Convex vs Firebase (2026): Reactive Backend Compared
By ToolVS Editorial · Updated April 10, 2026 · 9 min read
Convex
Best TypeScript-First Reactive Backend
- End-to-end TypeScript (schema to client)
- Reactive queries — UI auto-updates
- ACID transactions built-in
- No SDK sprawl — single API
- Newer ecosystem (less community content)
- No React Native first-class support
Pricing: Free → Starter $25/mo → Professional $100/mo
Try Convex Free →Firebase
Best for Mobile & Google Ecosystem
- Massive ecosystem and documentation
- Native iOS, Android, Flutter SDKs
- Google Cloud integration (BigQuery, etc.)
- Battle-tested at billions-of-users scale
- NoSQL — no relational queries
- Vendor lock-in to Google
Pricing: Spark free → Blaze pay-as-you-go
Get Started with Firebase →Score Breakdown
Full Comparison Table
| Category | Convex | Firebase |
|---|---|---|
| Data Model | Document (TypeScript-typed) | NoSQL (Firestore/RTDB) |
| TypeScript Support | ⭐⭐⭐⭐⭐ First-class | ⭐⭐⭐ Third-party types |
| Real-time Updates | Reactive queries (auto) | onSnapshot listeners |
| ACID Transactions | ✅ Built-in | ⚠️ Limited |
| Auth Built-in | ✅ Yes | ✅ Yes (Firebase Auth) |
| File Storage | ✅ Yes | ✅ Firebase Storage |
| Mobile SDKs | Limited | ✅ iOS, Android, Flutter |
| Vendor Lock-in | Low | High (Google) |
| Open Source | ✅ Partially | ❌ No |
| Pricing Model | Usage-based + tiers | Spark free + Blaze PAYG |
| Cold Starts | Fast (always warm) | Occasional |
| Maturity | New (2022-) | Mature (2012-) |
Regret Index
Which do you use?
Who Should Choose What?
Choose Convex if: You're building a TypeScript web app that needs real-time collaboration (chat, docs, dashboards). Convex's reactive queries eliminate the complexity of managing WebSocket subscriptions manually.
Choose Firebase if: You're building a mobile app (iOS/Android/Flutter) that needs battle-tested BaaS with push notifications, crash reporting, and deep Google Cloud integration at any scale.
FAQs
Is Convex better than Firebase?
Convex offers better TypeScript integration, automatic consistency, and a cleaner developer experience. Firebase has a larger ecosystem and Google Cloud integration. Convex is newer but growing fast.
Does Convex have a free tier?
Yes. Convex free tier includes 1GB database, 1GB file storage, 1M function calls/month, and 500 concurrent connections — sufficient for small apps.
What is Convex best for?
Convex excels at real-time collaborative apps (docs, chat, whiteboards), where its reactive queries auto-update the UI without manual subscriptions or polling.
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Last updated: April 10, 2026