SingleStore vs RxDB
A detailed comparison to help you choose between SingleStore and RxDB.
Quick Verdict
3.8/5
SingleStore
348 reviews
3.9/5
RxDB
336 reviews
RxDB is rated higher (3.9 vs 3.8). SingleStore (formerly MemSQL) is a cloud-native database combining OLTP and OLAP in a single system. Handles real-time analytics and transactions without ETL. Used by financial services and gaming companies. 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.
SingleStore Real-time analytics and transactions in one database | RxDB Reactive database for JavaScript apps with real-time sync | |
|---|---|---|
| Overview | ||
| Rating | 3.8 (348 reviews) | 3.9 (336 reviews)✓ |
| Pricing model | freemium | free |
| Starting price | Free tier available | Free |
| Best for | Financial services, gaming, and analytics companies needing real-time queries across both transactions and analytics | JavaScript/TypeScript developers building offline-capable apps requiring real-time data reactivity across multiple browser contexts. |
| Tags | ||
| Tags | free tiermanaged optioneu datacenterus datacenterapi access | free tieropen source |
| Visit SingleStore → | Visit RxDB → | |
SingleStore
Pros
- + HTAP — handles both transactions and analytics
- + Real-time query performance
- + Free shared tier available
Cons
- - Not suitable for simple CRUD apps
- - Complex pricing at scale
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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