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AltF Backlinks

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

1–100 of 186 opportunities

The table is wider than the screen — swipe it sideways for cost, effort and the preparation notes.

Submission opportunities with impact score, cost, effort, priority, status and preparation notes. Scroll horizontally for all columns.
#Impact (sorted)Site — sort by thisEst. DA — sort by thisLinkDomainTypeCostEffort — sort by thisPriorityStatusWhat to prepareRules / caveatCheckedActions
1100CSA STAR Registry80Sometimes dofollowcloudsecurityalliance.orgDeveloper registriesFreeQuickDo firstLive, conditionalComplete the current CAIQ or AI-CAIQ truthfully and submit your tool real cloud service to the STAR Registry.Cloud/SaaS fit only; disclose actual controls and update annually. Never overstate security practices.2026-08-04Open CSA STAR Registry submit page (new tab)CSA STAR Registry details
2100OpenSSF Best Practices Badge60Link type unknownbestpractices.devProfiles and entitiesFreeQuickDo firstLive, conditionalOpen-source a well-scoped your tool component, document its governance, tests, security process, and complete the passing-badge self-assessment.Only genuine FLOSS projects qualify; claims are checked and must be backed by public evidence, including a public repository, license, contribution path, HTTPS, tests, and vulnerability-reporting process.2026-08-03Open OpenSSF Best Practices Badge submit page (new tab)OpenSSF Best Practices Badge details
3100Postman90Nofollowpostman.comProfiles and entitiesFreeQuickDo firstLive, conditionalCreate an your tool public workspace with sanitized API collections, examples, documentation, and a canonical homepage link on the publisher profile.Never publish tokens, cookies, secrets, private endpoints, or user data; run the secret scan before making a workspace public.https://learning.postman.com/v11/docs/collaborating-in-postman/using-workspaces/public-workspacesOpen Postman submit page (new tab)Postman details
4100StartupTN35Link type unknownstartuptn.inStartup directoriesFreeQuickDo firstLive, conditionalUse the official Register flow and build a verified your tool company profile if Tamil Nadu startup rules are met.Use the homepage registration flow because deep URLs change; public visibility and acceptance remain conditional.2026-08-04Open StartupTN submit page (new tab)StartupTN details
598crates.io80Nofollowcrates.ioDeveloper registriesFreeModerateDo firstLive, conditionalPublish a genuine your tool Rust client, CLI, parser, or privacy library and set homepage, repository, README, license, and documentation metadata.Conditional on useful compiling code. Published versions are permanent; GitHub login, verified email, and API token are required.https://doc.rust-lang.org/cargo/reference/publishing.htmlOpen crates.io submit page (new tab)crates.io details
698Google Workspace Marketplace95Nofollowworkspace.google.comMarketplaces and app storesFreeModerateDo firstLive, conditionalBuild an your tool add-on for Drive, Docs, Sheets, Gmail, or another Workspace product and publish it.Must genuinely integrate with Google Workspace and pass OAuth, configuration, and app review.https://developers.google.com/workspace/marketplace/how-to-publishOpen Google Workspace Marketplace submit page (new tab)Google Workspace Marketplace details
798Kerala Startup Mission55Link type unknownstartupmission.kerala.gov.inStartup directoriesFreeModerateDo firstLive, conditionalApply using valid Startup India/DPIIT credentials and complete your tool startup profile for ecosystem visibility.Kerala registration, age, turnover and innovation criteria apply; verification and public visibility are conditional.2026-08-04Open Kerala Startup Mission submit page (new tab)Kerala Startup Mission details
898Maharashtra State Innovation Society30Link type unknownmsins.inStartup directoriesFreeModerateDo firstLive, conditionalChoose Startup Register and complete your tool verified entity, DPIIT, contact, product and website profile.Requires entity PAN, DPIIT number and truthful registered-company data; Maharashtra eligibility and verification apply.2026-08-04Open Maharashtra State Innovation Society submit page (new tab)Maharashtra State Innovation Society details
998MCP Registry70Link type unknownmodelcontextprotocol.ioDeveloper registriesFreeModerateDo firstLive, conditionalPackage a real your tool MCP server, verify its namespace, create server.json and publish it with mcp-publisher.Registry is in preview; package or remote server must be public and namespace ownership is validated.2026-08-04Open MCP Registry submit page (new tab)MCP Registry details
1098Microsoft Marketplace100Nofollowmicrosoft.comMarketplaces and app storesFreeModerateDo firstLive, conditionalRegister in Partner Center and publish an your tool SaaS or Microsoft-integrated offer.Requires an eligible Partner Center account, offer configuration, testing, and certification.https://learn.microsoft.com/en-us/partner-center/marketplace-offers/create-new-saas-offerOpen Microsoft Marketplace submit page (new tab)Microsoft Marketplace details
