Loading page
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.
The table is wider than the screen — swipe it sideways for cost, effort and the preparation notes.
| # | Impact (sorted) | Site — sort by this | Est. DA — sort by this | Link | Domain | Type | Cost | Effort — sort by this | Priority | Status | What to prepare | Rules / caveat | Checked | Actions |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 100 | CSA STAR Registry | 80 | Sometimes dofollow | cloudsecurityalliance.org | Developer registries | Free | Quick | Do first | Live, conditional | Complete the current CAIQ or AI-CAIQ truthfully and submit your tool real cloud service to the STAR Registry. | Cloud/SaaS fit only; disclose actual controls and update annually. Never overstate security practices. | 2026-08-04 | Open CSA STAR Registry submit page (new tab)CSA STAR Registry details |
| 2 | 100 | OpenSSF Best Practices Badge | 60 | Link type unknown | bestpractices.dev | Profiles and entities | Free | Quick | Do first | Live, conditional | Open-source a well-scoped your tool component, document its governance, tests, security process, and complete the passing-badge self-assessment. | Only genuine FLOSS projects qualify; claims are checked and must be backed by public evidence, including a public repository, license, contribution path, HTTPS, tests, and vulnerability-reporting process. | 2026-08-03 | Open OpenSSF Best Practices Badge submit page (new tab)OpenSSF Best Practices Badge details |
| 3 | 100 | Postman | 90 | Nofollow | postman.com | Profiles and entities | Free | Quick | Do first | Live, conditional | Create an your tool public workspace with sanitized API collections, examples, documentation, and a canonical homepage link on the publisher profile. | Never publish tokens, cookies, secrets, private endpoints, or user data; run the secret scan before making a workspace public. | https://learning.postman.com/v11/docs/collaborating-in-postman/using-workspaces/public-workspaces | Open Postman submit page (new tab)Postman details |
| 4 | 100 | StartupTN | 35 | Link type unknown | startuptn.in | Startup directories | Free | Quick | Do first | Live, conditional | Use the official Register flow and build a verified your tool company profile if Tamil Nadu startup rules are met. | Use the homepage registration flow because deep URLs change; public visibility and acceptance remain conditional. | 2026-08-04 | Open StartupTN submit page (new tab)StartupTN details |
| 5 | 98 | crates.io | 80 | Nofollow | crates.io | Developer registries | Free | Moderate | Do first | Live, conditional | Publish a genuine your tool Rust client, CLI, parser, or privacy library and set homepage, repository, README, license, and documentation metadata. | Conditional on useful compiling code. Published versions are permanent; GitHub login, verified email, and API token are required. | https://doc.rust-lang.org/cargo/reference/publishing.html | Open crates.io submit page (new tab)crates.io details |
| 6 | 98 | Google Workspace Marketplace | 95 | Nofollow | workspace.google.com | Marketplaces and app stores | Free | Moderate | Do first | Live, conditional | Build an your tool add-on for Drive, Docs, Sheets, Gmail, or another Workspace product and publish it. | Must genuinely integrate with Google Workspace and pass OAuth, configuration, and app review. | https://developers.google.com/workspace/marketplace/how-to-publish | Open Google Workspace Marketplace submit page (new tab)Google Workspace Marketplace details |
| 7 | 98 | Kerala Startup Mission | 55 | Link type unknown | startupmission.kerala.gov.in | Startup directories | Free | Moderate | Do first | Live, conditional | Apply using valid Startup India/DPIIT credentials and complete your tool startup profile for ecosystem visibility. | Kerala registration, age, turnover and innovation criteria apply; verification and public visibility are conditional. | 2026-08-04 | Open Kerala Startup Mission submit page (new tab)Kerala Startup Mission details |
| 8 | 98 | Maharashtra State Innovation Society | 30 | Link type unknown | msins.in | Startup directories | Free | Moderate | Do first | Live, conditional | Choose Startup Register and complete your tool verified entity, DPIIT, contact, product and website profile. | Requires entity PAN, DPIIT number and truthful registered-company data; Maharashtra eligibility and verification apply. | 2026-08-04 | Open Maharashtra State Innovation Society submit page (new tab)Maharashtra State Innovation Society details |
| 9 | 98 | MCP Registry | 70 | Link type unknown | modelcontextprotocol.io | Developer registries | Free | Moderate | Do first | Live, conditional | Package a real your tool MCP server, verify its namespace, create server.json and publish it with mcp-publisher. | Registry is in preview; package or remote server must be public and namespace ownership is validated. | 2026-08-04 | Open MCP Registry submit page (new tab)MCP Registry details |
| 10 | 98 | Microsoft Marketplace | 100 | Nofollow | microsoft.com | Marketplaces and app stores | Free | Moderate | Do first | Live, conditional | Register in Partner Center and publish an your tool SaaS or Microsoft-integrated offer. | Requires an eligible Partner Center account, offer configuration, testing, and certification. | https://learn.microsoft.com/en-us/partner-center/marketplace-offers/create-new-saas-offer | Open Microsoft Marketplace submit page (new tab)Microsoft Marketplace details |
| 11 | 98 | Open Source Technology Improvement Fund | 45 | Link type unknown | ostif.org | Other opportunities | Free | Moderate | Do first | Live, conditional | Request an audit for a mature open-source your tool security component, providing maintainer contacts, architecture, threat model, scope, tests, and a remediation commitment. | Intended for real open-source projects able to collaborate throughout scoping, audit, fixes, disclosure, and publication of the final report; selection and funding are not guaranteed. | 2026-08-03 | Open Open Source Technology Improvement Fund submit page (new tab)Open Source Technology Improvement Fund details |
