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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.
If your tool ships a legitimate genomics or bioinformatics utility, package it for R with complete vignettes and submit it for review.
Build a Bitrise Step that runs your tool secret, privacy, or accessibility checks on explicitly chosen build artifacts.
Build a practical Blender add-on for media privacy, metadata or workflow automation and upload its tested extension package with documentation.
Build your useful privacy or security Caddy module, publish the Go package, then register it for module docs and custom builds.
Build a Canva app that sends chosen design assets to your accessibility, metadata, or privacy check and returns useful results inside Canva.
Add or claim your real podcast in Creator Studio and complete channel, site and episode metadata.
Package your useful service/security monitor as an MKP, create an account, and upload its description, icon and first version.
Package your genuine Windows desktop or CLI release and set project, documentation and package-source URLs.
Ship your real CLI or desktop utility as a tested package with homepage, project and support metadata.
Publish your tested public orb for privacy, secret, or document-safety checks with a homepage URL and usage examples.
Package a secure self-hosted your app for Cloudron, publish its version catalog and documentation, then request inclusion in Community Apps.
Build a current CodeMeta validator, privacy linter, or integration and propose inclusion through the official website repository.
Publish a useful C/C++ SDK or client for your API and contribute its tested recipe to ConanCenter.
Submit a tested recipe for your real package with upstream homepage, source archive, license and tests.
Build a Kafka Connect source or sink that sends only explicitly selected records to your tool privacy or redaction checks and returns structured results.
Create a real designer profile and publish your original UX/accessibility case study with process artifacts, outcomes, and the official project link.
Submit a useful R package with URL and BugReports metadata pointing to its official project and documentation pages.
Create a defensive parser, scenario, or collection for your real -supported log source, document and test it, then submit it to CrowdSec Hub.
Create a TypeScript or Go module that runs your tool web audits in CI and returns machine-readable JSON/SARIF with useful pass/fail thresholds, then publish it to Daggerverse.
Publish your reproducible privacy benchmark with code, synthetic data, model versions, and documentation.
Apply as a Datadog Technology Partner and build a production-grade integration that sends meaningful your tool telemetry, includes dashboards and documentation, and is useful to shared customers.
Create the real developer profile and add your tool as a genuine built project with problem, challenges, technologies, screenshots, demo, and accurate collaborator credits.
Submit your tool developer utilities; GitHub-auth community.
Build and verify your Discord app, then enable Discovery in the Developer Portal.
Publish your maintained CLI or server image with source, documentation, descriptions and canonical homepage links.
Publish your containerized research workflow or tool using CWL, WDL, Nextflow, Galaxy, or a supported notebook descriptor.
Create a functional Drupal integration or reusable module and publish a maintained project page with documentation and official links.
Build an Elastic package that ingests legitimate your tool logs, metrics, or traces and supplies mappings, pipelines, dashboards, documentation, sample data, and automated tests.
Submit your tool only with concrete evidence of privacy-first operation, local processing, transparent data practices, accessibility, and useful free resources.
Build a real Falco source or field-extraction plugin, publish a clear README and fields, add it to registry.yaml, sign commits, and submit the registry PR.
Build your useful privacy-preserving extension, submit a signed build, and provide honest homepage, permissions and privacy disclosures.
Create a public digital-privacy magazine, curate reputable third-party resources, and occasionally add strong your tool guides with commentary.
Submit a high-quality reusable template, page, component or permitted custom-code asset related to your workflow.
Open-source a meaningful component and prepare a community-focused talk, demo, or joint stand proposal for the next FOSDEM CFP rather than a company sales presentation.
Apply with a signed, downloadable open-source or qualifying freeware build that needs reliable binary hosting, malware scanning, and a public project page.
Create a comprehensive tutorial around a reusable privacy, file-processing, accessibility, or security technique, with your tool only as a natural example.
Create your company profile using your official email.
Build your real documentation/privacy integration, publish it as public, test it, then submit for GitBook review.
Tag and publish a public Go module with module docs and repository metadata so pkg.go.dev indexes it.
Publish your useful package to a supported registry with accurate source and homepage metadata so Open Source Insights can index it.
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.