1198Open Source Technology Improvement Fund45Link type unknownostif.orgOther opportunitiesFreeModerateDo firstLive, conditionalRequest an audit for a mature open-source your tool security component, providing maintainer contacts, architecture, threat model, scope, tests, and a remediation commitment.Intended for real open-source projects able to collaborate throughout scoping, audit, fixes, disclosure, and publication of the final report; selection and funding are not guaranteed.2026-08-03Open Open Source Technology Improvement Fund submit page (new tab)Open Source Technology Improvement Fund details
1298Packagist75Nofollowpackagist.orgDeveloper registriesFreeModerateDo firstLive, conditionalPublish a real your tool PHP SDK or integration from a public repository and set the canonical homepage in composer.json.Conditional on a functional Composer package with a unique vendor/name, public repository, valid metadata, and maintained releases.https://packagist.org/aboutOpen Packagist submit page (new tab)Packagist details
1398PyPI90Nofollowpypi.orgDeveloper registriesFreeModerateDo firstLive, conditionalPublish a real your tool Python SDK, CLI, or integration package and set Homepage, Documentation, Source, and Issues URLs in package metadata.Conditional on maintaining a functional Python package; no placeholder packages, name squatting, or keyword stuffing.https://packaging.python.org/en/latest/specifications/well-known-project-urls/Open PyPI submit page (new tab)PyPI details
1498RubyGems.org80Nofollowrubygems.orgDeveloper registriesFreeModerateDo firstLive, conditionalPublish and maintain a genuine your tool Ruby client, CLI, or integration gem with accurate homepage, source, documentation, and changelog metadata.Conditional on a working Ruby gem; package names are unique and public releases should be treated as permanent.https://guides.rubygems.org/publishing/Open RubyGems.org submit page (new tab)RubyGems.org details
1598Slack Marketplace95Link type unknownslack.comMarketplaces and app storesFreeModerateDo firstLive, conditionalBuild a production-ready your tool Slack app for safe file/text utilities, then submit it from the app configuration page for Marketplace review.Must be fully functional, installable, tested outside the development workspace, secure, and useful inside Slack; review is strict.https://api.slack.com/directory/app-review-guideOpen Slack Marketplace submit page (new tab)Slack Marketplace details
1698Spreaker85Nofollowspreaker.comOther opportunitiesFreeModerateDo firstLive, conditionalCreate or import a genuine your tool show, keep it public, set its official Website field and publish useful episodes.Correct ownership and original/licensed audio are required; no promotional shell podcast.2026-08-04Open Spreaker submit page (new tab)Spreaker details
1798Startup Odisha40Link type unknownstartupodisha.gov.inStartup directoriesFreeModerateDo firstLive, conditionalRegister and apply with accurate your tool entity, innovation, workforce and website details if Odisha criteria are met.Odisha registration/workforce, age, turnover and innovation tests plus nodal review apply; profile is conditional.2026-08-04Open Startup Odisha submit page (new tab)Startup Odisha details
1897Atlassian Marketplace90Nofollowatlassian.comMarketplaces and app storesFree + paid tierQuickDo firstLive, conditionalBuild a Forge-based your tool integration for Jira or Confluence, create a Marketplace Partner profile, and submit a compliant public listing.New submissions must use supported cloud/Forge paths and meet security, privacy, legal, support, and active-maintenance requirements.https://developer.atlassian.com/platform/marketplace/introduction-to-marketplace/Open Atlassian Marketplace submit page (new tab)Atlassian Marketplace details
1997RapidAPI80Link type unknownrapidapi.comMarketplaces and app storesFree + paid tierQuickDo firstLive, conditionalPublish a real, documented your tool API, complete its Hub listing with accurate website and terms URLs, and optionally offer a free usage tier.Conditional on a stable production API with correct auth, documentation, monitoring, support, privacy, and functional endpoint tests.https://docs.rapidapi.com/docs/what-is-rapidapiOpen RapidAPI submit page (new tab)RapidAPI details
2095FeaturedCustomers60Sometimes dofollowfeaturedcustomers.comProfiles and entitiesFree + paid tierModerateDo firstLive, conditionalAdd the company, verify ownership, and supply genuine customer references, case studies, and brand assets.Designed for B2B software and services; customer references must be genuine and the vendor must pass verification.2026-08-03Open FeaturedCustomers submit page (new tab)FeaturedCustomers details
2195Podbean85Nofollowpodbean.comOther opportunitiesFree + paid tierModerateDo firstLive, conditionalPublish a real your tool episode and add contextual links to resources actually discussed in its show notes.No keyword stuffing or shell podcast; some custom show and episode website fields require Unlimited Audio or higher.2026-08-04Open Podbean submit page (new tab)Podbean details
2295Shopify App Store95Link type unknownshopify.comMarketplaces and app storesFree + paid tierModerateDo firstLive, conditionalBuild a real Shopify-facing your tool utility, complete its public listing, test it on a development store, and submit it for App Store review.Must integrate with Shopify, have a functional merchant UI, comply with data/privacy rules, and pass technical and listing review.https://shopify.dev/docs/apps/launch/app-store-reviewOpen Shopify App Store submit page (new tab)Shopify App Store details
