains after promotion ends. | 2026-08-05 | Open JustGotFound submit page (new tab)JustGotFound details |
| 382 | 83 | MCP.so | 50 | Link type unknown | mcp.so | Other opportunities | Free + paid tier | Quick | High | Live, conditional | Submit a real public your tool MCP server repository with correct name, install steps and configuration details. | Free listing uses random placement and a nofollow link; only submit a working maintained MCP server. | 2026-08-04 | Open MCP.so submit page (new tab)MCP.so details |
| 383 | 83 | Observable | 80 | Nofollow | observablehq.com | Profiles and entities | Free + paid tier | Quick | High | Verified live | Publish an original interactive notebook showing transparent your tool benchmark, privacy, performance, or tool-usage data and cite the relevant your tool pages. | Use only public/non-sensitive data; public notebooks and referenced files are indexable, reusable, and must have accurate sources and licensing. | https://observablehq.com/documentation/collaboration/sharing | Open Observable submit page (new tab)Observable details |
| 384 | 83 | Odoo Apps Store | 90 | Link type unknown | odoo.com | Marketplaces and app stores | Free + paid tier | Quick | High | Verified live | Build and document an your tool Odoo module, register its repository, and upload a maintained free or paid listing. | Odoo must receive repository read access; metadata, compatibility, licensing, screenshots, and support must follow store rules. | Official Odoo Apps upload page checked 2026-08-07 | Open Odoo Apps Store submit page (new tab)Odoo Apps Store details |
| 385 | 83 | Pressbooks Self-Publisher | 75 | Link type unknown | pressbooks.com | Publishing platforms | Free + paid tier | Quick | High | Verified live | Create an accessible, openly licensed handbook or course text with structured chapters, exercises, citations, and relevant links, then make the webbook public for directory discovery. | One book per self-publisher subscription; ongoing editing requires a paid plan. Use an open license for durable open hosting/discoverability after cancellation and ensure the book is substantive, accessible, and rights-cleared. | 2026-08-03 | Open Pressbooks Self-Publisher submit page (new tab)Pressbooks Self-Publisher details |
| 386 | 83 | Qwoted | 50 | Link type unknown | qwoted.com | PR and source platforms | Free + paid tier | Quick | High | Needs checking | Create expert/source profile for media coverage requests. | Respond fast with unique founder/product data. | 2026-07-30 | Open Qwoted submit page (new tab)Qwoted details |
| 387 | 83 | ShipList | — | Link type unknown | shipli.st | Other opportunities | Free + paid tier | Quick | High | Verified live | Use the free listing path for your tool; evaluate paid multi-directory service separately. | Keep this task to the direct ShipList profile; do not authorize bulk third-party submissions blindly. | 2026-08-05 | Open ShipList submit page (new tab)ShipList details |
| 388 | 83 | Startup Stash | 55 | Dofollow | startupstash.com | Startup directories | Free + paid tier | Quick | High | Not submitted | List your tool as productivity/developer/startup resource. | Selective curation; make category fit clear. | 2026-07-30 | Open Startup Stash submit page (new tab)Startup Stash details |
| 389 | 81 | 2600: The Hacker Quarterly | 60 | Link type unknown | 2600.com | Publishing platforms | Free | Involved | High | Not submitted | Submit an original hacker-spirit article on a privacy failure, scam-defense experiment, file-forensics method, or unusual defensive technique—not an your tool advertisement. | The editor selects intelligent, interesting work; publication is not guaranteed. Treat the piece as independent technical journalism and keep product promotion out of it. | 2026-08-03 | Open 2600: The Hacker Quarterly submit page (new tab)2600: The Hacker Quarterly details |
| 390 | 81 | A List Apart | 80 | Sometimes dofollow | alistapart.com | Publishing platforms | Free | Involved | High | Verified live | Pitch an original standards, accessibility, privacy, or responsible-web essay based on first-hand product engineering experience. | Original 600–2,500-word editorial work only; sales pitches, press releases, and disguised promotion are rejected. | https://alistapart.com/about/contribute/ | Open A List Apart submit page (new tab)A List Apart details |
| 391 | 81 | AI Tools Directory | 30 | Link type unknown | aitoolsdirectory.com | AI tool directories | Free + paid tier | Moderate | High | Not submitted | Submit AI-assisted privacy/safety tools. | Manual review; only AI-related tools. | 2026-07-30 | Open AI Tools Directory submit page (new tab)AI Tools Directory details |
