Pg_CRDT – CRDTs in Postgres Using Automerge

In plain words

Pg_CRDT brings conflict-free replicated data type functionality to PostgreSQL through integration with Automerge. It enables developers to build applications where data changes can be made independently across multiple instances and merged automatically without conflicts. The tool is designed for teams building distributed systems or collaborative applications that need PostgreSQL's reliability combined with conflict resolution capabilities. It's available as an open-source project on GitHub.

written from the facts on this page · September 2026

From the sources

pg_crdt is an experimental extension adding support for conflict-free replicated data types (CRDTs) in Postgres. CRDTs are decentralized data structures that can safely be replicated and synchronized across multiple computers/nodes. They are the enabling technology for collaborative applications like Notion and Figma. The original implementation of this library was relatively naive - we used the Automerge's Rust libary to implement a CRDT as a data type. This had a major limitation: frequently updated CRDTs produce a lot of WAL and dead tuples. The new implementation improves on this by taking advantage of an advanced in-memory feature in Postgres called an "expanded datum", which can be…from github.com

• 
  Pg_CRDT – an experimental CRDT extension for Postgres2022 · supabase.com · ▲296

  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 be). We’re considering many options for offline-sync/support and, while CRDTs will undoubtedly factor in, we’re not sure if this is the right approach." [0] GitHub repo: https://github.com/supabase/pg_crdt [1] Blog post:…

• 
  Pg_replicate – Build Postgres replication applications in Rust2024 · github.com · ▲216

  A high-performance Postgres replication engine written in Rust. Embed it in your Rust application or run it as a standalone binary. - supabase/etl

• 
  Domain-tailored CRDTs for collaboration without server involvement2018 · archagon.net · ▲158
• 
  Open source, logical multi-master PostgreSQL replication2025 · github.com · ▲151

  Logical multi-master PostgreSQL replication. Contribute to pgEdge/spock development by creating an account on GitHub.

• WC
  Working code for Operational Transformation/CRDT hybrid2017 · medium.com · ▲130
• 
  Open Source PostgreSQL Studio2021 · supabase.com · ▲407

  Powerful PostgreSQL tool is now open source for self-hosting

• 
  /dev/null▲472

  a social network for devs

  Dev tools · 2d ago · dev-null.sh

• 
  Whiteboard (YC W26) – an open-source IDE for thoughtful software design▲423

  open-source IDE for thoughtful software design. Contribute to devdotfast/whiteboard development by creating an account on GitHub.

  Dev tools · 27d ago · github.com

• 
  Reladraw – A diagram language where you decide where to place things▲411

  Contribute to reladraw/reladraw development by creating an account on GitHub.

  Dev tools · 25d ago · github.com

• 
  OpenBot▲362

  Grok Bot alternative: free, local, open-source, multiplayer

  Dev tools · 22d ago · openbot.run

• 
  Talanoa▲340

  Hi HN, I’m a fullstack developer, and honestly, I’ve lost count of how many side projects I’ve worked on over the years. But one idea kept coming back to me: a different kind of email client. It first came to me in 2014: “What if we could handle emails more like conversations?” Every year, I’d revisit this concept in my “Build Notes.” Ten years later, no one had built exactly what I had in mind — so I finally decided to do it myself. That’s how Talanoa was born. I wanted something focused on people, not timelines. I was tired of marking messages as unread just to remember to reply later, or…

  Dev tools · 20d ago · talanoa.email

• 
  CoreSpeed▲332

  One MCP for everything your agents need: apps, memory, tools

  Dev tools · 27d ago · corespeed.io

• 
  I built a hardware processor that runs Python▲983

  Hi everyone, I built PyXL — a hardware processor that executes a custom assembly generated from Python programs, without using a traditional interpreter or virtual machine. It compiles Python -> CPython Bytecode -> Instruction set designed for direct hardware execution. I’m sharing an early benchmark: a GPIO test where PyXL achieves a 480ns round-trip toggle — compared to 14-25 micro seconds on a MicroPython Pyboard - even though PyXL runs at a lower clock (100MHz vs. 168MHz). The design is stack-based, fully pipelined, and preserves Python's dynamic typing without static type restrictions.…

  Dev tools · 2025 · runpyxl.com

• 
  Unsure Calculator – back-of-a-napkin probabilistic calculator▲930

  The Unsure Calculator is an online tool that lets you calculate with numbers you’re not sure about.

  Life & fun · 2025 · filiph.github.io

• 
  I built an AI that turns GitHub codebases into easy tutorials▲923

  https://the-pocket.github.io/Tutorial-Codebase-Knowledge/

  AI · 2025 · github.com

• 
  Whatting▲898

  The iPad diary, just for you

  Work · 2025 · whatting.com

• 
  Strawberry▲859

  Browser with AI companions that automate web tasks

  AI · 2025 · strawberrybrowser.com

• 
  Peek▲828

  AI personal finance coach that guides you through decisions

  Work · 2025 · peek.money