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Supabase vs Firebase in 2025: Why We Switched and Never Looked Back

After three years of building on Firebase, we moved our entire stack to Supabase. Here's an honest comparison — the wins, the trade-offs, and what made the decision clear.

📅 May 28, 2026⏱ 8 min read👁 0 viewsSupabaseFirebaseDatabaseEngineering

The Honest Comparison Nobody Writes

Most 'Supabase vs Firebase' articles are written by developers who've used one lightly and the other in production. We've used both, heavily, on real client projects. Here's what we actually found.

What Firebase Does Well

Firebase's real-time capabilities are genuinely excellent. If you're building a mobile app with heavy real-time requirements and don't want to think about SQL, Firebase is a reasonable choice.

Why Supabase Won

Supabase gives you a real Postgres database — with full SQL, foreign keys, joins, views, functions, and Row Level Security that's actually readable. The real-time layer handles most use cases just as well as Firebase. The auth module is solid. Storage is built in. And the self-hosting story is genuinely good.

The Migration

We migrated a mid-size CRM project from Firestore to Supabase in 3 weeks. Query performance improved by 60%. Monthly infrastructure cost dropped by 40%.

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