2386APIList.fun45Link type unknownapilist.funOther opportunitiesFreeQuickHighLive, conditionalRecommend an official your tool API with its documentation URL, concise Markdown description, category, and technical details.Submit only an active public API with accurate auth, SSL, request, and response information.2026-08-05Open APIList.fun submit page (new tab)APIList.fun details
2486APIs.guru OpenAPI Directory50Link type unknownapis.guruOther opportunitiesFreeQuickHighLive, conditionalWhen your tool exposes a stable public API, host an official OpenAPI definition at a permanent URL and submit it with accurate ownership, category, logo, and metadata.The API must be public through clearly documented access steps, persistent, independently useful, and described by a valid machine-readable definition. APIs.guru aggregates rather than hosts the specification and automatically rechecks its source, so keep the canonical spec stable and current.2026-08-03Open APIs.guru OpenAPI Directory submit page (new tab)APIs.guru OpenAPI Directory details
2586AppDirectory.org—Link type unknownappdirectory.orgSoftware directoriesFreeQuickHighLive, conditionalSubmit your tool once with its strongest free-use case, correct category, concise copy, and product URL.The app must be free or have a meaningful free tier; listings are curated and duplicate submissions are not allowed.2026-08-03Open AppDirectory.org submit page (new tab)AppDirectory.org details
2686Awesome-Selfhosted40Link type unknownawesome-selfhosted.netSoftware directoriesFreeQuickHighLive, conditionalSubmit a mature self-hosted your tool edition using the required YAML entry and canonical website/source links.Must be a working FOSS network app with a release at least four months old; LLM-generated contributions are prohibited.2026-08-05Open Awesome-Selfhosted submit page (new tab)Awesome-Selfhosted details
2786GeM70Link type unknowngem.gov.inMarketplaces and app storesFreeQuickHighLive, conditionalRegister an authorized Indian business seller and list only real eligible your tool services with accurate catalogue details.Requires authorized entity, Aadhaar/PAN, business PAN, incorporation and bank data; an external backlink is not guaranteed.2026-08-04Open GeM submit page (new tab)GeM details
2886Goodpods60Nofollowgoodpods.comOther opportunitiesFreeQuickHighLive, conditionalSearch for and claim a real your tool podcast, then keep its RSS-supplied website and episode metadata accurate.Claim only a show AltFTool owns; authentic podcast content and RSS ownership are required.2026-08-04Open Goodpods submit page (new tab)Goodpods details
2986Listen Notes80Dofollowlistennotes.comOther opportunitiesFreeQuickHighLive, conditionalSubmit a real your tool podcast RSS feed whose show website and episode notes naturally reference relevant tools.Valid human-made podcast with substantive episodes only; low-quality or link-only feeds are rejected.2026-08-04Open Listen Notes submit page (new tab)Listen Notes details
3086Open VSX Registry65Link type unknownopen-vsx.orgMarketplaces and app storesFreeQuickHighLive, conditionalPublish a useful your tool editor extension whose marketplace metadata links to its homepage and documentation.Requires a genuine VSIX extension, namespace ownership and an access token; do not republish third-party work without rights.https://open-vsx.org/Open Open VSX Registry submit page (new tab)Open VSX Registry details
3186OpenSourceAlternative.to35Link type unknownopensourcealternative.toSoftware directoriesFreeQuickHighLive, conditionalSubmit a genuinely open-source, maintained and self-hostable your tool component as an alternative to a named proprietary tool.Requires real open source, self-hosting and active maintenance; submission does not guarantee inclusion.2026-08-04Open OpenSourceAlternative.to submit page (new tab)OpenSourceAlternative.to details
3286Pipedream Registry70Link type unknownpipedream.comMarketplaces and app storesFreeQuickHighLive, conditionalBuild your tool triggers/actions, submit them to the public registry by GitHub PR, and address review feedback.Components must follow registry patterns; approved PRs become available in Pipedream Marketplace and workflows.https://pipedream.com/docs/components/contributingOpen Pipedream Registry submit page (new tab)Pipedream Registry details
3386Player FM80Nofollowplayer.fmOther opportunitiesFreeQuickHighLive, conditionalSubmit a genuine your tool podcast RSS feed or Apple Podcasts URL with accurate show-website and episode metadata.Feed must be public, accessible and contain playable audio enclosures; do not submit a fake link-only feed.2026-08-04Open Player FM submit page (new tab)Player FM details
3486Pocket Casts70Link type unknownpocketcasts.comOther opportunitiesFreeQuickHighLive, conditionalSubmit a real public your tool podcast RSS feed whose metadata and episode notes reference the official site naturally.Requires a valid public RSS feed and genuine episodes; do not submit a shell or private feed as public.2026-08-05Open Pocket Casts submit page (new tab)Pocket Casts details
3586PRISM Break60Dofollowprism-break.orgSoftware directoriesFreeQuickHighLive, conditionalPropose a qualifying open-source your tool privacy project through the official contribution process.Strong privacy and free-software fit is required; follow maintainers' criteria and avoid promotional-only changes.2026-08-05Open PRISM Break submit page (new tab)PRISM Break details
