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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 | 86 | Activepieces Community Pieces | 50 | Link type unknown | activepieces.com | Communities and forums | Free | Quick | High | Not submitted | Build and test a useful your tool piece with real actions, publish the package under a unique organization scope, and maintain version compatibility. | Users install community pieces through My Pieces; package publication alone does not guarantee central-directory promotion or a followed backlink. | 2026-08-03 | Open Activepieces Community Pieces submit page (new tab)Activepieces Community Pieces details |
| 2 | 84 | Cloudron Community Apps | 60 | Link type unknown | cloudron.io | Communities and forums | Free | Moderate | High | Verified live | Package a secure self-hosted your app for Cloudron, publish its version catalog and documentation, then request inclusion in Community Apps. | Must support Cloudron's read-only filesystem, backups, updates, health checks, manifest fields, and publicly hosted version catalog; community apps are not reviewed by Cloudron. | Official Cloudron packaging and publishing documentation checked 2026-08-05 | Open Cloudron Community Apps submit page (new tab)Cloudron Community Apps details |
| 3 | 84 | Hackaday.io | 85 | Nofollow | hackaday.io | Communities and forums | Free | Moderate | High | Verified live | Document a real hardware, privacy or security build that uses your tool, including schematics, progress logs and a natural official-project link. | Projects should document genuine work and follow community conduct; advertising-only pages and repetitive link posts are inappropriate. | 2026-08-03 | Open Hackaday.io submit page (new tab)Hackaday.io details |
| 4 | 84 | Kaggle | 90 | Nofollow | kaggle.com | Communities and forums | Free | Moderate | High | Live, conditional | Publish 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/datasets | Open Kaggle submit page (new tab)Kaggle details |
| 5 | 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 |
| 6 | 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 |
| 7 | 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 |
| 8 | 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 |
| 9 | 81 | Instructables | 90 | Nofollow | instructables.com | Communities and forums | Free | Involved | High | Verified live | Publish a detailed build or usage tutorial around an original your tool workflow, with the relevant tool link only where it helps readers. | Commercial projects are acceptable only when the article is genuinely instructional; include original steps, images, and results. | https://www.instructables.com/create/ | Open Instructables submit page (new tab)Instructables details |
| 10 | 80 | Workato Community Library | 75 | Link type unknown | workato.com | Communities and forums | Not stated | Moderate | High | Live, conditional | Build a tested Workato connector for legitimate your tool triggers and actions, add clear support and usage documentation, publish it to the community library, and provide simple successful community recipes. | The connector must pass Workato review and accept the developer agreement. Remove secrets, accurately choose open- or closed-source visibility, provide support contact details, meaningful tags and docs, test every action and trigger, and maintain shared versions; do not publish a promotional shell. | 2026-08-03 | Open Workato Community Library submit page (new tab)Workato Community Library details |
| 11 | 74 | data.world | 75 | Nofollow | data.world | Communities and forums | Paid | Moderate | High | Verified live | Publish a documented synthetic privacy, redaction, accessibility, or scam-detection benchmark dataset. | Use an appropriate licence and rich metadata; never publish proprietary, copyrighted, sensitive, or personal data. | Official data.world dataset creation documentation checked 2026-08-07 | Open data.world submit page (new tab)data.world details |
| 12 | 68 | Ghost Forum | 85 | Nofollow | forum.ghost.org | Communities and forums | Free | Quick | Medium | Not submitted | Post how to embed your tool calculators in Ghost after /embed live. | Forum post only; directory closed to submissions. | 2026-07-30 | Open Ghost Forum submit page (new tab)Ghost Forum details |
| 13 | 68 | n8n Community | 75 | Link type unknown | n8n.io | Communities and forums | Free | Quick | Medium | Needs checking | Publish useful n8n workflow linking your tool resources. | AltFTool already has n8n content; good fit. | 2026-07-30 | Open n8n Community submit page (new tab)n8n Community details |
