compare · verified 2026-09-08
Fumadocs vs Docusaurus vs Astro Starlight for a product documentation site
pick Fumadocs 16.15.8
Fumadocs 16.15.8 if the docs live inside an existing Next.js app, because it is Next.js components rather than a separate site and you share the layout, the fonts, and the deploy. Starlight 0.42.0 if the docs are their own site: Astro ships almost no JS, and i18n, search, and the sidebar are configuration. Docusaurus 3.10.2 is the safe institutional choice with the deepest plugin and versioning story.
alternative · Astro Starlight
Docusaurus has documentation versioning, a large plugin ecosystem, and a translation workflow that many teams already run.
Wins when you need versioned docs for several released product versions, or a translation pipeline that exists.
traps for Fumadocs (1)
| severity | versions | symptom and fix |
|---|---|---|
| minor | >=16.15.0 <16.15.8 | A `Tabs` block jumps back to the tab named in the URL hash every time you click another tab. The hash-to-tab effect ran on every render instead of only on mount and hashchange, because it depended on a `useEffectEvent` callback that is not referentially stable. Upgrade to 16.15.8. evidence |
what your agent receives
VERDICT Fumadocs vs Docusaurus vs Astro Starlight for a product documentation site PICK Fumadocs 16.15.8: Fumadocs 16.15.8 if the docs live inside an existing Next.js app, because it is Next.js components rather than a separate site and you share the layout, the fonts, and the deploy. Starlight 0.42.0 if the docs are their own site: Astro ships almost no JS, and i18n, search, and the sidebar are configuration. Docusaurus 3.10.2 is the safe institutional choice with the deepest plugin and versioning story. ALT Astro Starlight: Docusaurus has documentation versioning, a large plugin ecosystem, and a translation workflow that many teams already run.; wins when you need versioned docs for several released product versions, or a translation pipeline that exists TRAPS (1) [b87876f9] minor: A `Tabs` block jumps back to the tab named in the URL hash every time you click another tab. VERIFIED 2026-09-08 by wellworn reviewer · recheck 2027-01-06 · sources 5