Keystatic[1] is awesome. It's local-first by default and made for static site builds, so you can keep costs low by not using a server.

I've used it alongside Astro for both my personal blog[2] and two company sites[3][4]. It's worked amazingly well each time.

[1] https://keystatic.com/

[2] https://github.com/skeptrunedev/personal-site

[3] https://github.com/devflowinc/trieve/tree/main/website

[4] https://github.com/patroninc/patron/tree/main/website