Listed alphabetically. A tool is ranked by its reviews once it has 3.
| Tool | Reviews | Lowest paid plan | Free plan | Free trial | Public API | Runs on | Main features |
|---|---|---|---|---|---|---|---|
 BookStackA simple, self-hosted, easy-to-use platform for organising and storing information | ReviewsNone yetWrite one for BookStack | Lowest paid planSee plans | Free planYes | Free trialNot confirmed | Public APIYes | Runs onNot confirmed | Main features
|
 ConfluenceConfluence is your team workspace for creating and sharing knowledge. | ReviewsNone yetWrite one for Confluence | Lowest paid plan$5.78per user per month, as listed for 300 usersStandard, as of October 20, 2026 | Free planYes | Free trialYes | Public APIYes | ||
 GitBookThe docs platform that flags outdated content and keeps docs accurate for people and AI | ReviewsNone yetWrite one for GitBook | Lowest paid plan$65per site per month, billed annually, plus $12 per userEssential, as of October 19, 2026 | Free planYes | Free trial14 days | Public APIYes | ||
 GuruStructures, governs, and continuously improves your company's knowledge | ReviewsNone yetWrite one for Guru | Lowest paid planNot confirmed | Free planNot confirmed | Free trialNot confirmed | Public APIYes | Runs onChrome extension, Slack, Microsoft Teams | Main features |
| MintlifySelf-updating documentation for startups, enterprises, and agents. | ReviewsNone yetWrite one for Mintlify | Lowest paid plan$450per month billed annuallyPro, as of October 28, 2026 | Free planYes | Free trialNot confirmed | Public APIYes | Runs on | |
 NotionThe AI workspace to build custom agents, search across your apps, and automate busywork | ReviewsNone yetWrite one for Notion | Lowest paid plan$10per member per monthPlus, as of October 19, 2026 | Free planYes | Free trialYes | Public APIYes | ||
 NuclinoA simple, fast way to collaborate - bring knowledge, docs, and projects together in one place | ReviewsNone yetWrite one for Nuclino | Lowest paid planSee plans | Free planYes | Free trial14 days | Public APIYes | ||
 OutlineYour team's knowledge base | ReviewsNone yetWrite one for Outline | Lowest paid planSee plans | Free planYes | Free trial30 days | Public APIYes | ||
| ReadMeHelping you create docs that make your APIs easy to use and maintain. | ReviewsNone yetWrite one for ReadMe | Lowest paid plan$250per month, billed annuallyPro, as of October 28, 2026 | Free planYes | Free trialYes | Public APIYes | ||
 SlabEasily create, organize, and discover knowledge for your entire organization | ReviewsNone yetWrite one for Slab | Lowest paid plan$6.67per user per month, billed annuallyStartup, as of October 20, 2026 | Free planYes | Free trialNot confirmed | Public APIYes | ||
 SliteThe self-maintaining AI knowledge base that stays accurate | ReviewsNone yetWrite one for Slite | Lowest paid plan$10per user per month, billed annuallyBasic, as of October 19, 2026 | Free planNot confirmed | Free trial14 days | Public APIYes | ||
 TettraStop answering repetitive questions in Slack with an AI-powered knowledge base | ReviewsNone yetWrite one for Tettra | Lowest paid plan$8per user per month, billed yearlyScaling, as of October 23, 2026 | Free planNot confirmed | Free trialNot confirmed | Public APIYes | Runs onSlack |
From each tool's own website. “Not confirmed” means we couldn't confirm it there, not that the tool doesn't have it. Each tool's page says when its facts were checked.
How this list is made
A tool is listed here only when we've confirmed on its own website that it has a public API. Tools we couldn't confirm it for are left out, even if they may have it. Vendors can't pay for a place on this list. Add a tool we missed