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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.
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 | 98 | Postman Public API Network | 90 | Nofollow | postman.com | Design galleries | Free | Moderate | Do first | Verified live | Publish a well-documented public your tool API workspace with runnable collections, examples and the canonical API website. | Only suitable for a genuine public API; remove secrets and personal data and keep collections accurate. | Official Postman API Network docs checked 2026-07-30 | Open Postman Public API Network submit page (new tab)Postman Public API Network details |
| 2 | 84 | Coroflot | 70 | Nofollow | coroflot.com | Design galleries | Free | Moderate | High | Verified live | Create a real designer profile and publish an original your tool UX/accessibility case study with process artifacts, outcomes, and the official project link. | Coroflot is for genuine creative work; the official FAQ permits personal-website/social links. Use a real identity, rights-cleared visuals, and a substantive case study rather than a logo-plus-link page. Portfolio links are user-controlled UGC, can be moderated or made private, and have no indexing or followed-link guarantee. | 2026-08-03 | Open Coroflot submit page (new tab)Coroflot details |
| 3 | 84 | FOSDEM | 75 | Link type unknown | fosdem.org | Design galleries | Free | Moderate | High | Not submitted | 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. | All content must relate to Free and Open Source Software; selection is competitive, recordings/slides are published under CC BY, and the code of conduct applies. FOSDEM 2026 is over and the 2027 CFP is not yet posted. | 2026-08-03 | Open FOSDEM submit page (new tab)FOSDEM details |
| 4 | 84 | JSFiddle | 85 | Nofollow | jsfiddle.net | Design galleries | Free | Moderate | High | Verified live | Publish a small standalone your tool privacy or accessibility demo with explanatory comments and a stable share URL. | Use original client-side demo code and never include secrets, personal data, trackers, or a promotion-only empty fiddle. | Official JSFiddle getting-started documentation checked 2026-08-07 | Open JSFiddle submit page (new tab)JSFiddle details |
| 5 | 81 | Roboflow Universe | 70 | Link type unknown | roboflow.com | Design galleries | Free + paid tier | Moderate | High | Verified live | Publish a synthetic benchmark for screenshot redaction, document masking, or visual privacy detection. | Roboflow prohibits publishing PII, proprietary or copyrighted images, and unsafe content; select a valid licence. | Official Roboflow public project documentation checked 2026-08-07 | Open Roboflow Universe submit page (new tab)Roboflow Universe details |
| 6 | 74 | MetaFilter Projects | 85 | Nofollow | metafilter.com | Design galleries | Paid | Moderate | High | Verified live | After becoming a genuine member, submit your tool as a completed web project with a plain factual description in MetaFilter Projects only. | Self-links are prohibited elsewhere; use Projects only, respect posting cadence, and participate as a community member. | Official MetaFilter Projects, FAQ, and about pages checked 2026-08-07 | Open MetaFilter Projects submit page (new tab)MetaFilter Projects details |
| 7 | 71 | Codrops | 75 | Sometimes dofollow | tympanus.net | Design galleries | Paid | Involved | High | Verified live | Pitch a crafted, original interactive tutorial or demo about client-side privacy visualization, inclusive motion, or accessible creative tooling, with source and a working demo. | Codrops seeks fresh ideas and high-quality work for web professionals; the editorial and visual craft bar is high. Use a real author identity and pitch original teaching value, not a promotional guest post. | 2026-08-03 | Open Codrops submit page (new tab)Codrops details |
| 8 | 68 | Astro Showcase | 70 | Link type unknown | astro.build | Design galleries | Free | Quick | Medium | Live, conditional | If an your tool property genuinely uses Astro, use the Submit site action to propose it for the public showcase. | Only submit an actual Astro-built production site; acceptance is curated and not guaranteed. | 2026-08-05 | Open Astro Showcase submit page (new tab)Astro Showcase details |
| 9 | 68 | Devpost | 85 | Nofollow | devpost.com | Design galleries | Free | Quick | Medium | Verified live | Enter a relevant live hackathon with a working your tool project, complete its story and demo, and include the project website where allowed. | Only submit to genuinely relevant events, follow each hackathon's eligibility and judging rules, and do not recycle an unrelated promotion. | Official Devpost submission help checked 2026-07-30 | Open Devpost submit page (new tab)Devpost details |
| 10 | 68 | Upwork | 95 | Nofollow | upwork.com | Design galleries | Free | Quick | Medium | Live, conditional | If your tool maker genuinely offers related services, add the project as a detailed portfolio item with role, outcomes, visuals, and permitted project links. | Use only an authentic accepted freelancer profile; no contact details or brand-only backlink account, and follow portfolio link rules. | Official Upwork profile and portfolio guidance checked 2026-08-07 | Open Upwork submit page (new tab)Upwork details |
| 11 | 66 | Docusaurus Showcase | 75 | Link type unknown | docusaurus.io | Design galleries | Free | Moderate | Medium | Live, conditional | If your tool documentation genuinely runs on Docusaurus, add the polished docs site through the official showcase discussion. | Framework use is mandatory; maintain a polished live site and follow the current GitHub discussion template. | 2026-08-05 | Open Docusaurus Showcase submit page (new tab)Docusaurus Showcase details |
