Maybe
Simplenote? It's a "free" cloud service by Automattic (the people behind WordPress?) that you can access by browser or by their own (Electron behemoth) Windows app, or their Android app, but it can also be synchronized with
CintaNotes (free and payware, I think even the free version will sync with Simplenote now) and
ResophNotes (free, mentioned by wraith808 of this parish) on Windows, and with
Glance Note on Android. Certainly CintaNotes and Glance Note, and I think ResophNotes, keep their own local databases.
It's possible to use Simplenote collaboratively.
Big caveat; as a cloud service, you are at the mercy of their policies. The ResophNotes site has a note that Simplenote might remove the API for third parties, though that hasn't happened yet, as far as I know. Also, at present anyway, you can export from Simplenote to plain text files.