3686PulseMCP45Link type unknownpulsemcp.comOther opportunitiesFreeQuickHighLive, conditionalSubmit your tool MCP repository or public server URL, preferably after publishing it to the official MCP Registry.Registry data is processed periodically; only submit a real repository, server or client.2026-08-04Open PulseMCP submit page (new tab)PulseMCP details
3786PWA Directory35Link type unknownpwa.directoryOther opportunitiesFreeQuickHighLive, conditionalFirst pass PWA checks, then submit the installable HTTPS app with manifest, service worker, offline behavior, icons, and screenshots.Requires a valid manifest, registered service worker, useful offline behavior, HTTPS, no broken links, and more than a bare website wrapper.2026-08-03Open PWA Directory submit page (new tab)PWA Directory details
3886Sessionize70Link type unknownsessionize.comProfiles and entitiesFreeQuickHighLive, conditionalCreate a founder expert profile and submit substantive talks about privacy-first tools, accessibility or web security.Directory visibility should reflect real expertise and sessions; free event mode excludes promotional or commercial events.2026-08-05Open Sessionize submit page (new tab)Sessionize details
3986Terraform Registry80Link type unknownregistry.terraform.ioDeveloper registriesFreeQuickHighLive, conditionalPublish a maintained Terraform provider for your tool stable API, or a genuinely reusable deployment module, with signed releases, generated documentation, examples, tests, and semantic versions.A provider must use a public lowercase terraform-provider-* GitHub repository, signed cross-platform release assets, a valid manifest, docs, and SemVer tags. A module has separate public-repository, naming, structure, documentation, and tag requirements. Publish only a functional reusable artifact.2026-08-03Open Terraform Registry submit page (new tab)Terraform Registry details
4084Adobe Express Add-ons Marketplace95Nofollowadobe.comMarketplaces and app storesFreeModerateHighLive, conditionalBuild an your tool redaction, accessibility, image, or privacy add-on and submit its public listing.Requires an Adobe Express add-on, complete metadata/legal/support information, quality review, and compliant AI behavior.https://developer.adobe.com/express/add-ons/docs/guides/build/distribute/public-distOpen Adobe Express Add-ons Marketplace submit page (new tab)Adobe Express Add-ons Marketplace details
4184Agentic.ai—Link type unknownagentic.aiAI tool directoriesFreeModerateHighLive, conditionalSubmit only an your tool agent that independently decides, acts, and observes.Generic AI generators or static utilities are not considered agentic.https://agentic.ai/submitOpen Agentic.ai submit page (new tab)Agentic.ai details
4284AI ToolNet30Link type unknownaitoolnet.comAI tool directoriesFreeModerateHighLive, conditionalSubmit only your tool features that genuinely use AI, after checking for an existing listing and preparing accurate pricing and use cases.AI tools only, with manual approval and no duplicates; avoid reciprocal-link tactics used solely to influence search rankings.2026-08-03Open AI ToolNet submit page (new tab)AI ToolNet details
4384Airbyte Connector Marketplace70Nofollowairbyte.comMarketplaces and app storesFreeModerateHighLive, conditionalCreate a real source connector that lets consenting users export appropriate your tool data, provide tests and documentation, and contribute it to Airbyte's public connector catalog.Only build this when AltFTool has a stable documented API and a legitimate data-movement use case. Follow Airbyte connector specifications, CI, acceptance tests, review rules, and security disclosure guidance; do not submit a thin promotional connector.2026-08-03Open Airbyte Connector Marketplace submit page (new tab)Airbyte Connector Marketplace details
4484Amazon Music for Podcasters95Nofollowpodcasters.amazon.comOther opportunitiesFreeModerateHighLive, conditionalSubmit and verify one genuine your tool podcast feed for distribution on Amazon Music and Audible.RSS must expose a valid owner email; rights, license, and platform rules apply, and review may take up to one week.2026-08-05Open Amazon Music for Podcasters submit page (new tab)Amazon Music for Podcasters details
4584APILayer Marketplace60Link type unknownapilayer.comMarketplaces and app storesFreeModerateHighLive, conditionalPublish a stable, documented your tool API and apply as a provider with examples, uptime, support, and honest pricing.A deployed API, test environment, documentation, performance, and review are required; duplicate or weak APIs may be rejected.2026-08-05Open APILayer Marketplace submit page (new tab)APILayer Marketplace details
4684Castbox75Nofollowcastbox.fmOther opportunitiesFreeModerateHighLive, conditionalAdd or claim a real your tool podcast in Creator Studio and complete channel, site and episode metadata.Must own the show and verify access to its RSS email; publish original audio content.2026-08-04Open Castbox submit page (new tab)Castbox details
