AltF Backlinks

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
Filtered byQuick to submit— remove this filterLater— remove this filterVerified live— remove this filterClear all

1–18 of 18 opportunities

Long tailimpact 48–38

  • Campsite.bio

    campsite.bio

    Create your profile and add genuinely useful homepage, privacy-tool and accessibility-tool links.

    Estimated domain authority DA ~55NofollowFreeQuickVerified liveCreator Profile / Link Hub
    SubmitCampsite.bio (opens in a new tab)

  • DuckDB Community Extensions

    duckdb.org

    Build 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
    SubmitDuckDB Community Extensions (opens in a new tab)

  • Fast Forward Tech Nonprofit Directory

    ffwd.org

    Apply only after your tool becomes a legally registered nonprofit with software central to scalable public impact.

    Estimated domain authority DA ~50FreeQuickVerified liveTech Nonprofit
    SubmitFast Forward Tech Nonprofit Directory (opens in a new tab)

  • Gentoo Packages

    packages.gentoo.org

    Prepare 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
    SubmitGentoo Packages (opens in a new tab)

  • HaikuDepot

    depot.haiku-os.org

    Port 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
    SubmitHaikuDepot (opens in a new tab)

  • ModelDB

    modeldb.science

    Submit a licensed computational neuroscience model with code ZIP, publication citation, overview, contributors, and tags.

    Estimated domain authority DA ~40FreeQuickVerified liveNeuroscience
    SubmitModelDB (opens in a new tab)

  • OctoPrint Plugin Repository

    plugins.octoprint.org

    Build 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
    SubmitOctoPrint Plugin Repository (opens in a new tab)

  • OpenDOAR

    opendoar.ac.uk

    Register only after your tool launches a genuine open repository for reusable privacy/security research outputs.

    Estimated domain authority DA ~65FreeQuickVerified liveResearch Infrastructure
    SubmitOpenDOAR (opens in a new tab)

  • OpenFeature Ecosystem

    openfeature.dev

    Implement 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
    SubmitOpenFeature Ecosystem (opens in a new tab)

  • Stork.AI

    stork.ai

    Submit your tool with the verification badge or use the no-badge paid option.

    FreeQuickVerified liveAI Tool Directory
    SubmitStork.AI (opens in a new tab)

  • Alignable

    alignable.com

    Create your business profile only if it genuinely operates in the United States or Canada and can be verified there.

    Estimated domain authority DA ~75NofollowFree + paid tierQuickVerified liveLocal / Business Listing
    SubmitAlignable (opens in a new tab)

  • Lnk.Bio

    lnk.bio

    Build one your tool profile with a short description and curated links to the most useful tool pages.

    Estimated domain authority DA ~70NofollowFree + paid tierQuickVerified liveCreator Profile / Link Hub
    SubmitLnk.Bio (opens in a new tab)

  • Solo.to

    solo.to

    Create your business page with concise brand details and links to the homepage, popular tools and socials.

    Estimated domain authority DA ~60NofollowFree + paid tierQuickVerified liveCreator Profile / Link Hub
    SubmitSolo.to (opens in a new tab)

  • UK Startup Hub

    ukstartuphub.com

    Submit a concise company profile only if your tool is a genuine UK startup or has a verifiable UK operating entity.

    Free + paid tierQuickVerified liveRegional startup directory
    SubmitUK Startup Hub (opens in a new tab)

  • Yelp for Business

    yelp.com

    Claim your tool’s genuine operating location only if the business is eligible, then add accurate website and contact information.

    Estimated domain authority DA ~95NofollowFree + paid tierQuickVerified liveLocal / Business Listing
    SubmitYelp for Business (opens in a new tab)

  • AIapps

    aiapps.com

    Consider only after your tool has a substantial AI feature and the directory offers business value beyond a link.

