Google Firebase vs Supabase

Which tool offers lower real-world costs and fewer overage traps? Here is the unvarnished 2026 breakdown.

Google Firebase

High Risk

Google's NoSQL real-time document database & mobile app backend

Starting Price $0 Spark Plan / Pay-as-you-go Blaze Plan Per read, write, and delete operations in Cloud Firestore

Free Tier Allowance 1GB storage, 50k reads/day, 20k writes/day

⚠️ Top Trap Risk "The infamous 'Infinite Loop Read Disaster': an un-memoized React hook can trigger millions of reads and a $1,000+ overnight bill"

View Full Google Firebase Audit → Visit ↗

Supabase

Medium Risk

Open source Firebase alternative built on dedicated PostgreSQL instances

Starting Price $0 / Free tier | $25/mo Pro Monthly tier + Overages (Compute hours + Egress + Storage)

Free Tier Allowance 2 free projects, 500MB database, 1GB storage, 2GB bandwidth (pauses after 7 days of inactivity)

⚠️ Top Trap Risk "Database automatically pauses on Free tier after 1 week without active queries"

View Full Supabase Audit → Visit ↗

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