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Automerge

A JSON-like data structure (a CRDT) that can be modified concurrently by different users, and merged again automatically.

Automerge

Automerge Reviews and Details

This page is designed to help you find out whether Automerge is good and if it is the right choice for you.

Screenshots and images

  • Automerge Landing page
    Landing page //
    2023-06-02

Features & Specs

  1. Conflict Resolution

    Automerge uses CRDTs to offer automatic conflict resolution, allowing concurrent edits without manual merging.

  2. Offline Support

    Automerge enables applications to work offline by keeping track of changes locally and syncing when back online.

  3. Ease of Use

    The library provides a simple API that makes it easy to integrate into applications that require real-time collaboration.

  4. No Central Server Requirement

    Automerge allows peer-to-peer communication, which can reduce the need for a centralized server to handle document changes.

  5. Version Control

    Automatically keeps track of document history and changes, which can be useful for version control and auditing purposes.

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Videos

Automerge: a new foundation for collaboration software

Creating Local-First Collaboration Software with Automerge โ€ข Martin Kleppmann โ€ข GOTO 2023

Social recommendations and mentions

We have tracked the following product recommendations or mentions on various public social media platforms and blogs. They can help you see what people think about Automerge and what they use it for.
  • Convergence Is Not Enough
    This is apparently based on Automerge.[1] It sounds like a really good idea. Is it a good enough idea to sync MMO game clients and servers? Paper from 2012, last Automerge site update in 2025. Why isn't this everywhere? [1] https://automerge.org/. - Source: Hacker News / 17 days ago
  • CRDT vs OT: Choosing the Right Collaboration Algorithm
    Automerge (official) - Automerge project goals, JSON-like CRDT semantics, and cross-platform bindings. (automerge.org). - Source: dev.to / about 2 months ago
  • Show HN: Freenet, a peer-to-peer platform for decentralized apps
    For values that don't have a natural merge function (or where you don't want to bother writing one), would it make sense to sync update logs instead? That is: - The synced value is a history of client updates, sorted in some eventually consistent order (e.g. By hybrid logical clocks). - The user-visible value is the result of processing these updates in order, using arbitrary contract code. This is overkill for... - Source: Hacker News / 3 months ago
  • Local-First Software: Why the Future of Apps Doesn't Need the Cloud
    Libraries like Automerge and Yjs have gone from academic curiosities to production-ready tools. They handle edge cases that would have made local-first apps unreliable five years ago. - Source: dev.to / 5 months ago
  • The CRDT Dictionary: A Field Guide to Conflict-Free Replicated Data Types
    One of the most interesting things to me about CRDTs, and something that a skim of the article (with its focus on low-level CRDTs) might give the wrong impression on... Is that things like https://automerge.org/ are not just "libraries" that "throw together" low-level CRDTs. They are themselves full CRDTs, with strong proofs about their characteristics under stress. Per the Automerge website: > We are... - Source: Hacker News / 9 months ago
  • Strong Eventual Consistency โ€“ The Big Idea Behind CRDTs
    The big idea behind CRDTs is that a datastructure can naturally have many replicas synchronizing on best-effort basis. That is much closer to the physical reality than the "mainframe model" of one linear operation log (WAL, binlog, etc). The basic CRDT ideas are actually pretty easy to implement: you add some metadata, keep some history, and now you can see what is happening and be consistent across... - Source: Hacker News / 11 months ago
  • Local-first software: You own your data, in spite of the cloud
    I think I saw someone point out automerge not long ago: https://automerge.org/ Rust and JavaScript implementations, a handful of network strategies. It doesn't come with the free or paid offering that jazz.tools does, but it's pretty nice. - Source: Hacker News / about 1 year ago
  • Show HN: I rewrote my notepad calculator as a local-first app with CRDT syncing
    I launched NumPad v1 on here a few years ago, and back then it wasn't much more than a thin CodeMirror wrapper around the calculator engine I'd written. Now I've rewritten it as a PWA that supports multiple documents, persists them to IndexedDB, and has a syncing service for paying customers. Syncing is handled by Automerge[1] under the hood, which should make it relatively easy to get document sharing... - Source: Hacker News / about 1 year ago
  • Ask HN: What Are You Working On? (October 2024)
    A sqlite extension that provides a virtual table backed by an Automerge document (https://automerge.org/). I believe that there are plenty of applications that could benefit from the collaboration or sync-ability that CRDTs provide, but that don't need to manage the CRDTs directly. Moving the CRDT management into the database seems like a natural fit. It's very early, and not public anywhere, but I'd be happy to... - Source: Hacker News / almost 2 years ago
  • Comparing local-first frameworks and approaches
    Ink & Switch released automerge to automatically achieve this merge. If you have two documents you are collaboratively editing, you can use automerge to make concurrent changes. - Source: dev.to / almost 2 years ago
  • 5000x Faster CRDTs
    > The most popular, highly ergonomic, best implementations of CRDTs actually break the academic rules of CRDTs. There's a popular, highly ergonomic implementation called Automerge[0] that would beg to disagree with you. [0]: https://automerge.org/. - Source: Hacker News / almost 2 years ago
  • Using CRDTs to build collaborative Rust web applications
    If you plan to build production-grade CRDT-based software and donโ€™t want to build every piece of it by hand, I recommend Automerge as a library for handling all your CRDT needs, but itโ€™s always good to look under the hood to build intuition and understanding for the underlying concepts. - Source: dev.to / over 2 years ago
  • Figma Is a File Editor
    Take a look at https://automerge.org/ and the stack those folks are building. You're exactly right that it's a difficult balance (specifically the trick is proving commutativity for the domain-specific data of your application). But automerge (and then https://github.com/inkandswitch/peritext) show it's at least possible. Good stuff. - Source: Hacker News / about 3 years ago

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Is Automerge good? This is an informative page that will help you find out. Moreover, you can review and discuss Automerge here. The primary details have not been verified within the last quarter, and they might be outdated. If you think we are missing something, please use the means on this page to comment or suggest changes. All reviews and comments are highly encouranged and appreciated as they help everyone in the community to make an informed choice. Please always be kind and objective when evaluating a product and sharing your opinion.