Supabase

Supabase is an open-source backend platform often described as a Firebase alternative built on PostgreSQL. It provides a full suite of backend services including a hosted Postgres database, instant REST and GraphQL APIs, authentication with social login support, file storage, edge functions, and real-time subscriptions. With a generous free tier, excellent documentation, and native integrations with modern frameworks, Supabase is the go-to backend for developers building web and mobile applications.