Free backlink sites list: 1,964 places to get a link
A maintained list of 1,964 legitimate backlink sites: directories, profile creation sites, guest posting sites, launch platforms, registries and marketplaces. 1,628 are free or have a free tier, 44 usually give a dofollow link, and 781 have an estimated DA of 70 or more. Every row shows authority, link type, cost and effort, and links straight to the submit page.
- 1,964
- Opportunities
- 1,628
- Free or freemium
- 781
- Est. DA 70+
- 208
- Quick wins
All filters2
Long tailimpact 48–46
- SubmitCampsite.bio (opens in a new tab)
Campsite.bio
campsite.bioCreate your profile and add genuinely useful homepage, privacy-tool and accessibility-tool links.
Estimated domain authority DA ~55NofollowFreeQuickVerified liveCreator Profile / Link Hub - SubmitDuckDB Community Extensions (opens in a new tab)
DuckDB Community Extensions
duckdb.orgBuild table functions that import, normalize and query your tool report JSON or NDJSON with typed findings, then submit the extension descriptor for central build and distribution.
Estimated domain authority DA ~70FreeQuickVerified liveEmbedded Analytics - SubmitFast Forward Tech Nonprofit Directory (opens in a new tab)
Apply only after your tool becomes a legally registered nonprofit with software central to scalable public impact.
Estimated domain authority DA ~50FreeQuickVerified liveTech Nonprofit - SubmitGentoo Packages (opens in a new tab)
Gentoo Packages
packages.gentoo.orgPrepare and test a policy-compliant ebuild for your stable CLI, including accurate HOMEPAGE and source metadata, then work with a Gentoo developer or proxy maintainer for repository inclusion.
Estimated domain authority DA ~75FreeQuickVerified liveOS Package Ecosystem - SubmitHaikuDepot (opens in a new tab)
HaikuDepot
depot.haiku-os.orgPort your functional desktop or CLI utility to Haiku, write and test a compliant recipe, then submit a feature-branch pull request to HaikuPorts.
Estimated domain authority DA ~55FreeQuickVerified liveOS Package Ecosystem - SubmitModelDB (opens in a new tab)
ModelDB
modeldb.scienceSubmit a licensed computational neuroscience model with code ZIP, publication citation, overview, contributors, and tags.
Estimated domain authority DA ~40FreeQuickVerified liveNeuroscience - SubmitOctoPrint Plugin Repository (opens in a new tab)
OctoPrint Plugin Repository
plugins.octoprint.orgBuild a maintained OctoPrint plugin for your credible -related workflow such as privacy-safe print logs or metadata checks, then register it through the official repository pull request.
Estimated domain authority DA ~50FreeQuickVerified live3D Printing Ecosystem - SubmitOpenDOAR (opens in a new tab)
OpenDOAR
opendoar.ac.ukRegister only after your tool launches a genuine open repository for reusable privacy/security research outputs.
Estimated domain authority DA ~65FreeQuickVerified liveResearch Infrastructure - SubmitOpenFeature Ecosystem (opens in a new tab)
OpenFeature Ecosystem
openfeature.devImplement a genuine OpenFeature provider, hook or integration around your configuration or audit-health use case, publish it and add it to the ecosystem documentation.
Estimated domain authority DA ~45FreeQuickVerified liveFeature Flag Ecosystem - SubmitStork.AI (opens in a new tab)
Stork.AI
stork.aiSubmit your tool with the verification badge or use the no-badge paid option.
FreeQuickVerified liveAI Tool Directory - SubmitApache Camel Components (opens in a new tab)
Apache Camel Components
camel.apache.orgBuild a production-grade Camel component for your tool APIs and propose it upstream with generated component docs and tests.
Estimated domain authority DA ~90NofollowFreeModerateVerified liveIntegration Framework - SubmitAstrophysics Source Code Library (opens in a new tab)
Astrophysics Source Code Library
ascl.netSubmit your -related astronomy utility only after it has been used in research submitted to or published by a refereed journal.
