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 filters3
Usefulimpact 68–58
- SubmitParticipedia (opens in a new tab)
Participedia
participedia.netDocument a real participatory public-decision deployment as a Case, Method or Organization entry with evaluations and project URL.
Estimated domain authority DA ~50FreeQuickVerified live - SubmitProcessWire Modules Directory (opens in a new tab)
ProcessWire Modules Directory
processwire.comBuild a ProcessWire admin module for external URL, metadata, accessibility or security audits, register as a module author and submit it to the official directory.
Estimated domain authority DA ~65FreeQuickVerified live - SubmitSciCrunch RRID Resource Portal (opens in a new tab)
SciCrunch RRID Resource Portal
scicrunch.orgRegister a stable, genuinely research-used your tool software, service, or database with accurate maintainer and version metadata.
Estimated domain authority DA ~60FreeQuickVerified live - SubmitArtStation (opens in a new tab)
ArtStation
artstation.comPublish an original UI/UX visual case study showing your tool interaction design, accessibility states, and design process, with a contextual project URL.
Estimated domain authority DA ~85NofollowFreeModerateVerified live - SubmitbalenaHub (opens in a new tab)
balenaHub
hub.balena.ioBuild a deployable edge privacy utility or reusable block, add balena.yml metadata, public source, configuration and multi-device tests, then publish it on balenaHub.
Estimated domain authority DA ~65FreeModerateVerified live - SubmitCharmhub (opens in a new tab)
Charmhub
charmhub.ioPackage your maintained self-hosted deployment as a Juju charm with canonical documentation, source, and support links.
Estimated domain authority DA ~60FreeModerateVerified live - SubmitCK-12 FlexBooks (opens in a new tab)
CK-12 FlexBooks
ck12.orgCreate an age-appropriate digital-citizenship or privacy FlexBook chapter with practical your tool exercises.
Estimated domain authority DA ~80FreeModerateVerified live - SubmitCoolify One-Click Services (opens in a new tab)
Coolify One-Click Services
coolify.ioCreate and fully test your Docker Compose service template, add metadata, logo, and documentation, then submit it to Coolify's next branch.
Estimated domain authority DA ~60FreeModerateVerified live - SubmitELIXIR TeSS (opens in a new tab)
ELIXIR TeSS
tess.elixir-europe.orgRegister a substantive life-science privacy, medical-data de-identification, or research-data training resource hosted by your tool.
Estimated domain authority DA ~45FreeModerateVerified live - SubmitFAIRsharing (opens in a new tab)
FAIRsharing
fairsharing.orgSubmit your genuine -maintained database, reusable reporting standard, or data policy with complete stewardship metadata.
Estimated domain authority DA ~60FreeModerateVerified live - SubmitGovStack (opens in a new tab)
GovStack
govstack.globalJoin a working group and contribute a substantive building-block specification, use case, reference implementation or new proposal.
Estimated domain authority DA ~45FreeModerateVerified live - SubmitHumanitarian Data Exchange (opens in a new tab)
Humanitarian Data Exchange
data.humdata.orgJoin an approved organization and publish a documented humanitarian privacy/safety dataset with licence and responsible-access settings.
Estimated domain authority DA ~80FreeModerateVerified live - SubmitOctopus (opens in a new tab)
Octopus
octopus.acUse ORCID to publish genuine research stages—problem, method, data or analysis—with contextual your tool code/data links.
Estimated domain authority DA ~40FreeModerateVerified live - SubmitOmeka S Modules (opens in a new tab)
Omeka S Modules
omeka.orgCreate a maintained Omeka S module for collection metadata privacy, accessibility or link auditing, package it correctly and register the add-on with project and author links.
Estimated domain authority DA ~65FreeModerateVerified live - SubmitOpen Research Knowledge Graph (opens in a new tab)
Open Research Knowledge Graph
orkg.orgCreate a rigorous structured comparison of published privacy, redaction, or accessibility studies and include your tool only when supported by research.
Estimated domain authority DA ~45FreeModerateVerified live - SubmitOSF (opens in a new tab)
OSF
osf.ioCreate a public reproducibility project for your tool research, datasets, test methods, or privacy benchmarks and link the genuine project/site.
Estimated domain authority DA ~85NofollowFreeModerateVerified live - Submitportfolio.dev (opens in a new tab)
portfolio.dev
portfolio.devCreate a public case-study portfolio and add your tool with screenshots, live demo and build rationale.
FreeModerateVerified live - SubmitReliefWeb (opens in a new tab)
ReliefWeb
reliefweb.intAfter your tool has eligible ReliefWeb content, request publishing access and submit humanitarian reports or training from verified owned URLs.
Estimated domain authority DA ~85FreeModerateVerified live - SubmitRenkuLab (opens in a new tab)
RenkuLab
renkulab.ioCreate your reproducible evaluation project with code, data connectors, environment, narrative, and a public session launcher.
