Open‑source Firebase alternative built on PostgreSQL. Provides realtime database, authentication, storage, and edge functions. Free tier includes 500MB database, 2GB storage, and 2GB monthly bandwidth.
Supabase is the strongest Firebase alternative. It‘s open‑source and uses standard PostgreSQL, so your data structure is transparent and migrations are easy. You get realtime subscriptions, authentication, and storage with the familiarity of SQL.
I built a note‑taking app backend with Supabase. From project creation to API generation took 3 minutes. The SQL editor let me write CREATE TABLE statements, and REST APIs were auto‑generated. Integrating the SDK with Next.js and setting up Row Level Security was intuitive.
Since it‘s plain PostgreSQL, you can export your data anytime with pg_dump—no vendor lock‑in.
Pro tip: Import existing PostgreSQL databases or export with pg_dump. You can start with the cloud service and later self‑host if needed.