Estimated domain authority DA ~55FreeModerateVerified liveAstronomy Software - SubmitBioconda (opens in a new tab)
Bioconda
bioconda.github.ioCreate a tested Bioconda recipe for a genuinely biomedical or bioinformatics your tool utility, with accurate homepage/source metadata, and submit it through the official review workflow.
Estimated domain authority DA ~50FreeModerateVerified liveScientific Package Ecosystem - SubmitBioImage.IO (opens in a new tab)
BioImage.IO
bioimage.ioContribute a documented bioimaging privacy or de-identification model, application integration, or other qualifying resource linked to your tool.
Estimated domain authority DA ~40FreeModerateVerified liveBioimaging AI - SubmitCoMSES Computational Model Library (opens in a new tab)
CoMSES Computational Model Library
comses.netPublish a documented social, ecological, or computational model with source, narrative documentation, contributors, and reproducibility metadata.
Estimated domain authority DA ~50FreeModerateVerified liveComputational Research - SubmitCSDMS Model Repository (opens in a new tab)
CSDMS Model Repository
csdms.colorado.eduOpen-source a relevant geoscience model or component, complete the model questionnaire, and provide its code archive for CSDMS testing.
Estimated domain authority DA ~90FreeModerateVerified liveGeoscience Software - SubmitCytoscape App Store (opens in a new tab)
Cytoscape App Store
apps.cytoscape.orgBuild a Cytoscape 3 app for a genuine graph privacy, provenance or network-audit workflow, provide website/source metadata and submit its first release for administrator approval.
Estimated domain authority DA ~55FreeModerateVerified liveScientific Plugin Ecosystem - SubmitDebian Package Archive (opens in a new tab)
Debian Package Archive
packages.debian.orgCreate 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.
Estimated domain authority DA ~90FreeModerateVerified liveOS Package Ecosystem - SubmitFreeBSD Ports Collection (opens in a new tab)
FreeBSD Ports Collection
freebsd.orgCreate 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.
Estimated domain authority DA ~85FreeModerateVerified liveOS Package Ecosystem - SubmitGalaxy ToolShed (opens in a new tab)
Galaxy ToolShed
toolshed.g2.bx.psu.eduBuild a tested Galaxy wrapper for your medical-data privacy or de-identification workflow and publish it in the main ToolShed.
Estimated domain authority DA ~55FreeModerateVerified liveLife-Science Tools - SubmitioBroker Adapters (opens in a new tab)
ioBroker Adapters
iobroker.netDevelop 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.
Estimated domain authority DA ~50FreeModerateVerified liveHome Automation Ecosystem - SubmitLapce Volts Registry (opens in a new tab)
Lapce Volts Registry
lapce.devBuild a WASI/LSP Volt that surfaces useful your tool diagnostics for HTML or SEO configuration files, then publish it with the official Volts CLI.
Estimated domain authority DA ~45FreeModerateVerified liveCode Editor - SubmitLite XL Plugin Repository (opens in a new tab)
Lite XL Plugin Repository
lite-xl.comCreate a Lua plugin with real commands for your tool URL audits or JSON validation and add a conforming manifest entry to the official Lite XL plugin repository.
Estimated domain authority DA ~40FreeModerateVerified liveCode Editor - SubmitNetBSD pkgsrc (opens in a new tab)
NetBSD pkgsrc
netbsd.orgPackage your stable cross-platform CLI for pkgsrc, test it with pkglint and supported builds, include the canonical homepage, then submit via pkgsrc-wip or NetBSD's package bug tracker.
Estimated domain authority DA ~75FreeModerateVerified liveOS Package Ecosystem - Submitnf-core (opens in a new tab)
nf-core
nf-co.rePropose and contribute your standards-compliant -related bioinformatics privacy module, subworkflow, or full Nextflow pipeline.
Estimated domain authority DA ~50FreeModerateVerified liveBioinformatics Workflows - SubmitNWB NDX Catalog (opens in a new tab)
NWB NDX Catalog
nwb-extensions.github.ioCreate a meaningful NWB extension for privacy, provenance, or consent metadata and submit its staged-extension YAML through an official pull request.
Estimated domain authority DA ~25FreeModerateVerified liveNeurodata Standards - SubmitOpenEBench (opens in a new tab)
OpenEBench
openebench.bsc.esOrganize a rigorous life-science privacy-tool benchmark or participate with your eligible method and publish validated results.
