Build full-stack apps with
ZERO backend.
The browser is the server. Local-first, peer-to-peer, CRDT-powered database platform. Replace your backend, database, and auth system entirely.
Works seamlessly with your favorite frameworks
Developer Experience First
A powerful, fully-typed SDK that feels like magic. No configuration required.
Everything you need. Nothing you don't.
Stop managing infrastructure. ZerithDB provides the entire data layer right inside the client.
Local-First Database
Data lives in IndexedDB. Instant reads, instant writes, and full offline capabilities by default.
Real-time P2P Sync
Browsers connect directly via WebRTC. No central server bottleneck. Zero-latency data transfer.
CRDT Conflict Resolution
Powered by Yjs. Mathematical guarantee of eventual consistency without annoying merge conflicts.
Passwordless Auth
Ed25519 cryptographic keypairs generated in-browser. You are identified by your public key. No login servers.
Zero Backend
No database provisioning, no API routes to write, no GraphQL resolvers. Just import and build.
TypeScript Native
End-to-end type safety. Your database schemas are strictly typed from creation to query.
How it works
A simple, powerful data flow entirely in the browser.
Write Locally
Call insert(). Data is instantly persisted to IndexedDB. The UI updates in 0ms.
Convert to CRDT
ZerithDB translates the JSON document into a highly compressed binary CRDT delta.
Sync P2P
The delta is cryptographically signed and broadcasted via WebRTC to connected peers.
Unbeatable Latency
Because data never leaves the device for reads/writes, ZerithDB operates at the speed of RAM and SSD, not the speed of the internet.
Average Write Latency (ms)
The Modern Data Layer
See how ZerithDB compares to traditional architectures.
| Feature | Firebase | Supabase | ZerithDB |
|---|---|---|---|
| Backend Required | Yes (Managed) | Yes (Managed) | No (Browser-only) |
| Offline-First | Limited / Add-on | Via external libs | Native Default |
| Sync Architecture | Client-Server | Client-Server | Peer-to-Peer |
| Conflict Resolution | Last-write-wins | PostgreSQL rules | CRDTs (Deterministic) |
| Vendor Lock-in | High | Low (Open Source) | None (Runs in client) |
Built for the next generation of apps
Collaborative Tools
Build Figma-like or Notion-like experiences where multiple users edit the same document seamlessly without conflict.
Offline-First Applications
Applications for field workers, travelers, or unstable networks that must never show a loading spinner.
Local Productivity Apps
Notes, to-do lists, and personal wikis that guarantee 100% privacy because data never hits a central database.
Multiplayer Games & Systems
Share game state or real-time presence (cursors, selections) across peers instantly via WebRTC data channels.
Start building without a backend today.
Open source. Developer first. Ready for production.
Interactive Peer Identity Social Graph
Real-time visualization of peer trust and network connectivity within ZerithDB ecosystems.