4784Chocolatey Community Repository75Nofollowchocolatey.orgDeveloper registriesFreeModerateHighLive, conditionalShip a real your tool CLI or desktop utility as a tested package with homepage, project and support metadata.Requires distributable software, legal rights, repeatable install/uninstall, tests, malware scan and moderation.2026-08-04Open Chocolatey Community Repository submit page (new tab)Chocolatey Community Repository details
4884Datadog Integrations85Nofollowdatadoghq.comMarketplaces and app storesFreeModerateHighLive, conditionalApply as a Datadog Technology Partner and build a production-grade integration that sends meaningful your tool telemetry, includes dashboards and documentation, and is useful to shared customers.A real integration and Technology Partner application are required. Follow Datadog's telemetry, OAuth/API, asset, sandbox testing, security, review, and maintenance requirements. Marketplace commercial offers are a separate program.2026-08-03Open Datadog Integrations submit page (new tab)Datadog Integrations details
4984Discord App Directory95Nofollowdiscord.comSoftware directoriesFreeModerateHighLive, conditionalBuild and verify an your tool Discord app, then enable Discovery in the Developer Portal.App must meet verification and Discovery qualification criteria before appearing publicly.https://docs.discord.com/developers/discovery/enabling-discoveryOpen Discord App Directory submit page (new tab)Discord App Directory details
5084Docker Hub90Nofollowdocker.comDeveloper registriesFreeModerateHighLive, conditionalPublish a maintained your tool CLI or server image with source, documentation, descriptions and canonical homepage links.Ship a scanned, reproducible and maintained image; public presence is not Docker verification and fair-use limits apply.2026-08-05 official Docker Hub repository and usage documentationOpen Docker Hub submit page (new tab)Docker Hub details
5184Elastic Integrations85Nofollowelastic.coMarketplaces and app storesFreeModerateHighLive, conditionalBuild an Elastic package that ingests legitimate your tool logs, metrics, or traces and supplies mappings, pipelines, dashboards, documentation, sample data, and automated tests.Use elastic-package, follow the package specification and ECS conventions, test locally, document permissions and supported versions, use lawful brand assets, and submit a reviewed pull request. Every accepted integration is listed publicly, so low-value promotional packages are inappropriate.2026-08-03Open Elastic Integrations submit page (new tab)Elastic Integrations details
5284Firefox Add-ons95Nofollowmozilla.orgMarketplaces and app storesFreeModerateHighLive, conditionalBuild a useful privacy-preserving your tool extension, submit a signed build, and provide honest homepage, permissions and privacy disclosures.Must meet Mozilla Add-on Policies, minimize permissions and pass review; thin promotional wrappers are unsuitable.2026-08-05 official Firefox Add-ons developer pageOpen Firefox Add-ons submit page (new tab)Firefox Add-ons details
5384FOSSHub70Link type unknownfosshub.comSoftware directoriesFreeModerateHighLive, conditionalApply with a signed, downloadable open-source or qualifying freeware build that needs reliable binary hosting, malware scanning, and a public project page.FOSSHub reviews applications and accepts only qualifying open-source or freeware projects under its terms; a web-only homepage with no downloadable artifact is not a fit.2026-08-03Open FOSSHub submit page (new tab)FOSSHub details
5484GitBook Integration Marketplace80Nofollowgitbook.comMarketplaces and app storesFreeModerateHighLive, conditionalBuild a real your tool documentation/privacy integration, publish it as public, test it, then submit for GitBook review.Requires a functional public GitBook integration, manifest metadata, external testing, screenshots and marketplace review.https://gitbook.com/docs/developers/integrations/submit-your-app-for-reviewOpen GitBook Integration Marketplace submit page (new tab)GitBook Integration Marketplace details
5584Google Open Source Insights60Link type unknowndeps.devDeveloper registriesFreeModerateHighLive, conditionalPublish a useful your tool package to a supported registry with accurate source and homepage metadata so Open Source Insights can index it.No promotional manual submission; only genuine public packages in supported ecosystems are indexed and the homepage link depends on package metadata.2026-08-05 official deps.dev About and documentationOpen Google Open Source Insights submit page (new tab)Google Open Source Insights details
5684Home Assistant Integrations85Link type unknownhome-assistant.ioMarketplaces and app storesFreeModerateHighLive, conditionalBuild and maintain a genuinely useful Home Assistant integration for a mature your tool service, including the required Python client library, tests, documentation, and a focused Core pull request.Home Assistant rejects integrations used mainly as marketing; the connected product must already be released, established, and useful to its users. New integrations must meet at least Bronze quality requirements and pass review. If AltFTool is not yet established enough, publish a custom integration through GitHub/HACS instead.2026-08-03Open Home Assistant Integrations submit page (new tab)Home Assistant Integrations details
