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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
Apply for a profile only if your tool is operated by a scalable high-tech startup incorporated and headquartered in Switzerland.
Submit curated early-stage company listing.
Submit your startup story with founding background, product and traction details.
Submit an article proposal on testing, QA or agile delivery to the editors through the site.
Design your API and publish public docs with a link to your product.
Submit your tool (or its blog/feed where required) under productivity, privacy or developer tools.
Publish a static demo or docs site from the command line and link to your main project.
Publish your OpenAPI definition publicly on SwaggerHub with a link to your product docs.
Create one branded Taplink page and add a curated set of your tool product, category and contact links.
Email funding or acquisition news with key facts and a press kit.
Register as a vendor to list your software for Indian business buyers.
Create a company profile and gather verified client reviews for your dev or IT services.
If your tool helps nonprofits or libraries, reach out about their resource articles or partner programme.
Submit your tool with homepage URL, privacy-first positioning, logo, screenshots and accurate pricing.
Create concise startup pitch linking your tool.
Submit your tool founder, website, stage, traction and product details for a permanent public profile.
Submit your tool with homepage URL, privacy-first positioning, logo, screenshots and accurate pricing.
Register your North American manufacturing or industrial company for a free supplier profile.
Create a pro profile for your service business; useful mainly if you sell local services.
Once invited, share thoughtful posts and only link your own work when it fits a discussion.
Open a store for your hardware project and link your site in the store profile.
Software or app development firms can request a company profile.
List your genuine paid B2B product or service, complete the company profile, and provide accurate seller documentation.
List an operational CSIRT, CERT, SOC, ISAC or PSIRT after securing sponsors and passing the community-vote process.
Add startup if revenue/Stripe verification is appropriate.
Contact the editors with a proposal for an in-depth UX article or column based on your professional experience.
Submit your tool with homepage URL, privacy-first positioning, logo, screenshots and accurate pricing.
Submit well-designed your tool pages.
Submit your tool (or its blog/feed where required) under productivity, privacy or developer tools.
Submit your real release to the free weekly launch queue.
Set up a store for software, communities or digital products and link your site.
Write or improve a how-to article where you have real expertise, and cite sources properly.
Claim or add your US business with the same name, address and phone you use everywhere else.
Claim a free basic listing for your Australian business.
Add your Canadian business for free and keep the details in line with your other citations.
Submit AI tool/agent listing.
Submit AI agent/resource if fit.
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.