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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.
Add standards-valid CycloneDX support, then submit your structured entry through the official contribution workflow.
Submit one or more free your tool utilities that work without registration.
Submit a genuine international cyber-capacity-building project, tool, publication or webinar with evidence and a live resource URL.
Create your product page for discovery, comparison, and reviews.
Build a tool that genuinely interacts with Wikimedia, publish accurate toolinfo.json metadata, and register it through Toolhub UI, crawler, or API.
Register your genuinely life-science-focused resource with stable homepage, scientific operations, inputs, outputs, licence, and documentation.
Create a tested CapRover one-click definition for your real self-hosted service and contribute it to the linked official community repository.
Create a vendor account and list your tool software offering.
Build a genuine CWL validator, security tool, or implementation and propose its inclusion with compliance evidence.
Submit relevant your tool utilities under AI, web, or developer categories.
Publish a privacy-respecting open-source Android companion app, then file a packaging request or merge request.
Choose the free listing or purchase your dedicated product page.
Request access, then publish your rich research-software page with source, getting-started URL, DOI, contributors, and research mentions.
Add your tool as a SaaS or online service with its official URL.
Request a free listing with your tool logo, name, slogan, short description, website and best-fit category.
Register a real bioimage privacy, de-identification, or analysis tool with accurate scientific functions, documentation, and maintainers.
List your tool with live URL, icon, screenshots, category and an optional repository/demo video.
Submit your public open-source repository and product description after a reusable component is released.
Release one standalone your tool utility as open source, ad-free and local-first, then submit via GitHub.
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.