Estimated domain authority DA ~40FreeModerateVerified liveScientific Benchmarking - SubmitopenHAB Add-on Store (opens in a new tab)
openHAB Add-on Store
openhab.orgBuild a real openHAB add-on that integrates your home-network privacy or safety service, provide addon.xml, tests and documentation, then submit it upstream.
Estimated domain authority DA ~65FreeModerateVerified liveHome Automation Ecosystem - SubmitOpenWrt Packages (opens in a new tab)
OpenWrt Packages
openwrt.orgBuild your OpenWrt-compatible service or utility for a real router/privacy/security workflow, add correct package metadata and tests, then submit it to the official feed.
Estimated domain authority DA ~75FreeModerateVerified liveOS Package Ecosystem - SubmitPreprints.org (opens in a new tab)
Preprints.org
preprints.orgPublish an original benchmark or evaluation study of local-first privacy or security tooling with open code, data, and your tool implementation.
Estimated domain authority DA ~75FreeModerateVerified livePreprints - SubmitPromote Project (opens in a new tab)
Promote Project
promoteproject.comCreate your truthful /founder profile or content page and add the website link where allowed.
Estimated domain authority DA ~35FreeModerateVerified liveProfile / entity - SubmitpyOpenSci (opens in a new tab)
pyOpenSci
pyopensci.orgSubmit a mature scientific Python package related to your privacy or accessibility workflow for public review and listing.
Estimated domain authority DA ~45FreeModerateVerified liveResearch Software Review - SubmitQIIME 2 Library (opens in a new tab)
QIIME 2 Library
library.qiime2.orgBuild and test a legitimate QIIME 2 plugin for a microbiome-data privacy, validation or provenance use case, then distribute it through the QIIME 2 Library.
Estimated domain authority DA ~50FreeModerateVerified liveScientific Plugin Ecosystem - SubmitReScience C (opens in a new tab)
ReScience C
rescience.github.ioIndependently reproduce a published computational privacy or security result with open code and data, using your tool only where scientifically justified.
Estimated domain authority DA ~35FreeModerateVerified liveReproducibility Journal - SubmitResearchBox (opens in a new tab)
ResearchBox
researchbox.orgOrganize the complete code, data, materials, and outputs behind your real evaluation study into a public citable box.
Estimated domain authority DA ~30FreeModerateVerified liveResearch Artifacts - SubmitrOpenSci (opens in a new tab)
rOpenSci
ropensci.orgIf your tool produces a research-grade R package, submit a presubmission inquiry and the package for open review.
Estimated domain authority DA ~70FreeModerateVerified liveResearch Software Review - SubmitROS Index (opens in a new tab)
ROS Index
index.ros.orgBuild a real ROS package for your robotics/privacy/safety workflow, release it through rosdistro and expose maintained README, documentation and source links in ROS Index.
Estimated domain authority DA ~70FreeModerateVerified liveRobotics Software Ecosystem - SubmitSecretSearchEngineLabs (opens in a new tab)
SecretSearchEngineLabs
secretsearchenginelabs.comSubmit your tool (or its blog/feed where required) under productivity, privacy or developer tools.
Estimated domain authority DA ~50FreeModerateVerified liveWeb / business directory - SubmitSellfy (opens in a new tab)
Sellfy
sellfy.comPublish your substantive privacy template, workbook, or creator resource with a complete description, original previews, and accurate licensing.
Estimated domain authority DA ~75FreeModerateVerified liveCreator Storefront - SubmitSites Plus (opens in a new tab)
Sites Plus
sites-plus.comSubmit your tool (or its blog/feed where required) under productivity, privacy or developer tools.
FreeModerateVerified liveWeb / business directory
How to build backlinks with this list
Four steps that work for a new site, a SaaS or a side project. No paid link packages, nothing that risks a penalty.
Get the basics right first
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.
Claim profiles and free listings
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.
Go after a few strong links
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.
Track and keep it clean
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
A link opportunity is not a link.
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.
Backlink sites by category
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.