{"slug":"yjs","name":"Yjs","domain":null,"verdict":"As of 2026-07-19, ChatGPT, Claude, Gemini, Grok collectively rank Yjs #2 of 9 for real-time collaboration infrastructure. Source: https://modelsagree.com/product/yjs (modelsagree.com, CC BY 4.0).","best_rank":2,"categories":1,"brief":{"category":"best-real-time-collaboration-infrastructure","title":"Best Real-time collaboration infrastructure","rank":2,"of":9,"top":"Liveblocks","day":"2026-07-20","why":[{"t":"Battle-tested high-performance CRDT engine","m":["Claude","Gemini","ChatGPT","Grok"],"q":"battle-tested in production at scale"},{"t":"Richest ecosystem of editor bindings","m":["Claude","Gemini","ChatGPT","Grok"],"q":"the richest ecosystem of editor bindings"},{"t":"Open-source with no vendor lock-in","m":["Claude","Gemini","ChatGPT","Grok"],"q":"Free, open-source, no vendor lock-in"},{"t":"Offline support and flexible hosting","m":["ChatGPT","Grok"],"q":"offline-first, flexible self-hosting or managed backends"}],"gap":[{"t":"Turnkey managed collaboration infrastructure","m":["ChatGPT","Grok","Claude","Gemini"],"q":"Premier turnkey commercial platform providing managed multiplayer APIs"},{"t":"Built-in comments and notifications","m":["ChatGPT","Grok","Claude","Gemini"],"q":"presence, comments, notifications, AI copilot primitives"},{"t":"Minimal setup and faster shipping","m":["ChatGPT","Grok","Claude","Gemini"],"q":"a small team can ship Figma-style multiplayer features in days rather than months"}],"fix":[{"t":"Own hosting, persistence, auth, scaling","m":["ChatGPT","Claude","Gemini","Grok"],"q":"you still own hosting, persistence, auth, and scaling of the sync backend"},{"t":"Significant backend setup required","m":["ChatGPT","Gemini","Grok"],"q":"Requires significant setup for backend/persistence/scaling"},{"t":"API has a learning curve","m":["Claude"],"q":"its API (relative positions, subdocuments) has a real learning curve"}]},"entries":[{"slug":"best-real-time-collaboration-infrastructure","title":"Best Real-time collaboration infrastructure","rank":2,"of":9,"score":18,"appearances":4,"modelRanks":{"ChatGPT":2,"Claude":1,"Gemini":1,"Grok":2},"reason":"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.","reasons":[{"model":"Claude","reason":"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."},{"model":"Gemini","reason":"Industry-standard open-source CRDT framework offering exceptional performance, zero vendor lock-in, and broad binding support for rich-text editors and canvases."},{"model":"ChatGPT","reason":"The strongest open-source foundation, with excellent CRDT performance, mature editor integrations, offline support, interoperable providers, and freedom to choose hosting, transport, and persistence; near-tied with Liveblocks when infrastructure ownership matters."},{"model":"Grok","reason":"Dominant open-source CRDT library with massive ecosystem (Tiptap, ProseMirror, CodeMirror bindings), smallest bundle, battle-tested for Google Docs-like editing, offline-first, flexible self-hosting or managed backends, highest adoption and maturity for custom collaborative editors."}],"fixes":[{"model":"ChatGPT","fix":"It is a synchronization engine rather than a complete production service, so authentication, persistence, scaling, monitoring, and abuse controls remain your responsibility."},{"model":"Claude","fix":"It's a library, not a service — you still own hosting, persistence, auth, and scaling of the sync backend, and its API (relative positions, subdocuments) has a real learning curve."},{"model":"Gemini","fix":"Requires self-hosting and scaling custom WebSocket relay infrastructure and document persistence layers."},{"model":"Grok","fix":"Requires significant setup for backend/persistence/scaling (not plug-and-play for non-expert teams)."}],"updated":"2026-07-19","api":"https://modelsagree.com/api/v1/best/best-real-time-collaboration-infrastructure.json"}],"page":"https://modelsagree.com/product/yjs","check":"https://modelsagree.com/check?q=Yjs","updated":"2026-07-21T04:28:25.186Z","attribution":"modelsagree.com, CC BY 4.0"}