Supabase Has a Free API — The Open-Source Firebase Alternative with Postgres

Supabase is an open-source Firebase alternative with a real PostgreSQL database. Auth, real-time subscriptions, storage, edge functions — all built on open-source tools. Why Supabase? Real PostgreSQL — not a document database pretending to be SQL Row-Level Security — database-level auth policies Real-time — subscribe to database changes via WebSocket Free tier — 500MB database, 1GB storage, 50K monthly active users Self-hostable — Docker Compose or Kubernetes Quick Start npm install @supabase/supabase-js import { createClient } from ' @supabase/supabase-js ' ; const supabase = createClient ( ' https://YOUR_PROJECT.supabase.co ' , ' YOUR_ANON_KEY ' ); CRUD Operations // Insert const { data , error } = await supabase . from ( ' posts ' ) . insert ({ title : ' Hello ' , content : ' World ' , user_id : userId }) . select (); // Select const { data : posts } = await supabase . from ( ' posts ' ) . select ( ' *, author:users(name, avatar) ' ) . eq ( ' status ' , ' published ' ) . order ( ' c