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Automerge

Verified Sep 2026

JSON CRDTs for collaboration

Rust-backed CRDT library that merges concurrent edits automatically: an engine of local-first collaboration.

The CRDT library from Ink & Switch: JSON-like documents that merge concurrent edits without coordination, backed by a Rust core (automerge 2/3). Powers offline-capable collaborative apps where Yjs's text focus doesn't fit.

Who it's for

Developers building local-first collaborative apps that sync JSON-like state without a server.

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Concepts in the glossary

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Automerge features

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Automerge works with