| 392 | 81 | AI Verify Foundation | 35 | Link type unknown | aiverifyfoundation.sg | Other opportunities | Free | Involved | High | Live, conditional | Run AI Verify on a real your tool AI use case, then submit accurate results, version, experience, lessons and company logo. | Requires a genuine model/use case and substantive learnings; editorial acceptance, publication and backlinks are not guaranteed. | 2026-08-04 | Open AI Verify Foundation submit page (new tab)AI Verify Foundation details |
| 393 | 81 | AI With Me | — | Link type unknown | aiwith.me | Software directories | Free | Involved | High | Not submitted | Submit your tool with homepage URL, privacy-first positioning, logo, screenshots and accurate pricing. | Accurate tool details required; editorial approval controls publication. Dofollow is reported but recheck after approval. | 2026-07-30 • https://www.submission.directory/site/ai-with-me | Open AI With Me submit page (new tab)AI With Me details |
| 394 | 81 | AI X Collection | — | Link type unknown | aixcollection.com | Software directories | Free | Involved | High | Needs checking | Submit your tool with homepage URL, privacy-first positioning, logo, screenshots and accurate pricing. | Accurate tool details required; editorial approval controls publication. Dofollow is reported but recheck after approval. | 2026-07-30 • https://www.submission.directory/site/ai-x-collection | Open AI X Collection submit page (new tab)AI X Collection details |
| 395 | 81 | AIAI.Tools | — | Link type unknown | aiai.tools | Software directories | Free | Involved | High | Not submitted | Submit your tool with homepage URL, privacy-first positioning, logo, screenshots and accurate pricing. | Accurate tool details required; editorial approval controls publication. Listing link is currently reported nofollow. | 2026-07-30 • https://www.submission.directory/site/aiai-tools | Open AIAI.Tools submit page (new tab)AIAI.Tools details |
| 396 | 81 | Anaconda.org | 75 | Nofollow | anaconda.org | Developer registries | Free + paid tier | Moderate | High | Verified live | Build and upload a real conda package with homepage, documentation, source and license metadata. | Use anaconda-client and maintain valid packages; notebook and environment uploads are no longer supported. | Official Anaconda.org docs and current client page checked 2026-07-30 | Open Anaconda.org submit page (new tab)Anaconda.org details |
| 397 | 81 | Appa List | — | Link type unknown | appalist.com | Software directories | Free | Involved | High | Needs checking | Submit your tool with homepage URL, privacy-first positioning, logo, screenshots and accurate pricing. | Accurate tool details required; editorial approval controls publication. Dofollow is reported but recheck after approval. | 2026-07-30 • https://www.submission.directory/site/appa-list | Open Appa List submit page (new tab)Appa List details |
| 398 | 81 | Apple Business | 100 | Nofollow | business.apple.com | Business directories | Free + paid tier | Moderate | High | Verified live | Verify the organization, claim any legitimate your tool location, and add logo, hours, images, website, and key details. | Requires organization or location verification; features and service availability vary by country and region. | https://support.apple.com/guide/business/sign-up-and-verify-your-organization-axm402206497/web | Open Apple Business submit page (new tab)Apple Business details |
| 399 | 81 | Apple Podcasts for Creators | 100 | Nofollow | podcasters.apple.com | Other opportunities | Free + paid tier | Moderate | High | Live, conditional | Submit a genuine your tool podcast RSS feed in Podcasts Connect and include the official show website in valid metadata. | Requires at least one episode, compliant RSS, artwork, content rights, technical validation, and Apple review. | 2026-08-05 | Open Apple Podcasts for Creators submit page (new tab)Apple Podcasts for Creators details |
| 400 | 81 | Are.na | 70 | Nofollow | are.na | Publishing platforms | Free + paid tier | Moderate | High | Verified live | Curate a thoughtful public channel on local-first privacy, scam safety, or accessible-tool design, adding your tool only among diverse high-quality resources with original annotations. | Build a real research collection, not a channel containing only AltFTool links. Credit sources, use rights-cleared uploads, and disclose ownership when annotating AltFTool. Channels/blocks are user-created UGC; moderation, public visibility, crawlability, and rel/follow behavior can change without guarantee. | 2026-08-03 | Open Are.na submit page (new tab)Are.na details |
How to build backlinks with this list
Four steps that work for a new site, a SaaS or a side project. No paid link packages, nothing that risks a penalty.
Get the basics right first
Before submitting anywhere, have a one-line description, a 150-word description, a square logo and two or three screenshots ready. Every form asks for some mix of these.
Claim profiles and free listings
Start with the free, quick rows: profile creation sites and free directories. They are one form each and build the entity signals search engines use to understand who you are.
