Git-based, typed content; React/Astro friendly (Thinkmill). JustJSON takes a different path: your content is plain JSON in your own repo — no account, no server, no API key — and you start in one command.
| Tool | Account | Server / DB | API key | Local-first | Typed output | Best for |
|---|---|---|---|---|---|---|
| JustJSON Local, file-based — needs no backend at all. | None | None — files on disk | None | Always (fully local) | types.ts + Astro collections | Devs who want content with zero backend |
| Keystatic Git-based, typed content; React/Astro friendly (Thinkmill). | None (git) | None (git-based) | None | Yes | Yes | Git-based teams happy to write config |
A fair-use summary of publicly documented behaviour, compiled 2026. Keystatic is a solid project — tell us if anything reads wrong. See the full comparison across all of them.