| 14 | 66 | Android Enthusiasts | 80 | Nofollow | android.stackexchange.com | Communities and forums | Free | Moderate | Medium | Needs checking | Answer Android questions properly and add your site to your profile. | Same Stack Exchange rules: disclose affiliation and keep answers self-contained. | Added 2026-11-01 | Open Android Enthusiasts submit page (new tab)Android Enthusiasts details |
| 15 | 66 | Ask Different | 80 | Nofollow | apple.stackexchange.com | Communities and forums | Free | Moderate | Medium | Needs checking | Answer Mac and iPhone questions in full, linking your own page only when it adds detail the answer cannot hold. | Disclose that you own the linked site; link-only answers are removed. | Added 2026-11-01 | Open Ask Different submit page (new tab)Ask Different details |
| 16 | 66 | 95 | Nofollow | reddit.com | Communities and forums | Free | Moderate | Medium | Not submitted | Post to relevant subs with context: SideProject, SaaS, webdev. | Respect subreddit rules; 90/10 self-promo; no spam/comments. | 2026-07-30 | Open Reddit submit page (new tab)Reddit details | |
| 17 | 66 | Spiceworks Community | 80 | Nofollow | community.spiceworks.com | Communities and forums | Free | Moderate | Medium | Needs checking | A good fit for IT and admin tools: answer IT pro questions and fill in your vendor or personal profile. | Vendors must disclose themselves; sales pitches are not welcome. | Added 2026-11-01 | Open Spiceworks Community submit page (new tab)Spiceworks Community details |
| 18 | 66 | TrueNAS Apps Market | 60 | Link type unknown | apps.truenas.com | Communities and forums | Free | Moderate | Medium | Verified live | Create a secure Docker Compose-based your tool self-hosted deployment, test it against TrueNAS app tooling and submit it to the official community catalog with useful documentation/resources. | Requires a real containerized app, local validation, maintained versions and clear storage/network/security settings; community apps are independently supported and contributions go through repository review. | 2026-08-05 | Open TrueNAS Apps Market submit page (new tab)TrueNAS Apps Market details |
| 19 | 64 | HackerOne Bug Bounty Platform | 85 | Nofollow | hackerone.com | Communities and forums | Not stated | Quick | Medium | Not submitted | After security readiness, launch a properly scoped public VDP or bounty program with safe-harbor language, assets, response SLAs and funded rewards where applicable. | This is a security program, not an SEO tactic; requires mature triage and remediation, and public profile links may be nofollow or otherwise platform-controlled. | 2026-08-03 | Open HackerOne Bug Bounty Platform submit page (new tab)HackerOne Bug Bounty Platform details |
| 20 | 63 | Hackster.io | 80 | Nofollow | hackster.io | Communities and forums | Free | Involved | Medium | Verified live | Publish a detailed hardware or IoT project that genuinely uses your tool, with code, parts, instructions and an external tutorial link where useful. | Hardware-specific; sales pitches and non-project blog posts are prohibited, and discoverable projects must be complete. | Official Hackster project docs checked 2026-07-30 | Open Hackster.io submit page (new tab)Hackster.io details |
| 21 | 63 | js13kGames | 50 | Link type unknown | js13kgames.com | Communities and forums | Free | Involved | Medium | Needs checking | Enter the yearly competition with a web game that fits in 13 kB zipped; each entry gets a page linking to your source and profile. | Runs once a year from mid-August to mid-September; strict size limit and no external libraries or services. | Added 2026-11-01 | Open js13kGames submit page (new tab)js13kGames details |
| 22 | 63 | Meetup | 90 | Nofollow | meetup.com | Communities and forums | Free + paid tier | Moderate | Medium | Live, conditional | Run a genuine privacy, online-tools or accessibility community and reference your tool only where it supports the group or event. | Requires an active group and real events; Starter limits attendance and frequency, and organizer plans auto-renew. | 2026-08-05 | Open Meetup submit page (new tab)Meetup details |
| 23 | 48 | Airtable Universe | 90 | Nofollow | airtable.com | Communities and forums | Free | Quick | Later | Needs checking | Publish backlink tracker/content calendar template. | Needs useful Airtable base/template. | 2026-07-30 | Open Airtable Universe submit page (new tab)Airtable Universe details |
| 24 | 48 | Cursor Forum | 70 | Nofollow | forum.cursor.com | Communities and forums | Free | Quick | Later | Needs checking | Share tools or extensions that work with Cursor in the showcase area. | Keep posts relevant to Cursor users. | Added 2026-11-01 | Open Cursor Forum submit page (new tab)Cursor Forum details |
