Publishing API documentation usually means either hand-writing docs that go stale the moment the API changes, or wrestling with a generic Swagger UI that developers tolerate rather than enjoy. Theneo's pitch is to generate documentation that looks hand-crafted, keeps itself current, and can answer questions on its own. Theneo is an AI-native platform for API documentation and developer portals supporting REST, GraphQL, gRPC, SOAP and Async APIs, with automatic breaking-change detection in changelogs, an "Ask AI" bot for developer queries, private authenticated customer portals with role-based access, multi-stage review workflows, and both WYSIWYG and Markdown editing. It's Y Combinator-backed with funding from Mercury Bank and Atlassian, has been building AI documentation generation since 2022 (predating ChatGPT's public launch), holds SOC 2 Type II / ISO 27001 / GDPR compliance, and serves 15,000+ teams from startups to Fortune 500s, with pricing from a genuinely free Starter tier up to $400-450/month Growth and custom Enterprise.
| # | Tool | Best for | Price |
|---|---|---|---|
| 1 | Équipes produit de startups à entreprises, équipes API-first voulant une documentation IA-native | — | |
| 2 |  gitbook | Développeurs | — |
| 3 | Développeurs | — | |
| 4 | Développeurs | — | |
| 5 | Développeurs | — |
Product documentation usually goes stale the moment a feature changes, because someone has to remember to update it — Documentation.AI tries to close that gap by watching your product and support signals and suggesting doc updates automatically, while als