Estimated domain authority DA ~40FreeModerateVerified live - SubmitWhole Tale (opens in a new tab)
Whole Tale
wholetale.orgCreate a reproducible Tale containing your evaluation's data, code, environment, outputs, and narrative, then publish through a supported repository.
Estimated domain authority DA ~40FreeModerateVerified live - SubmitBugcrowd Public Programs (opens in a new tab)
Bugcrowd Public Programs
bugcrowd.comLaunch your properly scoped vulnerability disclosure or public bug-bounty program.
Estimated domain authority DA ~80NofollowNot statedQuickVerified live - SubmitYesWeHack Public Programs (opens in a new tab)
YesWeHack Public Programs
yeswehack.comLaunch your defensive vulnerability disclosure or public bug-bounty program with managed researcher access.
Estimated domain authority DA ~60Not statedQuickVerified live - SubmitBCcampus Open Collection (opens in a new tab)
BCcampus Open Collection
bccampus.caPublish a Canadian-ready, openly licensed privacy or digital-citizenship textbook and use Contribute → Suggest a Textbook.
Estimated domain authority DA ~70Free + paid tierModerateVerified live - SubmitCalaméo (opens in a new tab)
Calaméo
calameo.comPublish a polished original guide, research brief, or accessibility zine as a public document, with useful references and your relevant link inside the editorial content.
Estimated domain authority DA ~85NofollowFree + paid tierModerateVerified live - SubmitDSCI Threat Intelligence & Research (opens in a new tab)
Pitch an original evidence-backed privacy, scam, or cyber advisory based on genuine your tool research.
Estimated domain authority DA ~50FreeInvolvedVerified live - SubmitInteroperable Europe / Joinup Solutions (opens in a new tab)
Interoperable Europe / Joinup Solutions
interoperable-europe.ec.europa.euPublish a mature open-source interoperability or public-administration solution with documentation, releases, licence, and owner metadata.
Estimated domain authority DA ~95FreeInvolvedVerified live - SubmitMilkshake (opens in a new tab)
Milkshake
milkshake.appBuild your free mobile mini-site with brand story, key collections, demos and contact links.
Estimated domain authority DA ~50Free + paid tierModerateVerified live - SubmitPodcast Movement (opens in a new tab)
Podcast Movement
podcastmovement.comSubmit an educational, non-sales session on privacy-safe tooling or accessible creator workflows when the next CFP opens.
Estimated domain authority DA ~60FreeInvolvedVerified live - SubmitPortship (opens in a new tab)
Portship
portship.appClaim a builder profile and add your tool as a shipped project using its live public URL.
Free + paid tierModerateVerified live - SubmitResearch Data Alliance Adoption Stories (opens in a new tab)
Research Data Alliance Adoption Stories
rd-alliance.orgDocument your real implementation of a named RDA recommendation with challenge, measurable outcome, lessons, and supporting resources.
Estimated domain authority DA ~65FreeInvolvedVerified live - SubmitThe Hacker News (opens in a new tab)
The Hacker News
thehackernews.comPitch original your tool security research, a defensible dataset or timely threat analysis.
Estimated domain authority DA ~85Sometimes dofollowFreeInvolvedVerified live - SubmitZotero Groups (opens in a new tab)
Zotero Groups
zotero.orgCreate a public privacy-tool research library with credible standards, papers, and references, including only genuinely relevant your tool documentation.
Estimated domain authority DA ~80NofollowFree + paid tierModerateVerified live - SubmitIBM Cloud Catalog (opens in a new tab)
IBM Cloud Catalog
ibm.comPackage your deployable self-hosted architecture for IBM Cloud, complete Partner Center onboarding, and request public catalog approval.
Estimated domain authority DA ~95NofollowNot statedModerateVerified live - SubmitRed Hat Ecosystem Catalog (opens in a new tab)
Red Hat Ecosystem Catalog
redhat.comPackage your supported self-hosted edition or integration for RHEL or OpenShift and complete Red Hat Partner Validation for a catalog page.
Estimated domain authority DA ~95Not statedModerateVerified live - SubmitIntigriti Public Programs (opens in a new tab)
Intigriti Public Programs
intigriti.comStart privately, mature the process, then publish your program indexed in Intigriti's public directory.
Estimated domain authority DA ~65NofollowPaidQuickVerified live
Long tailimpact 56
- SubmitDigital Public Goods Alliance (opens in a new tab)
Digital Public Goods Alliance
digitalpublicgoods.netAfter your tool has a genuinely open-source, well-documented public-interest component, complete the eligibility assessment and nominate that specific component.
Estimated domain authority DA ~55PaidModerateVerified live - SubmitPrinciples for Digital Development (opens in a new tab)
Principles for Digital Development
digitalprinciples.orgObtain senior approval, submit the signed endorsement materials, implement the Principles and share a real case study.
Estimated domain authority DA ~55PaidModerateVerified live
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.