| 25 | 48 | Elixir Forum | 55 | Nofollow | elixirforum.com | Communities and forums | Free | Quick | Later | Needs checking | Announce your Elixir library or project in the libraries category. | Keep posts technical and stay to answer questions. | Added 2026-11-01 | Open Elixir Forum submit page (new tab)Elixir Forum details |
| 26 | 48 | IndieWeb Wiki | 65 | Nofollow | indieweb.org | Communities and forums | Free | Quick | Later | Needs checking | Sign in with your domain to create a user page and document how your site works. | Wiki edits must be factual and on-topic. | Added 2026-11-01 | Open IndieWeb Wiki submit page (new tab)IndieWeb Wiki details |
| 27 | 48 | Laravel.io | 55 | Nofollow | laravel.io | Communities and forums | Free | Quick | Later | Needs checking | Write a technical article or answer forum threads, and link your site in your profile. | Articles are moderated; promotional content is rejected. | Added 2026-11-01 | Open Laravel.io submit page (new tab)Laravel.io details |
| 28 | 48 | MacRumors Forums | 80 | Nofollow | forums.macrumors.com | Communities and forums | Free | Quick | Later | Needs checking | Post your Mac or iOS app in the developer-allowed app sections. | Self-promotion is restricted to specific forums. | Added 2026-11-01 | Open MacRumors Forums submit page (new tab)MacRumors Forums details |
| 29 | 48 | OpenAI Developer Community | 90 | Nofollow | community.openai.com | Communities and forums | Free | Quick | Later | Needs checking | Share what you built with the OpenAI API in the community showcase category and answer questions. | Promotional posts outside showcase areas are removed. | Added 2026-11-01 | Open OpenAI Developer Community submit page (new tab)OpenAI Developer Community details |
| 30 | 48 | Python Discourse | 90 | Nofollow | discuss.python.org | Communities and forums | Free | Quick | Later | Needs checking | Discuss your Python packaging or tooling project in the relevant category. | Focus is on Python itself; pure product promotion is off-topic. | Added 2026-11-01 | Open Python Discourse submit page (new tab)Python Discourse details |
| 31 | 48 | Rust Users Forum | 80 | Nofollow | users.rust-lang.org | Communities and forums | Free | Quick | Later | Needs checking | Share your Rust crate or tool in the announcements category. | Off-topic or commercial spam is removed. | Added 2026-11-01 | Open Rust Users Forum submit page (new tab)Rust Users Forum details |
| 32 | 48 | Swift Forums | 80 | Nofollow | forums.swift.org | Communities and forums | Free | Quick | Later | Needs checking | Announce open-source Swift packages in the related projects area. | Keep it technical and relevant to Swift. | Added 2026-11-01 | Open Swift Forums submit page (new tab)Swift Forums details |
| 33 | 48 | V2EX | 70 | Nofollow | v2ex.com | Communities and forums | Free | Quick | Later | Needs checking | Share your project in the creation-sharing node with a Chinese description. | Promotion outside allowed nodes leads to deletion. | Added 2026-11-01 | Open V2EX submit page (new tab)V2EX details |
| 34 | 46 | Accessibility Stack Exchange | 80 | Nofollow | accessibility.stackexchange.com | Communities and forums | Free | Moderate | Later | Needs checking | Answer accessibility questions where you have real expertise and link your profile to your site. | Small community; obvious promotion stands out and is removed. | Added 2026-11-01 | Open Accessibility Stack Exchange submit page (new tab)Accessibility Stack Exchange details |
| 35 | 46 | AppleVis | 55 | Link type unknown | applevis.com | Communities and forums | Free | Moderate | Later | Needs checking | If your app works well with VoiceOver, add it to the app directory or share it in the forum. | Only relevant for genuinely accessible Apple apps; the community tests claims. | Added 2026-11-01 | Open AppleVis submit page (new tab)AppleVis details |
| 36 | 46 | Ask Ubuntu | 80 | Nofollow | askubuntu.com | Communities and forums | Free | Moderate | Later | Needs checking | Help Ubuntu users with complete answers and keep your site link on your profile. | Answers have to stand on their own; promotional posts get flagged quickly. | Added 2026-11-01 | Open Ask Ubuntu submit page (new tab)Ask Ubuntu details |
| 37 | 46 | BleepingComputer Forums | 90 | Nofollow | bleepingcomputer.com | Communities and forums | Free | Moderate | Later | Needs checking | Join, help with tech support threads and add your site to your profile where allowed. | Strict moderation; link drops in threads count as spam. | Added 2026-11-01 | Open BleepingComputer Forums submit page (new tab)BleepingComputer Forums details |