| 12 | 98 | Packagist | 75 | Nofollow | packagist.org | Developer registries | Free | Moderate | Do first | Live, conditional | Publish a real your tool PHP SDK or integration from a public repository and set the canonical homepage in composer.json. | Conditional on a functional Composer package with a unique vendor/name, public repository, valid metadata, and maintained releases. | https://packagist.org/about | Open Packagist submit page (new tab)Packagist details |
| 13 | 98 | PyPI | 90 | Nofollow | pypi.org | Developer registries | Free | Moderate | Do first | Live, conditional | Publish a real your tool Python SDK, CLI, or integration package and set Homepage, Documentation, Source, and Issues URLs in package metadata. | Conditional on maintaining a functional Python package; no placeholder packages, name squatting, or keyword stuffing. | https://packaging.python.org/en/latest/specifications/well-known-project-urls/ | Open PyPI submit page (new tab)PyPI details |
| 14 | 98 | RubyGems.org | 80 | Nofollow | rubygems.org | Developer registries | Free | Moderate | Do first | Live, conditional | Publish and maintain a genuine your tool Ruby client, CLI, or integration gem with accurate homepage, source, documentation, and changelog metadata. | Conditional on a working Ruby gem; package names are unique and public releases should be treated as permanent. | https://guides.rubygems.org/publishing/ | Open RubyGems.org submit page (new tab)RubyGems.org details |
| 15 | 98 | Slack Marketplace | 95 | Link type unknown | slack.com | Marketplaces and app stores | Free | Moderate | Do first | Live, conditional | Build a production-ready your tool Slack app for safe file/text utilities, then submit it from the app configuration page for Marketplace review. | Must be fully functional, installable, tested outside the development workspace, secure, and useful inside Slack; review is strict. | https://api.slack.com/directory/app-review-guide | Open Slack Marketplace submit page (new tab)Slack Marketplace details |
| 16 | 98 | Spreaker | 85 | Nofollow | spreaker.com | Other opportunities | Free | Moderate | Do first | Live, conditional | Create or import a genuine your tool show, keep it public, set its official Website field and publish useful episodes. | Correct ownership and original/licensed audio are required; no promotional shell podcast. | 2026-08-04 | Open Spreaker submit page (new tab)Spreaker details |
| 17 | 98 | Startup Odisha | 40 | Link type unknown | startupodisha.gov.in | Startup directories | Free | Moderate | Do first | Live, conditional | Register and apply with accurate your tool entity, innovation, workforce and website details if Odisha criteria are met. | Odisha registration/workforce, age, turnover and innovation tests plus nodal review apply; profile is conditional. | 2026-08-04 | Open Startup Odisha submit page (new tab)Startup Odisha details |
| 18 | 97 | Atlassian Marketplace | 90 | Nofollow | atlassian.com | Marketplaces and app stores | Free + paid tier | Quick | Do first | Live, conditional | Build a Forge-based your tool integration for Jira or Confluence, create a Marketplace Partner profile, and submit a compliant public listing. | New submissions must use supported cloud/Forge paths and meet security, privacy, legal, support, and active-maintenance requirements. | https://developer.atlassian.com/platform/marketplace/introduction-to-marketplace/ | Open Atlassian Marketplace submit page (new tab)Atlassian Marketplace details |
| 19 | 97 | RapidAPI | 80 | Link type unknown | rapidapi.com | Marketplaces and app stores | Free + paid tier | Quick | Do first | Live, conditional | Publish a real, documented your tool API, complete its Hub listing with accurate website and terms URLs, and optionally offer a free usage tier. | Conditional on a stable production API with correct auth, documentation, monitoring, support, privacy, and functional endpoint tests. | https://docs.rapidapi.com/docs/what-is-rapidapi | Open RapidAPI submit page (new tab)RapidAPI details |
| 20 | 95 | FeaturedCustomers | 60 | Sometimes dofollow | featuredcustomers.com | Profiles and entities | Free + paid tier | Moderate | Do first | Live, conditional | Add the company, verify ownership, and supply genuine customer references, case studies, and brand assets. | Designed for B2B software and services; customer references must be genuine and the vendor must pass verification. | 2026-08-03 | Open FeaturedCustomers submit page (new tab)FeaturedCustomers details |
| 21 | 95 | Podbean | 85 | Nofollow | podbean.com | Other opportunities | Free + paid tier | Moderate | Do first | Live, conditional | Publish a real your tool episode and add contextual links to resources actually discussed in its show notes. | No keyword stuffing or shell podcast; some custom show and episode website fields require Unlimited Audio or higher. | 2026-08-04 | Open Podbean submit page (new tab)Podbean details |
| 22 | 95 | Shopify App Store | 95 | Link type unknown | shopify.com | Marketplaces and app stores | Free + paid tier | Moderate | Do first | Live, conditional | Build a real Shopify-facing your tool utility, complete its public listing, test it on a development store, and submit it for App Store review. | Must integrate with Shopify, have a functional merchant UI, comply with data/privacy rules, and pass technical and listing review. | https://shopify.dev/docs/apps/launch/app-store-review | Open Shopify App Store submit page (new tab)Shopify App Store details |
| 23 | 88 | FOSS United Grants | 45 | Link type unknown | fossunited.org | Other opportunities | Paid | Moderate | Do first | Live, conditional | Propose a genuinely open-source, privacy-preserving your tool component with a public roadmap, Indian community benefit, budget, milestones, and maintenance plan. | Funding is for FOSS creators, maintainers, projects, and communities in India; a closed-source commercial site or a marketing-only proposal is not eligible. | 2026-08-03 | Open FOSS United Grants submit page (new tab)FOSS United Grants details |
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.