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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.
Free, one short form, strongest sites first. No paid tier needed.
google.com
github.com
toolhub.wikimedia.org
wordpress.org
flickr.com
patreon.com
Create an account and submit an article on big data, AI or emerging technology for editorial review.
Create a policy-compliant Debian package for your stable useful CLI, file the appropriate intent-to-package request, include accurate upstream metadata and secure a Debian sponsor for upload.
Submit a design or architecture project through their DIY submission tool with images and text.
Share design/tool launch if genuinely useful.
Request writer access and submit coding tutorials or engineering write-ups through Medium.
Publish or cross-post articles with a canonical link to your original.
Publish a useful D client library or privacy utility with accurate homepage and repository metadata in dub.json or dub.sdl.
Help Windows 11 users and keep your site on your profile.
Publish an Elm package with docs and a repository link.
Apply to write for the publication and submit startup or founder lessons through Medium.
Submit only after your tool releases a signed Windows desktop utility.
Register as a member and publish blog posts on fintech, payments or banking technology.
Create a seller profile and gigs that describe services you really offer.
Document a project that uses notable typography and credit your site or studio.
Build the founder/company profile and add accurate your tool links, stage and product details.
Create your truthful /founder profile or content page and add the website link where allowed.
Create and thoroughly test a FreeBSD port for your stable CLI or desktop utility, include its canonical project website in WWW metadata and submit the patch through FreeBSD Bugzilla.
Become a contributor and upload vectors, photos or templates.
Build a tested Galaxy wrapper for your medical-data privacy or de-identification workflow and publish it in the main ToolShed.
Create an account and publish a member blog on game development, tools or postmortems.
Make a creator profile and publish your game with links to your site.
Enter the yearly Gamedev.js Jam or send your web game or article for their HTML5 game dev newsletter.
Create a developer account, upload your HTML5 game and let it be syndicated to partner game sites, with your studio named on the listing.
Register as a developer, upload your HTML5 game and integrate their SDK so it can be distributed to partner sites.
Submit an HTML5 game through their developer programme to have it listed and distributed with a studio credit.
Create a brand or artist channel, upload GIFs and apply for verification.
Create an account, add a profile link and optionally mirror an open-source repo.
Deploy a static docs or project site from a GitLab repository and link to your main site.
Submit the company profile with logo, industry, stage, location and official your tool URL.
Create a Hive account and publish posts in relevant communities, linking to your own content where useful.
Submit your tool (or its blog/feed where required) under productivity, privacy or developer tools.
Add your Hugo theme following the theme repository submission steps.
Submit new your tool feature/platform launch.
Submit your tool (or its blog/feed where required) under productivity, privacy or developer tools.
Submit your tool (or its blog/feed where required) under productivity, privacy or developer tools.
Add your indie game, post updates and link your studio site.
Develop a stable ioBroker adapter for your credible privacy/security API, publish the npm package, test it with users and request inclusion in the official latest repository.
Send creative work for possible editorial coverage.
Submit your SaaS product for a profile with pricing and feature data.
Add your static site generator or headless CMS through a pull request to their GitHub repo.
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.