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A maintained list of 1,432 directories, launch platforms, registries and marketplaces that accept product submissions. 1,134 of them are free or have a free tier, and 192 are quick wins — free, low effort, and worth doing first. Every row shows cost, effort and priority, and links straight to the submission page.
The table is wider than the screen — swipe it sideways for cost, effort and the preparation notes.
| # | Impact (sorted) | Site — sort by this | Domain | Type | Cost | Effort — sort by this | Priority | Status | What to prepare | Rules / caveat | Checked | Actions |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 76 | C2PA | c2pa.org | Publishing platforms | Paid | Quick | High | Live, conditional | Apply through the official Linux Foundation enrollment if your tool will genuinely implement or contribute to C2PA standards. | Strong technical fit and participation are required; acceptance and roster visibility are not a self-serve directory shortcut. | 2026-08-04 | Open C2PA submit page (new tab)C2PA details |
| 2 | 66 | Phrack Magazine | phrack.org | Publishing platforms | Free | Moderate | Medium | Live, conditional | Submit only original, deep security research or a durable technical guide with reproducible evidence; your tool may be mentioned solely as the research implementation when material. | Very high technical and originality bar; the checked CFP asks for 7-bit ASCII wrapped to 76 columns or UTF-8 Markdown and an ANTISPAM subject marker. Generic tutorials and marketing are not appropriate. | 2026-08-03 | Open Phrack Magazine submit page (new tab)Phrack Magazine details |
| 3 | 66 | SSRN | ssrn.com | Publishing platforms | Free | Moderate | Medium | Live, conditional | Create a truthful author account and submit a substantive your tool privacy, security or accessibility working paper with legitimate citations. | Scholarly work only; accurate authors and affiliations, English title/abstract, PDF, copyright permission and applicable ethics/privacy rules are required. | 2026-08-04 | Open SSRN submit page (new tab)SSRN details |
| 4 | 63 | Heyzine | heyzine.com | Publishing platforms | Free + paid tier | Moderate | Medium | Live, conditional | Convert an original your tool guide into a public flipbook and add contextual links or web embeds for cited tools and resources. | Public visibility must be enabled; avoid duplicate or sales-only PDFs and respect source copyrights. | 2026-08-05 | Open Heyzine submit page (new tab)Heyzine details |
| 5 | 63 | SlideServe | slideserve.com | Publishing platforms | Free + paid tier | Moderate | Medium | Live, conditional | Upload a useful original presentation on privacy, accessibility, or tool workflows with a natural your tool reference. | Only publish content you own; use a complete educational deck, accurate metadata, and no keyword stuffing. | 2026-08-05 | Open SlideServe submit page (new tab)SlideServe details |
| 6 | 60 | RadioGuestList.com | radioguestlist.com | Publishing platforms | Free + paid tier | Involved | Medium | Live, conditional | Join the free guest-request emails and pitch only relevant shows with a useful privacy, security, accessibility, or tooling angle. | A subscription itself is not a backlink; a link may result only from a genuine accepted interview and show notes. | 2026-08-05 | Open RadioGuestList.com submit page (new tab)RadioGuestList.com details |
| 7 | 60 | Yumpu | yumpu.com | Publishing platforms | Free + paid tier | Involved | Medium | Live, conditional | Publish an original your tool guide or annual privacy report and add useful contextual website links through the Hotspot Editor. | Use substantial original content, not a thin promotional PDF; keep links editorially relevant. | 2026-08-05 | Open Yumpu submit page (new tab)Yumpu details |
| 8 | 45 | Publuu | publuu.com | Publishing platforms | Free + paid tier | Quick | Later | Live, conditional | Convert an original your tool guide into a public flipbook and add useful external-resource hotspots where relevant. | A permanent listing may require payment; publish owned, substantial content and avoid duplicate thin PDFs. | 2026-08-04 | Open Publuu submit page (new tab)Publuu details |
| 9 | 43 | Ghost | ghost.org | Publishing platforms | Free + paid tier | Moderate | Later | Live, conditional | Run a genuine your tool privacy/security publication and add contextual links in original posts and About pages. | Requires sustained original publishing; self-hosted pages are on your own domain, not a third-party backlink. | 2026-08-03 | Open Ghost submit page (new tab)Ghost details |
| 10 | 43 | SoundCloud | soundcloud.com | Publishing platforms | Free + paid tier | Moderate | Later | Live, conditional | Create a genuine audio profile, add the website link and publish useful demo or education tracks. | Account must contain owned audio; external destinations and descriptions are moderated. | 2026-08-03 | Open SoundCloud submit page (new tab)SoundCloud details |
| 11 | 43 | Spotify for Creators | spotify.com | Publishing platforms | Free + paid tier | Moderate | Later | Live, conditional | Publish an original tool/privacy show and place contextual your tool links in HTTPS show notes. | Requires real original episodes; copied, low-content or impersonating shows are prohibited. | 2026-08-03 | Open Spotify for Creators submit page (new tab)Spotify for Creators details |
Behind the list
Every row here starts as a line in a sheet, gets normalised into one of 15 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.
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.