| 38 | 46 | ElevenForum | 50 | Link type unknown | elevenforum.com | Communities and forums | Free | Moderate | Later | Needs checking | Help Windows 11 users and keep your site on your profile. | New accounts posting links are often held for review. | Added 2026-11-01 | Open ElevenForum submit page (new tab)ElevenForum details |
| 39 | 46 | Juejin | 75 | Nofollow | juejin.cn | Communities and forums | Free | Moderate | Later | Needs checking | Write a Chinese-language technical post about your tool or open-source project. | Pure ads are removed; quality posts are recommended. | Added 2026-11-01 | Open Juejin submit page (new tab)Juejin details |
| 40 | 46 | Linus Tech Tips Forum | 60 | Link type unknown | linustechtips.com | Communities and forums | Free | Moderate | Later | Needs checking | Join the community, answer questions and add your site to your profile. | Advertising has its own rules; read them before linking. | Added 2026-11-01 | Open Linus Tech Tips Forum submit page (new tab)Linus Tech Tips Forum details |
| 41 | 46 | Tech Support Guy | 60 | Link type unknown | techguy.org | Communities and forums | Free | Moderate | Later | Needs checking | Help people with computer problems and add a website link to your profile. | Signature links usually need a post history first. | Added 2026-11-01 | Open Tech Support Guy submit page (new tab)Tech Support Guy details |
| 42 | 46 | TechPowerUp Forums | 75 | Link type unknown | techpowerup.com | Communities and forums | Free | Moderate | Later | Needs checking | Take part in hardware threads and add your site to your profile. | Profile links only; no thread spam. | Added 2026-11-01 | Open TechPowerUp Forums submit page (new tab)TechPowerUp Forums details |
| 43 | 46 | Ten Forums | 55 | Link type unknown | tenforums.com | Communities and forums | Free | Moderate | Later | Needs checking | Answer Windows 10 questions and list your site on your profile. | No advertising in threads. | Added 2026-11-01 | Open Ten Forums submit page (new tab)Ten Forums details |
| 44 | 46 | Tom's Guide Forums | 90 | Nofollow | forums.tomsguide.com | Communities and forums | Free | Moderate | Later | Needs checking | Help with consumer tech questions and list your website on your profile. | Shares rules with Tom's Hardware: no promotional posts. | Added 2026-11-01 | Open Tom's Guide Forums submit page (new tab)Tom's Guide Forums details |
| 45 | 46 | Tom's Hardware Forums | 90 | Nofollow | tomshardware.com | Communities and forums | Free | Moderate | Later | Needs checking | Contribute to hardware threads and keep your site on your profile. | Self-promotion outside profile fields is removed. | Added 2026-11-01 | Open Tom's Hardware Forums submit page (new tab)Tom's Hardware Forums details |
| 46 | 46 | Unix & Linux Stack Exchange | 80 | Nofollow | unix.stackexchange.com | Communities and forums | Free | Moderate | Later | Needs checking | Answer shell and Linux questions and put your site on your profile. | Disclose any link to your own work. | Added 2026-11-01 | Open Unix & Linux Stack Exchange submit page (new tab)Unix & Linux Stack Exchange details |
| 47 | 46 | XDA Forums | 80 | Nofollow | xdaforums.com | Communities and forums | Free | Moderate | Later | Needs checking | Start a thread for your Android app in the right section and support users there. | Follow the section rules for app threads; no spam bumping. | Added 2026-11-01 | Open XDA Forums submit page (new tab)XDA Forums details |
| 48 | 43 | Global Game Jam | 65 | Link type unknown | globalgamejam.org | Communities and forums | Free | Involved | Later | Needs checking | Take part in the yearly jam through a local or online site and upload your game to get a public game page. | Held once a year, usually in January; you register through a jam site. | Added 2026-11-01 | Open Global Game Jam submit page (new tab)Global Game Jam details |
| 49 | 43 | Habr | 85 | Sometimes dofollow | habr.com | Communities and forums | Free | Involved | Later | Needs checking | Publish an in-depth technical article in Russian and link your project where relevant. | Moderated; advertising requires a company blog. | Added 2026-11-01 | Open Habr submit page (new tab)Habr details |
| 50 | 43 | Ludum Dare | 60 | Link type unknown | ldjam.com | Communities and forums | Free | Involved | Later | Needs checking | Make a game during a Ludum Dare event and publish your entry page with a playable web build link. | Only during scheduled events; Compo and Jam rules differ on team size and assets. | Added 2026-11-01 | Open Ludum Dare submit page (new tab)Ludum Dare 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.