Go after a few strong links
Then pick a handful of high DA and dofollow sites that fit your niche, and write proper guest posts or launch posts for them. Ten relevant links beat a hundred random ones.
Track and keep it clean
Note where you submitted and when. Recheck after a month, update stale descriptions, and never pay for bulk link packages: they put the whole site at risk.
Behind the list
A link opportunity is not a link.
Every row here starts as a line in a sheet, gets normalised into one of 16 groups, scored for cost, effort and impact, and written up with the steps to actually submit. The floor below represents that pipeline.
Open the sheet viewAn illustration of the AltF Backlinks floor: opportunities sourced at the back, vetted for cost and effort by the engineering pod, written up for outreach by the design pod, then tracked to placement along a line.
Backlink sites by category
Product launch sites87
One-shot launches where timing and preparation decide the outcome.
Guest posting sites55
Publications that accept contributed articles. Slow and editorial, but the links are earned.
AI tool directories200
Fast-growing listings specifically for AI-powered tools.
App stores and marketplaces273
Extension, plugin and integration stores. Real review processes, real distribution.
Startup directory submission sites120
Startup listings, beta lists and founder media.
Software directory submission sites215
General tool and software catalogues with real search traffic.
Software review sites29
B2B review sites. Slow to approve, strong once live.
Developer platforms for backlinks139
Package, image and docs hosting that carries real authority.
Web design galleries for backlinks87
Showcases judged on craft. A good screenshot matters more than copy.
Web 2.0 and publishing sites214
Write once, link back. Editorial standards vary widely.
PR and press release sites41
Get quoted or distribute a release. Slower, higher ceiling.
Business directory submission sites109
Company and local listings. Unglamorous, consistently indexed.
Profile creation sites163
Owned pages you control: company, founder, knowledge-panel entities.
Forum and community backlink sites61
Answer real questions. Never drop a bare link.
Social bookmarking sites18
Brand surface and referral traffic more than link equity.
More backlink opportunities153
Everything that does not fit the buckets above.
Common questions
Do backlinks still matter for ranking in 2026?
Links remain one signal among many, and low-quality bulk links do more harm than good. What still works is being listed where your buyers actually look — directories with real traffic, registries your peers use, and launch platforms with engaged audiences. Every entry in this list is a place a human might plausibly find you, which is why they are worth submitting to regardless of link equity.
Which submissions should I do first?
Start with the quick wins filter: free, low effort, and not in the lowest priority band. 208 of the 1,964 entries qualify, and those are the ones where a single form submission gets you a live listing the same week. Launch platforms are worth saving until your product is genuinely ready, because you only get one good attempt at each.
How is the impact score calculated?
It starts from a hand-assigned priority band (do first, high, medium, later), then adjusts for cost and effort. A free, quick opportunity scores above a paid, involved one in the same band, because it is the one you can realistically finish today. The score is a queueing aid, not a measure of domain authority.
Are these links free?
1,628 of the 1,964 entries are free to submit to or offer a free tier that includes a listing. Cost is shown on every row, and the "nothing to pay" filter narrows the list to exactly those.
Which backlink sites are dofollow?
44 entries are known to give a followed link on a normal listing, and more give one only in some placements. The link type is shown on every row and can be filtered. Sites change their link policy without notice, so treat the label as a starting point and check the live page after you are listed. A nofollow link from a busy site still sends visitors and helps search engines discover you.
What does the DA number mean?
It is our estimate of the site's domain authority, a third-party style 0-100 score of how strong a domain's link profile is, rounded to the nearest 5. 1,580 of the 1,964 sites have one. It is useful for comparing sites, not a Google metric, so relevance to your niche still matters more.
How do I get backlinks for a new website?
1. Get the basics right first: Before submitting anywhere, have a one-line description, a 150-word description, a square logo and two or three screenshots ready. Every form asks for some mix of these. 2. Claim profiles and free listings: Start with the free, quick rows: profile creation sites and free directories. They are one form each and build the entity signals search engines use to understand who you are. 3. Go after a few strong links: Then pick a handful of high DA and dofollow sites that fit your niche, and write proper guest posts or launch posts for them. Ten relevant links beat a hundred random ones. 4. Track and keep it clean: Note where you submitted and when. Recheck after a month, update stale descriptions, and never pay for bulk link packages: they put the whole site at risk.
Will submitting everywhere hurt my site?
Submitting to spam directories can. That is why this list is curated rather than scraped, and why entries carry a status showing whether they have been verified as live. Skip anything that promises hundreds of links for a fee, and prefer places where a real person reviews submissions.