Supabase vs Firebase

// Both are app backends. They overlap a lot.
// Auth, storage, functions, almost identical
// at the SDK surface.
//
// The difference shows up underneath.
//
//   Firebase  → JSON documents · Google
//   Supabase  → real Postgres · open source
//
// Pick Firebase for write-light document data.
// Pick Supabase when you want SQL, joins, or
// the option to bring your data with you.