| 12 | 66 | JS Bin | 80 | Nofollow | jsbin.com | Design galleries | Free | Moderate | Medium | Verified live | Create a focused educational demo for one your tool technique and share the public bin from an authentic profile. | Public bins are MIT-licensed and bots are prohibited; publish only compatible original code and create it manually. | Official JS Bin getting-started and legal pages checked 2026-08-07 | Open JS Bin submit page (new tab)JS Bin details |
| 13 | 66 | Plunker | 70 | Nofollow | plnkr.co | Design galleries | Free | Moderate | Medium | Verified live | Build a working mini-project showing an your tool browser-side feature and publish its indexed share page with useful documentation. | Keep the project executable, original, educational, and free of credentials or user data. | Official Plunker feature documentation checked 2026-08-07 | Open Plunker submit page (new tab)Plunker details |
| 14 | 65 | Freelancer.com | 90 | Nofollow | freelancer.com | Design galleries | Free + paid tier | Quick | Medium | Live, conditional | Use an authentic maker profile to publish an your tool portfolio piece containing original images, article, code, video, or audio samples. | Use only when the person genuinely offers services; publish owned work and avoid profile keyword stuffing. | Official Freelancer.com portfolio and profile guidance checked 2026-08-07 | Open Freelancer.com submit page (new tab)Freelancer.com details |
| 15 | 63 | Carbonmade | 70 | Sometimes dofollow | carbonmade.com | Design galleries | Free + paid tier | Moderate | Medium | Not submitted | Build a substantive product-design case study covering your tool system, flows, and outcomes, then add the canonical site through supported navigation or project links. | Payment is required to go live; publish unique portfolio content rather than a duplicate or thin SEO page. | 2026-08-03 | Open Carbonmade submit page (new tab)Carbonmade details |
| 16 | 63 | Experiments with Google | 80 | Link type unknown | experiments.withgoogle.com | Design galleries | Free | Involved | Medium | Needs checking | Submit a finished, open web experiment that uses Google technologies (Chrome, WebGL, AI, AR) for their showcase; featured projects link to the live site and the creator. | Highly selective; projects normally need to be built on Google platforms or APIs and be publicly playable. | Added 2026-11-01 | Open Experiments with Google submit page (new tab)Experiments with Google details |
| 17 | 48 | DeviantArt | 95 | Nofollow | deviantart.com | Design galleries | Free | Quick | Later | Live, conditional | Publish original your tool UI/illustration work, then add the official website in the profile bio. | Only use for genuine visual work or design process content; generic product promotion is inappropriate. | 2026-08-03 | Open DeviantArt submit page (new tab)DeviantArt details |
| 18 | 46 | designboom | 85 | Sometimes dofollow | designboom.com | Design galleries | Free | Moderate | Later | Needs checking | Submit a design or architecture project through their DIY submission tool with images and text. | Editorial selection; product-design and tech projects need a strong design angle. | Added 2026-11-01 | Open designboom submit page (new tab)designboom details |
| 19 | 46 | It's Nice That | 75 | Sometimes dofollow | itsnicethat.com | Design galleries | Free | Moderate | Later | Needs checking | Send creative work for possible editorial coverage. | Highly selective; they cover creative work, not software marketing. | Added 2026-11-01 | Open It's Nice That submit page (new tab)It's Nice That details |
| 20 | 46 | Made in Webflow | 90 | Nofollow | webflow.com | Design galleries | Free | Moderate | Later | Needs checking | Submit only if your tool page/template is built in Webflow. | Not fit for current Next.js site unless Webflow asset. | 2026-07-30 | Open Made in Webflow submit page (new tab)Made in Webflow details |
| 21 | 45 | Dribbble | 90 | Nofollow | dribbble.com | Design galleries | Free + paid tier | Quick | Later | Not submitted | Share selected UI shots/tool pages with profile link. | Needs quality visuals; no spam shots. | 2026-07-30 | Open Dribbble submit page (new tab)Dribbble details |
| 22 | 43 | SiteInspire | 70 | Dofollow | siteinspire.com | Design galleries | Free + paid tier | Moderate | Later | Needs checking | Submit high-quality website design. | Selective design curation. | 2026-07-30 | Open SiteInspire submit page (new tab)SiteInspire details |
| 23 | 36 | Awwwards | 85 | Sometimes dofollow | awwwards.com | Design galleries | Paid | Moderate | Later | Needs checking | Submit your tool web design if premium/polished. | High authority; paid and design quality gate. | 2026-07-30 | Open Awwwards submit page (new tab)Awwwards details |
| 24 | 36 | CSS Design Awards | 70 | Sometimes dofollow | cssdesignawards.com | Design galleries | Paid | Moderate | Later | Needs checking | Submit site for CSS/design award. | Only after homepage/tool UX polished. | 2026-07-30 | Open CSS Design Awards submit page (new tab)CSS Design Awards details |
| 25 | 36 | The FWA | 70 | Link type unknown | thefwa.com | Design galleries | Paid | Moderate | Later | Needs checking | Submit an interactive site or WebGL experience for jury review; winners get a public award page linking to the work. | Submission fee per entry; judged on craft and innovation, most entries are not awarded. | Added 2026-11-01 | Open The FWA submit page (new tab)The FWA 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.