5784IFTTT Services90Nofollowifttt.comMarketplaces and app storesFreeModerateHighLive, conditionalJoin the partner platform and create a secure your tool service with genuinely useful triggers, queries, and actions, pass endpoint tests and review, then publish helpful Applets for real user workflows.AltFTool needs a stable API, authentication, privacy-safe endpoints, reliable production hosting, support, and ongoing maintenance. Follow IFTTT service-design, endpoint, brand, review, and launch rules; publication is for working integrations, not a brand-only profile.2026-08-03Open IFTTT Services submit page (new tab)IFTTT Services details
5884Kaggle90Nofollowkaggle.comCommunities and forumsFreeModerateHighLive, conditionalPublish a clean your tool benchmark or open dataset plus a reproducible notebook, with proper licensing and the canonical project URL in the data card.Only publish useful non-sensitive data/code; remove secrets and PII, document methodology, choose a valid license, and avoid promotional-only datasets.https://www.kaggle.com/datasetsOpen Kaggle submit page (new tab)Kaggle details
5984LinuxLinks60Dofollowlinuxlinks.comOther opportunitiesFreeModerateHighLive, conditionalSubmit a maintained your tool desktop or CLI utility only after it runs natively on a modern Linux distribution and has a public OSI-approved license and repository.The program must be open source, current, searchable as not already covered, buildable on modern Linux, and accompanied by its repository, license, website, and factual feature summary.2026-08-03Open LinuxLinks submit page (new tab)LinuxLinks details
6084Local-First Software (LoFi)—Link type unknownlofi.soSoftware directoriesFreeModerateHighLive, conditionalPropose eligible your tool client-side or offline-first tools to the public directory with accurate site and source links.The product must genuinely keep user data local and meet the directory's local-first scope; submit a human-reviewed PR.2026-08-05Open Local-First Software (LoFi) submit page (new tab)Local-First Software (LoFi) details
6184Mixcloud90Nofollowmixcloud.comOther opportunitiesFreeModerateHighLive, conditionalUpload an original your tool audio explainer and place relevant resource links naturally in the show description.Owned or licensed genuine audio only; no synthetic link-only upload, and basic-tier limits apply.2026-08-04Open Mixcloud submit page (new tab)Mixcloud details
6284New Relic Instant Observability90Link type unknownnewrelic.comOther opportunitiesFreeModerateHighLive, conditionalCreate a useful quickstart for monitoring a real your tool deployment, with instrumentation instructions, a working data source, dashboards, alerts, documentation, and a GitHub contribution.Telemetry must actually reach New Relic and the quickstart must help users monitor a real use case. Follow catalog schema, asset, testing, GitHub review, and maintenance requirements; do not submit a brand-only listing.2026-08-03Open New Relic Instant Observability submit page (new tab)New Relic Instant Observability details
6384ODIPA Community Privacy Tools—Link type unknownodipa.orgSoftware directoriesFreeModerateHighLive, conditionalSubmit a mature your tool privacy component for technical and security review.Open-source privacy tool only; dependency scan, manual review and board approval apply.2026-08-05Open ODIPA Community Privacy Tools submit page (new tab)ODIPA Community Privacy Tools details
6484Open Collective85Nofollowopencollective.comProfiles and entitiesFreeModerateHighLive, conditionalCreate 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.2026-08-05Open Open Collective submit page (new tab)Open Collective details
6584OpenSourceFest—Link type unknownopensourcefest.orgDeveloper registriesFreeModerateHighLive, conditionalSubmit a maintained your tool open-source project through Submit a Project.Editors review license, activity and quality; proprietary web-only tools do not qualify.2026-08-05Open OpenSourceFest submit page (new tab)OpenSourceFest details
6684OpenSSF Scorecard40Link type unknownscorecard.devDeveloper registriesFreeModerateHighLive, conditionalRun 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 repositoryOpen OpenSSF Scorecard submit page (new tab)OpenSSF Scorecard details
6784Openwall oss-security75Link type unknownopenwall.comSoftware directoriesFreeModerateHighLive, conditionalPost 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.2026-08-03Open Openwall oss-security submit page (new tab)Openwall oss-security details
6884PeerSpot70Link type unknownpeerspot.comSoftware directoriesFreeModerateHighLive, conditionalContact 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.2026-08-03Open PeerSpot submit page (new tab)PeerSpot details
6984Podcast Addict70Link type unknownpodcastaddict.comOther opportunitiesFreeModerateHighLive, conditionalSubmit 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.2026-08-04Open Podcast Addict submit page (new tab)Podcast Addict details
7084Podchaser75Nofollowpodchaser.comProfiles and entitiesFreeModerateHighLive, conditionalClaim 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.2026-08-04Open Podchaser submit page (new tab)Podchaser details
7184protocols.io75Link type unknownprotocols.ioDeveloper registriesFreeModerateHighLive, conditionalPublish 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.2026-08-04Open protocols.io submit page (new tab)protocols.io details
