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A maintained list of 1,854 legitimate backlink sites: directories, profile creation sites, guest posting sites, launch platforms, registries and marketplaces. 1,532 are free or have a free tier, 44 usually give a dofollow link, and 772 have an estimated DA of 70 or more. Every row shows authority, link type, cost and effort, and links straight to the submit page.
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 84 | Bioconductor | 75 | Link type unknown | bioconductor.org | Review platforms | Free | Moderate | High | Verified live | If your tool ships a legitimate genomics or bioinformatics utility, package it for R with complete vignettes and submit it for review. | Only in-scope, scientifically useful and maintainable packages qualify; peer review and continuous checks apply. | 2026-08-03 | Open Bioconductor submit page (new tab)Bioconductor details |
| 2 | 81 | GeeksforGeeks Contribute | 90 | Nofollow | geeksforgeeks.org | Review platforms | Free | Involved | High | Verified live | Write an original technical article about a broadly useful browser-security, privacy, or accessibility technique and cite your tool only when it is a necessary working example. | Articles are submitted for review and promotional, incorrect, or plagiarized work can be rejected. Use original code and images, disclose affiliation, and do not turn the article into an AltFTool sales page. Review timing, publication, author-page visibility, and rel/follow behavior are not guaranteed. | 2026-08-03 | Open GeeksforGeeks Contribute submit page (new tab)GeeksforGeeks Contribute details |
| 3 | 81 | LottieFiles | 80 | Nofollow | lottiefiles.com | Review platforms | Free + paid tier | Moderate | High | Verified live | Publish original your tool privacy, safety, or accessibility micro-animations as a coherent creator collection, with a contextual project link where the profile permits it. | Public uploads are reviewed and use the Lottie Simple License; upload only original rights-cleared work and avoid duplicate promotional variants. | Official LottieFiles public upload, limits, and licensing guidance checked 2026-08-07 | Open LottieFiles submit page (new tab)LottieFiles details |
| 4 | 77 | Codemotion Magazine | 60 | Link type unknown | codemotion.com | Review platforms | Not stated | Involved | High | Verified live | Pitch a practical privacy-tool engineering article, code walkthrough, or review grounded in your tool implementation experience. | Only original useful content is accepted; sales pitches, press releases, and commercially driven copy are explicitly rejected. | Official Codemotion contributor guidance checked 2026-08-07 | Open Codemotion Magazine submit page (new tab)Codemotion Magazine details |
| 5 | 71 | Nullcon | 55 | Link type unknown | nullcon.net | Review platforms | Paid | Involved | High | Not submitted | Develop original, defensible research around AI-agent abuse, prompt injection, document forensics, scam detection, or privacy engineering and submit a demo-backed talk in the next cycle. | Nullcon prioritizes original research, technical depth, evidence, practical defensive value, and reproducibility; product pitches and recycled decks are not accepted. Berlin 2026 CFP closed 2026-07-12. | 2026-08-03 | Open Nullcon submit page (new tab)Nullcon details |
| 6 | 66 | ADPList | 60 | Nofollow | adplist.org | Review platforms | Free | Moderate | Medium | Verified live | Apply only if the founder or team member has real design/engineering leadership experience and intends to provide genuine mentoring, then add an accurate personal website/profile reference. | Mentor approval criteria apply and a public profile must represent a real person, expertise, availability, and service—not a company backlink. Deliver actual mentorship and disclose AltFTool affiliation. Acceptance timing, profile discovery, external-link display, and rel/follow status are not guaranteed. | 2026-08-03 | Open ADPList submit page (new tab)ADPList details |
| 7 | 66 | MentorCruise | 55 | Link type unknown | mentorcruise.com | Review platforms | Free | Moderate | Medium | Verified live | Have a qualified founder or senior team member apply as a privacy, accessibility, product, or engineering mentor and add your tool only as truthful experience/personal-site evidence. | Applications are manually reviewed, typically within 14 days, and official help says fewer than 10% are accepted; a real headshot, bio, LinkedIn, and relevant expertise are required. The profile must support actual paid mentoring, not link placement. External links are profile UGC with no approval, traffic, or followed-link guarantee. | 2026-08-03 | Open MentorCruise submit page (new tab)MentorCruise details |
