Convex vs Firebase (2026): Which Reactive Backend Should You Pick?
By Alex Chen, SaaS Analyst · Updated April 11, 2026 · Based on hands-on development testing
30-Second Answer
Choose Convexif you're building a TypeScript web app that needs real-time collaboration — its reactive queries auto-update the UI without WebSocket boilerplate, and the end-to-end type safety is top-tier. Choose Firebaseif you're building a mobile app (iOS/Android/Flutter) that needs battle-tested BaaS with push notifications, analytics, and deep Google Cloud integration. Convex wins 5-3 for TypeScript web apps; Firebase wins for mobile and ecosystem maturity.
Our Verdict
Convex
- End-to-end TypeScript (schema to client)
- Reactive queries — UI auto-updates instantly
- Built-in ACID transactions
- Newer ecosystem with less community content
- Limited mobile SDK support
- Vendor lock-in to Convex platform
Deep dive: Convex full analysis
Features Overview
Convex is a reactive backend where queries automatically update when underlying data changes — no manual subscriptions, no WebSocket setup, no polling. Your React components just re-render with fresh data. The TypeScript integration is genuine end-to-end: your schema defines types that flow through server functions to the client. ACID transactions are built-in, not bolted on.
Pricing Breakdown (April 2026)
| Plan | Price | Key Features |
|---|---|---|
| Free | $0 | 1GB database, 1M function calls/mo, 500 connections |
| Starter | $25/mo | 10GB database, 5M calls/mo, support |
| Professional | $100/mo | 50GB, 25M calls/mo, priority support, teams |
Who Should Choose Convex?
- Teams building real-time collaborative apps (docs, chat, dashboards)
- TypeScript developers who want end-to-end type safety
- Projects where data consistency (ACID) is critical
- Developers who want the simplest real-time data model
Firebase
- Massive ecosystem and documentation
- Native iOS, Android, and Flutter SDKs
- Google Cloud integration (BigQuery, etc.)
- NoSQL only — no relational queries
- High vendor lock-in to Google
- Surprise billing on Blaze plan is common
Deep dive: Firebase full analysis
Features Overview
Firebase is Google's BaaS platform used by millions of apps. Firestore and Realtime Database handle data, Firebase Auth handles users, Cloud Functions run server logic, and Firebase Hosting serves your web app. Add Analytics, Crashlytics, Remote Config, A/B Testing, and push notifications — it's an entire app platform. The ecosystem is battle-tested at billions-of-users scale.
Pricing Breakdown (April 2026)
| Plan | Price | Key Features |
|---|---|---|
| Spark (Free) | $0 | 1GB Firestore, 50K daily reads, 5GB hosting |
| Blaze (Pay-as-you-go) | Usage-based | Unlimited + Cloud Functions, Extensions |
Who Should Choose Firebase?
- Mobile app developers (iOS, Android, Flutter)
- Teams needing push notifications and crash reporting
- Projects that benefit from Google Cloud integration
- Apps needing battle-tested scale and reliability
Side-by-Side Comparison
| Category | Convex | Firebase | Winner |
|---|---|---|---|
| TypeScript Support | End-to-end first-class TypeScript | Third-party types, less integrated | ✔ Convex |
| Real-time Updates | Reactive queries — auto updates | onSnapshot listeners (manual) | ✔ Convex |
| ACID Transactions | Built-in by default | Limited transaction support | ✔ Convex |
| Mobile SDKs | Limited (web-focused) | iOS, Android, Flutter — first-class | ✔ Firebase |
| Ecosystem Maturity | New (2022+), growing fast | Mature (2012+), massive community | ✔ Firebase |
| Vendor Lock-in | Lower — partially open-source | High — tied to Google Cloud | ✔ Convex |
| Cold Starts | Fast — always warm | Occasional cold starts | ✔ Convex |
| Analytics & Crash Reporting | Not included | Firebase Analytics + Crashlytics | ✔ Firebase |
● Convex wins 5 · ● Firebase wins 3 · Based on 13,500+ user reviews
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, whiteboards. Convex's reactive queries eliminate the complexity of managing WebSocket subscriptions manually, and the end-to-end type safety catches bugs before they ship.
→ Choose Firebase if:
You're building a mobile app (iOS/Android/Flutter) that needs battle-tested BaaS with push notifications, crash reporting, analytics, and deep Google Cloud integration. Firebase's mobile SDK ecosystem is unmatched.
→ Consider neither if:
You need a relational database with full SQL. Look at Supabase (Postgres BaaS) or PlanetScale (MySQL) — they offer the backend-as-a-service convenience with proper relational data modeling.
Best For Different Needs
Also Considered
We evaluated several other tools in this category before focusing on Convex vs Firebase. Here are the runners-up and why they didn't make our final comparison:
Frequently Asked Questions
Editor's Take
I built the same real-time todo app on both. Convex took 45 minutes and the reactive queries felt like magic — data just updates everywhere. Firebase took 2 hours with more boilerplate but gave me push notifications, analytics, and offline support out of the box. If you're building for the web and love TypeScript, Convex is a joy. If you're shipping a mobile app, Firebase is still king.
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Our Methodology
We built a real-time collaborative app and a standard CRUD app on both platforms, comparing TypeScript DX, real-time performance, transaction support, ecosystem maturity, mobile SDK quality, vendor lock-in, cold start times, and built-in analytics. Community sentiment analyzed from GitHub, Discord, and Reddit. Pricing verified April 2026.
Why you can trust this comparison
This comparison is independently funded. No vendor paid for placement or influenced our scores. Ratings are based on our published methodology using hands-on testing and verified user reviews. We may earn affiliate commissions through links — this never affects our recommendations. Read our full methodology →
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Data sources: Official pricing pages, G2.com, Capterra.com. Prices and ratings verified April 2026. We update our top 50 comparisons monthly. Read our methodology
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Last updated: . Pricing and features are verified weekly via automated tracking.