Head-to-head
Automerge vs Yjs
Yjs leads: the AI models rank it above its rival on 1 of the 1 leaderboard they share. Based on how ChatGPT, Claude, Gemini & Grok rank both across the leaderboard they share — re-polled weekly, reasoning shown verbatim.
| Leaderboard | Automerge | Yjs |
|---|---|---|
| Best Real-time collaboration infrastructure | #3 / 9 | #2 / 9 |
Why the models rank Automerge — on best real-time collaboration infrastructure
“The best fit for genuinely local-first collaboration: offline operation is fundamental, concurrent changes merge without a central server, full history enables branching, and its transport-agnostic architecture supports durable user-controlled data.”
Why the models rank Yjs — on best real-time collaboration infrastructure
“The de facto CRDT engine for collaborative apps — battle-tested in production at scale (Notion-class editors, Evernote, JupyterLab, Serenity/AFFiNE), best-in-class performance among CRDT libraries, and the richest ecosystem of editor bindings (ProseMirror/Tiptap, CodeMirror, Slate, Monaco) plus interchangeable providers (Hocuspocus, y-sweet, y-websocket). Free, open-source, no vendor lock-in; ranked first because for the typical practitioner building collaborative editing, it delivers the hardest part (conflict-free merging) with the most proven track record.”
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Ranks from the merged 4-model leaderboards · re-polled weekly · methodology