---
title: "Zero"
description: "Query-driven sync engine that streams a subset of your Postgres data to the client and keeps reactive queries live with optimistic writes."
canonical: "https://vibing.inc/library/zero-vg-0930"
category: "Dev Utilities & Vibe-Coding Tooling"
subcategory: "Local-first & sync"
license: "open-source"
author: "Rocicorp (@rocicorp)"
source: "https://zero.rocicorp.dev"
---

# Zero
Query-driven sync engine that streams a subset of your Postgres data to the client and keeps reactive queries live with optimistic writes.
## Facts
- Source: https://zero.rocicorp.dev
- Category: Dev Utilities & Vibe-Coding Tooling / Local-first & sync
- Author: Rocicorp (@rocicorp)
- Licence: open-source
- Tags: sync, postgres, reactive, local-first
## Why it's a gem
From the Replicache team; you write queries, it handles the entire cache and rollback.
---
Listed in The Vibeary: https://vibing.inc/library/zero-vg-0930 · JSON: https://vibing.inc/api/public/library/gems/zero-vg-0930