Why people switch: Lock-in plus unpredictable scaling costs; Postgres is a safer floor.
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Supabase
Postgres with auth, realtime, storage, and edge functions.
Apache-2.0self-hostable -
Appwrite
Batteries-included backend with solid SDK coverage.
BSD-3self-hostable -
PocketBase
One Go binary with SQLite; perfect for small products.
MITself-hostable