| 8 | 66 | Nmap NSE Documentation | 80 | Link type unknown | nmap.org | Review platforms | Free | Moderate | Medium | Verified live | Develop a safe, useful Nmap NSE script related to an your tool security check and include accurate author or homepage metadata. | Script must be original, valuable, documented, tested, properly licensed, and accepted into Nmap; never add intrusive behavior merely for exposure. | 2026-08-05 — https://nmap.org/book/nse-script-format.html | Open Nmap NSE Documentation submit page (new tab)Nmap NSE Documentation details |
| 9 | 66 | ProjectDiscovery Nuclei Templates | 60 | Link type unknown | projectdiscovery.io | Review platforms | Free | Moderate | Medium | Verified live | Create high-confidence defensive templates for authorized checks of privacy leaks or misconfigurations, include safe matchers and test evidence, then submit them for review. | Authorized defensive use only; avoid intrusive actions, require reproducible evidence, minimize false positives, follow severity and metadata rules, and provide safe testing. | Official Nuclei template creation guide and contribution repository checked 2026-08-05 | Open ProjectDiscovery Nuclei Templates submit page (new tab)ProjectDiscovery Nuclei Templates details |
| 10 | 65 | REVIEWS.io | 75 | Sometimes dofollow | reviews.io | Review platforms | Free + paid tier | Quick | Medium | Needs checking | Claim your company page and invite real customers to leave reviews. | Incentivised or fake reviews are against policy. | Added 2026-11-01 | Open REVIEWS.io submit page (new tab)REVIEWS.io details |
| 11 | 63 | Trustpilot | 95 | Nofollow | trustpilot.com | Review platforms | Free + paid tier | Moderate | Medium | Not submitted | Claim business profile for your tool. | Review link value mostly brand/reputation. | 2026-07-30 | Open Trustpilot submit page (new tab)Trustpilot details |
| 12 | 62 | PoPETs / PETS | 60 | Link type unknown | petsymposium.org | Review platforms | Not stated | Moderate | Medium | Verified live | Submit novel privacy-technology research plus a reproducibility artifact that links to its public implementation. | Strict novelty, ethics, anonymization and AI policies; artifact link appears only after review and acceptance. | 2026-08-05 — https://petsymposium.org/cfp27.php | Open PoPETs / PETS submit page (new tab)PoPETs / PETS details |
| 13 | 46 | CoMSES Computational Model Library | 50 | Link type unknown | comses.net | Review platforms | Free | Moderate | Later | Verified live | Publish a documented social, ecological, or computational model with source, narrative documentation, contributors, and reproducibility metadata. | Only genuine computational models qualify; optional peer review and DOI require stronger documentation and reproducibility. | Official CoMSES publishing guide and FAQ checked 2026-08-05 | Open CoMSES Computational Model Library submit page (new tab)CoMSES Computational Model Library details |
| 14 | 46 | nf-core | 50 | Link type unknown | nf-co.re | Review platforms | Free | Moderate | Later | Verified live | Propose and contribute a standards-compliant your tool-related bioinformatics privacy module, subworkflow, or full Nextflow pipeline. | Must solve a real bioinformatics need, avoid overlap, use nf-core templates, include tests and docs, pass linting, review, and maintenance expectations. | 2026-08-05 — https://nf-co.re/docs/contributing/overview | Open nf-core submit page (new tab)nf-core details |
| 15 | 46 | SoftwareReviews | 65 | Sometimes dofollow | softwarereviews.com | Review platforms | Free | Moderate | Later | Needs checking | Claim your vendor profile and invite verified users to review your software. | Reviews are vetted; vendors cannot edit or remove them. | Added 2026-11-01 | Open SoftwareReviews submit page (new tab)SoftwareReviews details |
| 16 | 46 | The Manifest | 65 | Sometimes dofollow | themanifest.com | Review platforms | Free | Moderate | Later | Needs checking | Service businesses can create a profile, which is shared with Clutch, and collect verified reviews. | Reviews are verified through interviews; only service providers fit. | Added 2026-11-01 | Open The Manifest submit page (new tab)The Manifest details |
