Supabase Review (2026): The Open-Source Firebase Killer, Matured at Last?

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Supabase Review (2026): The Open-Source Firebase Killer, Matured at Last?

We built an app backend with Supabase to test whether it truly replaces Firebase.

What Supabase Is

An open-source Firebase alternative built on Postgres — database, auth, storage, edge functions, and realtime, all in one platform.

The Good

Real Postgres, not locked-in. Standard SQL, relations, and full power.
Generous free tier. Two projects, good quotas.
Great DX. Auto-generated APIs, realtime subscriptions, and an excellent dashboard.
Self-hostable if you outgrow the cloud.

The Bad

Scaling can get pricey on cloud at high volume.
AWS dependencies under the hood on cloud plan.
Occasional breaking changes across major versions.
Realtime is solid but not the friendliest to tune.

Supabase vs Firebase

Supabase favors SQL/Postgres, open source, more portable. Firebase favors NoSQL, deeper one-click integrations, mature at Google scale. If you like relational data, Supabase wins.

Final Verdict

8.5/10 — Excellent open-source backend. For relational apps it beats Firebase on flexibility and portability. Free tier is real. Highly recommended.

Supabase Review (2026): The Open-Source Firebase Killer, Matured at Last?