sql.js
The premium Open Source alternative to Firebase Realtime Database
🎯 Best for:Web applications requiring complex relational queries without a backend server.
What is sql.js?
Replaces server-side database dependencies by running a full SQLite engine in the browser via WebAssembly. Enables offline-first applications to execute complex SQL queries on local data buffers.
Tech Stack
JavaScriptDatabase & Storage
Why sql.js?
- • Client-side execution
- • SQLite compatibility
- • No server infrastructure
Limitations
- • Large WASM binary size
- • Browser memory limits
- • No native persistence
3/5/2026
Last Update
1,107
Forks
140
Issues
Other
License
Financial Leak Detected
Stop the "SaaS Tax"
Your team could be burning cash. Switching to sql.js instantly boosts your runway.
Competitor Cost
-$1,440
/ year (est. based on Firebase Realtime Database)
Self-Hosted
$0
/ year
Team Size10 Users
150+
SAVE 100%