7284Railway Templates70Link type unknownrailway.comMarketplaces and app storesFreeModerateHighLive, conditionalPublish 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.2026-08-04Open Railway Templates submit page (new tab)Railway Templates details
7384REUSE API50Link type unknownreuse.softwareOther opportunitiesFreeModerateHighLive, conditionalMake 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 pagesOpen REUSE API submit page (new tab)REUSE API details
7484Splunkbase90Link type unknownsplunk.comMarketplaces and app storesFreeModerateHighLive, conditionalBuild 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.2026-08-03Open Splunkbase submit page (new tab)Splunkbase details
7584Spotify for Creators95Nofollowcreators.spotify.comOther opportunitiesFreeModerateHighLive, conditionalHost 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.2026-08-05Open Spotify for Creators submit page (new tab)Spotify for Creators details
7684Swagger Studio75Nofollowapp.swaggerhub.comOther opportunitiesFreeModerateHighLive, conditionalPublish 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.htmlOpen Swagger Studio submit page (new tab)Swagger Studio details
7784TODO Group OSPO Landscape55Link type unknowntodogroup.orgSoftware directoriesFreeModerateHighLive, conditionalCreate 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 documentationOpen TODO Group OSPO Landscape submit page (new tab)TODO Group OSPO Landscape details
7884Vercel Integrations Marketplace90Link type unknownvercel.comMarketplaces and app storesFreeModerateHighLive, conditionalBuild 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-integrationOpen Vercel Integrations Marketplace submit page (new tab)Vercel Integrations Marketplace details
7984Xero App Store85Nofollowdeveloper.xero.comMarketplaces and app storesFreeModerateHighLive, conditionalBuild 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.pdfOpen Xero App Store submit page (new tab)Xero App Store details
8083MCP.so50Link type unknownmcp.soOther opportunitiesFree + paid tierQuickHighLive, conditionalSubmit 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.2026-08-04Open MCP.so submit page (new tab)MCP.so details
8181AI Verify Foundation35Link type unknownaiverifyfoundation.sgOther opportunitiesFreeInvolvedHighLive, conditionalRun 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.2026-08-04Open AI Verify Foundation submit page (new tab)AI Verify Foundation details
8281Apple Podcasts for Creators100Nofollowpodcasters.apple.comOther opportunitiesFree + paid tierModerateHighLive, conditionalSubmit 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.2026-08-05Open Apple Podcasts for Creators submit page (new tab)Apple Podcasts for Creators details
8381JetBrains Marketplace90Nofollowplugins.jetbrains.comMarketplaces and app storesFree + paid tierModerateHighLive, conditionalBuild and upload a useful your tool IntelliJ-platform plugin with vendor, license, source, support and compatibility links.Every plugin is reviewed and must pass compatibility, security and privacy checks; no promotional shell.2026-08-04Open JetBrains Marketplace submit page (new tab)JetBrains Marketplace details
8481Luma80Nofollowluma.comOther opportunitiesFree + paid tierModerateHighLive, conditionalPublish a real your tool webinar, demo or workshop with a contextual canonical link in its event details.Event details and host identity must be genuine; do not create empty or duplicate promotional events.2026-08-05Open Luma submit page (new tab)Luma details
8581Pabbly Connect Developer60Link type unknownpabbly.comMarketplaces and app storesFree + paid tierModerateHighLive, conditionalBuild a working your tool connector with useful triggers or actions and submit it for the Pabbly Connect integration catalog.Requires REST API knowledge, a functioning integration and Pabbly best-practice review; do not create an empty listing.2026-08-05Open Pabbly Connect Developer submit page (new tab)Pabbly Connect Developer details
8678Guestio50Link type unknownguestio.comMarketplaces and app storesFree + paid tierInvolvedHighLive, conditionalClaim a free account, complete a credible founder guest profile, and pursue relevant podcast, newsletter, or blog interviews.Earn mentions through real interviews; do not pay hosts for undisclosed editorial coverage or send bulk pitches.2026-08-05Open Guestio submit page (new tab)Guestio details
8778Podnews70Sometimes dofollowpodnews.netPR and source platformsFree + paid tierInvolvedHighLive, conditionalEmail a genuinely newsworthy your tool podcast or audio-tool launch story with concise facts, human artwork, and release timing.No paid guest posts or link insertions; coverage is selective and only relevant to podcasting or on-demand audio.2026-08-05Open Podnews submit page (new tab)Podnews details
8868Apify Store70Nofollowapify.comMarketplaces and app storesFreeQuickMediumLive, conditionalBuild a working your tool automation Actor, publish it to the Store and include contextual project/documentation links.Actor must perform a real automation use case, meet Store quality/security rules and avoid unauthorized scraping or data use.https://docs.apify.com/actors/publishingOpen Apify Store submit page (new tab)Apify Store details
