A developer who shipped two production apps in 2026 — one with Firebase, one with Supabase — shares an honest comparison across database architecture, real-time, auth, storage, pricing, and developer experience. Supabase wins for relational data, cost predictability, TypeScript type safety, and vector search via pgvector. Firebase still leads for offline-first mobile apps, Google Cloud integration, and gaming. The verdict: Supabase is the better default for most web applications today, while Firebase remains the right call for specific mobile and gaming scenarios.
Table of contents
The Core Difference Nobody Explains ClearlyDatabase Architecture and QueryingReal-Time: Where Firebase Still Has the EdgeAuthentication: Supabase Quietly WinsStorage: Effectively a TiePricing: Where Firebase Surprises YouDeveloper Experience and Local DevelopmentAI and Vector Search in 2026When to Choose FirebaseWhen to Choose SupabaseThe Honest VerdictSort: