Supabase vs RxDB
A detailed comparison to help you choose between Supabase and RxDB.
Quick Verdict
4.0/5
Supabase
92 reviews
3.9/5
RxDB
336 reviews
Supabase is rated higher (4.0 vs 3.9). Supabase is a backend-as-a-service platform providing PostgreSQL databases, real-time subscriptions, authentication, and storage. Built for developers who want PostgreSQL's power without vendor lock-in. RxDB is a real-time, offline-first NoSQL database for JavaScript applications. Works in the browser, Node.js, React Native, and Electron. Syncs with CouchDB, Firestore, and others.
Supabase Open-source Firebase alternative with PostgreSQL | RxDB Reactive database for JavaScript apps with real-time sync | |
|---|---|---|
| Overview | ||
| Rating | 4.0 (92 reviews)✓ | 3.9 (336 reviews) |
| Pricing model | freemium | free |
| Starting price | Free tier available | Free |
| Best for | Teams building web/mobile apps who prefer PostgreSQL's relational model and want to avoid vendor lock-in. | JavaScript/TypeScript developers building offline-capable apps requiring real-time data reactivity across multiple browser contexts. |
| Specifications (entry plan) | ||
| CPU cores | 0 vCPU | — |
| RAM | 0 GB | — |
| Storage | 0 GB | — |
| Bandwidth | 0 TB/mo | — |
| SLA uptime | 99.9% | — |
| Data-center count | 12 | — |
| Features | ||
| IPv6 | ||
| DDoS protection | ||
| Automated backups | ✓ | |
| Snapshots | ||
| Managed option | ||
| Bare metal | ||
| GPU available | ||
| S3-compatible | ||
| Hourly billing | ||
| Free tier | ✓ | |
| Data-center locations | ||
| Regions | United StatesUnited KingdomGermanySingaporeAustralia | — |
| Tags | ||
| Tags | free tiermanaged options3 compatibleeu datacenterus datacenterapac datacenterapi accessopen source | free tieropen source |
| Visit Supabase → | Visit RxDB → | |
Supabase
Pros
- + Use standard PostgreSQL with full SQL support
- + Self-host or run on managed infrastructure
- + Real-time subscriptions with minimal latency
- + Built-in authentication and row-level security
- + Free tier sufficient for prototyping
Cons
- - Smaller ecosystem and community compared to Firebase
- - Self-hosting requires DevOps knowledge
- - Scaling to high concurrency requires manual tuning
RxDB
Pros
- + Build reactive queries with RxJS observables for live data updates
- + Sync data across tabs, devices, and optional cloud backend
- + Work completely offline with automatic conflict resolution
- + Use multiple storage engines via plugins for different environments
Cons
- - Steeper learning curve for developers unfamiliar with RxJS reactive patterns
- - Self-hosted sync server setup required for cross-device features
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