Supabase — #1 Alternative to Firebase
Open-source Postgres Backend-as-a-Service with Auth, Realtime, Storage, and Edge Functions
Gives every project a dedicated, unthrottled PostgreSQL database paired with Row-Level Security (RLS), auto-generated REST/GraphQL APIs, S3 storage, and pgvector.
License: Apache-2.0 · Pricing: Open Core · Compare all Firebase alternatives · Official Website