    Estimated domain authority DA ~35PaidQuickVerified liveAI Tool Directory
    SubmitAIapps (opens in a new tab)

  • EOSC Federation

    eosc.eu

    Onboard your operational research-facing service through an eligible EOSC Node using the Federation Handbook process.

    Estimated domain authority DA ~55PaidQuickVerified liveEuropean Research Infrastructure
    SubmitEOSC Federation (opens in a new tab)

  • FIRST

    first.org

    Apply as Associate or full Member only after operating a credible incident-response team/program and completing sponsorship/review.

    Estimated domain authority DA ~75PaidQuickVerified liveDigital Safety
    SubmitFIRST (opens in a new tab)

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.

  1. 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.

  2. 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.

  3. 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.

  4. 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 view

An 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

Product launch sites87

One-shot launches where timing and preparation decide the outcome.

Guest posting sites55

Publications that accept contributed articles. Slow and editorial, but the links are earned.

AI tool directories200

Fast-growing listings specifically for AI-powered tools.

App stores and marketplaces273

Extension, plugin and integration stores. Real review processes, real distribution.

Startup directory submission sites120

Startup listings, beta lists and founder media.

Software directory submission sites215

General tool and software catalogues with real search traffic.

Software review sites29

B2B review sites. Slow to approve, strong once live.

Developer platforms for backlinks139

Package, image and docs hosting that carries real authority.

Web design galleries for backlinks87

Showcases judged on craft. A good screenshot matters more than copy.

Web 2.0 and publishing sites214

Write once, link back. Editorial standards vary widely.

PR and press release sites41

Get quoted or distribute a release. Slower, higher ceiling.

Business directory submission sites109

Company and local listings. Unglamorous, consistently indexed.

Profile creation sites163

Owned pages you control: company, founder, knowledge-panel entities.

Forum and community backlink sites61

Answer real questions. Never drop a bare link.

Social bookmarking sites18

Brand surface and referral traffic more than link equity.

More backlink opportunities153

Everything that does not fit the buckets above.

Common questions

Do backlinks still matter for ranking in 2026?
Links remain one signal among many, and low-quality bulk links do more harm than good. What still works is being listed where your buyers actually look — directories with real traffic, registries your peers use, and launch platforms with engaged audiences. Every entry in this list is a place a human might plausibly find you, which is why they are worth submitting to regardless of link equity.
Which submissions should I do first?
Start with the quick wins filter: free, low effort, and not in the lowest priority band. 208 of the 1,964 entries qualify, and those are the ones where a single form submission gets you a live listing the same week. Launch platforms are worth saving until your product is genuinely ready, because you only get one good attempt at each.
How is the impact score calculated?
It starts from a hand-assigned priority band (do first, high, medium, later), then adjusts for cost and effort. A free, quick opportunity scores above a paid, involved one in the same band, because it is the one you can realistically finish today. The score is a queueing aid, not a measure of domain authority.
Are these links free?
1,628 of the 1,964 entries are free to submit to or offer a free tier that includes a listing. Cost is shown on every row, and the "nothing to pay" filter narrows the list to exactly those.
Which backlink sites are dofollow?
44 entries are known to give a followed link on a normal listing, and more give one only in some placements. The link type is shown on every row and can be filtered. Sites change their link policy without notice, so treat the label as a starting point and check the live page after you are listed. A nofollow link from a busy site still sends visitors and helps search engines discover you.
What does the DA number mean?
It is our estimate of the site's domain authority, a third-party style 0-100 score of how strong a domain's link profile is, rounded to the nearest 5. 1,580 of the 1,964 sites have one. It is useful for comparing sites, not a Google metric, so relevance to your niche still matters more.
How do I get backlinks for a new website?
1. 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. 2. 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. 3. 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. 4. 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.
Will submitting everywhere hurt my site?
Submitting to spam directories can. That is why this list is curated rather than scraped, and why entries carry a status showing whether they have been verified as live. Skip anything that promises hundreds of links for a fee, and prefer places where a real person reviews submissions.