Pg_CRDT – an experimental CRDT extension for Postgres

In plain words

Pg_CRDT is an experimental PostgreSQL extension that adds support for Conflict-free Replicated Data Types (CRDTs), compatible with Yjs, Yrs, and Automerge. It is designed for developers exploring offline synchronization and collaborative data management in databases. The extension remains experimental and has not been released on the Supabase platform, as the team continues evaluating approaches to offline-sync support.

written from the facts on this page · September 2026

From the sources

Embedding Yjs and Automerge into Postgres for collaborative applications.

Today we're open-sourcing an EXPERIMENTAL extension for CRDTs, pg_crdt . The GitHub repo is here . There are instructions for running it locally in the README. When we released the new multiplayer features for our Realtime engine, it took 30 minutes for someone to ask if we'd add CRDT support. Anyone from Supabase here, do you have any plans to build in support for CRDT toolkits such as Yjs or AutoMerge for these features? It would make working with them so much easier if there was a plug and play backend. pg_crdt has not been released onto the Supabase platform (and it may never be). We're considering many options for offline-sync/support and, while CRDTs will undoubtedly factor in, we're…from supabase.com

In the maker’s words, at launch

This is an experimental extension for CRDTs, pg_crdt: GitHub repo[0]. It supports Yjs/Yrs and Automerge. The linked blog post [1] describes how we're thinking about this extension in a Supabase context. I want to emphasise this part: "pg_crdt has not been released onto the Supabase platform (and it may never…

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