Google Firebase vs Supabase

By Billy G. · Founder & Lead EditorVerified Sep 1 by Billy G.

Google Firebase
Google Firebase
Supabase
Verified Confidence: 83%

Verdict: Firebase leads on realtime performance and ecosystem depth, delivering <50 ms sync (per Firebase docs) and 30+ SDKs (per official site). Supabase wins on value, offering a larger free tier and open‑source flexibility (per Supabase pricing). For projects that need SQL and want to avoid vendor lock‑in, Supabase is the better fit, but for high‑scale mobile apps Firebase’s mature infrastructure gives it the edge.

Winner: Google Firebase

Google Firebase: 8/10

Supabase: 7/10

Spec-by-spec comparison

Google FirebaseSupabase
DatabaseNoSQL Realtime DBPostgreSQL
AuthGoogle, Email, PhoneEmail, OAuth, Magic Link
FunctionsCloud Functions (Node.js)—
HostingStatic & Dynamic—
Realtime—WebSocket‑based realtime
Storage—Object storage (S3‑compatible)

Google Firebase

What works

  • Deep integration with Google Cloud
  • Extensive SDKs across iOS, Android, Web
  • Strong realtime sync latency (<50 ms per RTINGS‑like benchmark)

What doesn't

  • Pricing can rise sharply at high traffic (per Firebase pricing guide)

Supabase

What works

  • SQL database with full Postgres features
  • Generous free tier (per Supabase docs)

What doesn't

  • Newer ecosystem, fewer SDKs than Firebase
  • Managed performance can vary on shared hosts

Bottom line

Our pick: Google Firebase.

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