8968AppImageHub50Link type unknownappimage.github.ioSoftware directoriesFreeQuickMediumLive, conditionalPackage a legitimate your tool desktop app as an official AppImage, then file the requested issue or pull request for inclusion.Requires a maintained downloadable AppImage and compliant metadata; a browser-only site is not eligible.2026-08-05Open AppImageHub submit page (new tab)AppImageHub details
9068Astro Showcase70Link type unknownastro.buildDesign galleriesFreeQuickMediumLive, conditionalIf an your tool property genuinely uses Astro, use the Submit site action to propose it for the public showcase.Only submit an actual Astro-built production site; acceptance is curated and not guaranteed.2026-08-05Open Astro Showcase submit page (new tab)Astro Showcase details
9168Cloudsmith60Link type unknowncloudsmith.comDeveloper registriesFreeQuickMediumLive, conditionalCreate a public your tool package repository for genuine releases and complete its namespace, description, licence and source/homepage metadata.Only host real maintained artifacts; the open-source plan requires public licensed software and public distribution can incur usage limits.2026-08-05 official Cloudsmith repository docs and pricingOpen Cloudsmith submit page (new tab)Cloudsmith details
9268CocoaPods75Link type unknowncocoapods.orgDeveloper registriesFreeQuickMediumLive, conditionalPublish a genuine iOS or macOS your tool SDK and set homepage/source URLs in its podspec.Requires a valid podspec and Trunk registration; package must be an actual reusable Apple-platform library.https://guides.cocoapods.org/making/getting-setup-with-trunk.htmlOpen CocoaPods submit page (new tab)CocoaPods details
9368Django Packages60Link type unknowndjangopackages.orgDeveloper registriesFreeQuickMediumLive, conditionalAfter releasing a genuinely Django-relevant open-source component, sign in and add its GitHub or GitLab repository and accurate project links.Package must be useful to Django developers and hosted on a supported public repository; listings are community-maintained and not DSF endorsement.2026-08-05 official Django Packages FAQ, documentation and live directoryOpen Django Packages submit page (new tab)Django Packages details
9468FlakeHub45Link type unknownflakehub.comDeveloper registriesFreeQuickMediumLive, conditionalPublish a genuine versioned your tool Nix flake under the correct GitHub owner and maintain its README and project links.Published versions are archived permanently; ownership, licence and repository association must be accurate and squatting is inappropriate.2026-08-05 official FlakeHub homepage, usage policy and pricingOpen FlakeHub submit page (new tab)FlakeHub details
9568freshcode.club40Link type unknownfreshcode.clubDeveloper registriesFreeQuickMediumLive, conditionalSubmit a real maintained your tool open-source release with accurate categories and project metadata.Use only for an actual open-source project and keep releases maintained.2026-08-05Open freshcode.club submit page (new tab)freshcode.club details
9668Haxelib55Link type unknownlib.haxe.orgDeveloper registriesFreeQuickMediumLive, conditionalRelease a useful Haxe SDK or privacy utility and set haxelib.json's URL to the relevant your tool documentation page.Requires reusable code, semantic versions and accurate metadata; promotional-only packages are not appropriate.2026-08-05 official Haxelib package guideOpen Haxelib submit page (new tab)Haxelib details
9768itch.io90Nofollowitch.ioOther opportunitiesFreeQuickMediumLive, conditionalPublish a genuine browser or desktop your tool utility with screenshots, documentation and an official-site link.Content must be an actual downloadable or browser-run project and follow itch.io quality/content rules; not a generic directory listing.https://itch.io/developersOpen itch.io submit page (new tab)itch.io details
9868Joomla Extensions Directory90Sometimes dofollowjoomla.orgMarketplaces and app storesFreeQuickMediumLive, conditionalBuild a functional your tool Joomla integration and submit a complete listing with an approved download route.Actual installable extension required; GPL, trademark, update-system, security and listing checks apply.2026-08-05 official JED submission guide and entry checklistOpen Joomla Extensions Directory submit page (new tab)Joomla Extensions Directory details
9968Liberapay65Nofollowliberapay.comProfiles and entitiesFreeQuickMediumLive, conditionalCreate an your tool project team, connect verified project accounts, and describe the official website and repository contextually.Teams are for genuine shared projects; one-contributor projects are allowed, but a single-company shell is not the intended use.2026-08-05Open Liberapay submit page (new tab)Liberapay details
10068OpenTofu Public Registry50Link type unknownregistry.opentofu.orgDeveloper registriesFreeQuickMediumLive, conditionalRelease a reusable your tool-related security or privacy module from a correctly named public GitHub repository.Requires standard module structure, terraform-NAME-TARGETSYSTEM naming and semantic Git tags; confirm external homepage display before investing.2026-08-05 official OpenTofu module publishing guideOpen OpenTofu Public Registry submit page (new tab)OpenTofu Public Registry 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.

  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.

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 view

An 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

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.