rocicorp/mono

Health v2 · maintenance only

Adoption not part of the score

3369 stars · 159 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

Zero is a general-purpose sync engine for the web that syncs slices of a Postgres database into a client-side local datastore, letting queries resolve instantly from cache while syncing in the background. The monorepo also contains Replicache, the underlying client-side sync library, and ZQL, a TypeScript query language with incremental view maintenance.

Use cases

• build web apps with instant, local-first reads and writes
• sync only the data a user has permission to see from Postgres
• query client-side cached data with a SQL-like TypeScript API
• avoid writing HTTP APIs and state management for data fetching
• make large datasets (millions of rows) feel fast in the browser
• keep UI reactively updated as server data changes

When to choose

• you want Linear/Figma-style instant UX backed by Postgres
• your app has complex permissions and too much data to sync wholesale
• you use React, SolidJS, or React Native and want reactive queries
• you want an open-source, self-hostable sync layer

When to avoid

• your backend is not Postgres
• you need heavy server-side aggregation or column-subset queries
• you want a fully managed proprietary solution with vendor SLAs
• your data is write-heavy with strict server-side transactional requirements

Facets

library · maturity active

caching database orm state-management middleware web-development frontend databases developer-tools browser cross-platform sync-engine client-side-datastore incremental-view-maintenance postgres-replication local-first zql reactive-queries real-time typescript nodejs web-server

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markdown · JSON · MCP: product_card(name="rocicorp/mono")