| 17 | 46 | Visual Objects | 60 | Sometimes dofollow | visualobjects.com | Review platforms | Free | Moderate | Later | Needs checking | Creative and design agencies can create a profile and add portfolio items. | Shared with the Clutch network; reviews are verified. | Added 2026-11-01 | Open Visual Objects submit page (new tab)Visual Objects details |
| 18 | 45 | Agency Spotter | 55 | Sometimes dofollow | agencyspotter.com | Review platforms | Free + paid tier | Quick | Later | Needs checking | Claim or create an agency profile with services, case studies and website. | Profiles must represent real agencies. | Added 2026-11-01 | Open Agency Spotter submit page (new tab)Agency Spotter details |
| 19 | 45 | ProductReview.com.au | 75 | Nofollow | productreview.com.au | Review platforms | Free + paid tier | Quick | Later | Needs checking | If you sell in Australia, request a listing and respond to customer reviews. | Review solicitation must follow their guidelines. | Added 2026-11-01 | Open ProductReview.com.au submit page (new tab)ProductReview.com.au details |
| 20 | 43 | AppFutura | 55 | Sometimes dofollow | appfutura.com | Review platforms | Free + paid tier | Moderate | Later | Needs checking | App development firms can create a profile with portfolio and client reviews. | Premium tiers improve ranking; reviews are verified. | Added 2026-11-01 | Open AppFutura submit page (new tab)AppFutura details |
| 21 | 43 | ProvenExpert | 75 | Nofollow | provenexpert.com | Review platforms | Free + paid tier | Moderate | Later | Not submitted | Create business profile linking site. | Mostly reputation/profile backlink. | 2026-07-30 | Open ProvenExpert submit page (new tab)ProvenExpert details |
| 22 | 43 | Qeios | 50 | Link type unknown | qeios.com | Review platforms | Free + paid tier | Moderate | Later | Verified live | Post a substantive study of privacy-preserving browser tools or redaction reliability with transparent methods and data. | Research only; promotional content is forbidden, conflicts are public, and DOI versions are permanent. Never buy Pro solely for a link. | 2026-08-05 — https://www.qeios.com/publishing-policy | Open Qeios submit page (new tab)Qeios details |
| 23 | 43 | Sitejabber | 85 | Nofollow | sitejabber.com | Review platforms | Free + paid tier | Moderate | Later | Not submitted | Claim business profile. | Reputation link; no spam reviews. | 2026-07-30 | Open Sitejabber submit page (new tab)Sitejabber details |
| 24 | 43 | Techreviewer | 50 | Sometimes dofollow | techreviewer.co | Review platforms | Free + paid tier | Moderate | Later | Needs checking | Create a company profile and gather verified client reviews for your dev or IT services. | Reviews are checked; paid plans boost visibility. | Added 2026-11-01 | Open Techreviewer submit page (new tab)Techreviewer details |
Four steps that work for a new site, a SaaS or a side project. No paid link packages, nothing that risks a penalty.
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.
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.
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.
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
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.
One-shot launches where timing and preparation decide the outcome.
Publications that accept contributed articles. Slow and editorial, but the links are earned.
Fast-growing listings specifically for AI-powered tools.
Extension, plugin and integration stores. Real review processes, real distribution.
Startup listings, beta lists and founder media.
General tool and software catalogues with real search traffic.
B2B review sites. Slow to approve, strong once live.
Package, image and docs hosting that carries real authority.
Showcases judged on craft. A good screenshot matters more than copy.
Write once, link back. Editorial standards vary widely.
Get quoted or distribute a release. Slower, higher ceiling.
Company and local listings. Unglamorous, consistently indexed.
Owned pages you control: company, founder, knowledge-panel entities.
Answer real questions. Never drop a bare link.
Brand surface and referral traffic more than link equity.
Everything that does not fit the buckets above.