{"slug":"best-real-time-collaboration-infrastructure","title":"Best Real-time collaboration infrastructure","question":"What are the best real-time collaboration infrastructure in 2026?","verdict":"As of 2026-07-19, ChatGPT, Claude, Gemini and Grok collectively rank Liveblocks #1 for real-time collaboration infrastructure on ModelsAgree. The models' case: The strongest turnkey choice for most web teams: managed low-latency sync, presence, conflict-free storage, Yjs support, comments, notifications, offline recovery,…. The models' main caveat: Usage-based pricing and platform dependence make it a poor fit for teams requiring full infrastructure control or predictable high-volume costs.. The strongest alternative is Yjs — The de facto CRDT engine for collaborative apps — battle-tested in production at scale (Notion-class editors, Evernote, JupyterLab, Serenity/AFFiNE),…. Not unanimous: Claude picks Yjs; Gemini picks Yjs. Source: https://modelsagree.com/best/best-real-time-collaboration-infrastructure (modelsagree.com, CC BY 4.0).","category":"Realtime","url":"https://modelsagree.com/best/best-real-time-collaboration-infrastructure","updated":"2026-07-19","models":["ChatGPT","Claude","Gemini","Grok"],"consensus":"2 of 4 models rank Liveblocks the top pick","disagreement":"Claude picks Yjs; Gemini picks Yjs","combined":[{"rank":1,"product":"Liveblocks","domain":null,"score":18,"appearances":4,"modelRanks":{"ChatGPT":1,"Claude":2,"Gemini":2,"Grok":1},"reason":"The strongest turnkey choice for most web teams: managed low-latency sync, presence, conflict-free storage, Yjs support, comments, notifications, offline recovery, polished React tooling, and a global edge network eliminate substantial backend work."},{"rank":2,"product":"Yjs","domain":null,"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."},{"rank":3,"product":"Automerge","domain":null,"score":6,"appearances":3,"modelRanks":{"ChatGPT":4,"Claude":4,"Gemini":4},"reason":"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."},{"rank":4,"product":"Ably","domain":"ably.com","score":4,"appearances":2,"modelRanks":{"ChatGPT":3,"Claude":5},"reason":"Exceptionally proven global realtime transport with strong reliability guarantees, broad SDK coverage, and useful collaboration primitives through Spaces and LiveObjects; especially compelling when massive connection scale and operational assurance outweigh turnkey editing features."},{"rank":5,"product":"Cloudflare Durable Objects","domain":"cloudflare.com","score":3,"appearances":1,"modelRanks":{"Claude":3},"reason":"The best primitive for stateful real-time infrastructure at the edge — a single-threaded, addressable object per room with WebSocket hibernation and built-in SQLite storage solves the hardest distributed-systems problem (room coordination) at the platform level; PartyKit's acquisition folded a friendly DX layer directly into Cloudflare. Extremely cheap for what it does."},{"rank":6,"product":"Replicache","domain":null,"score":3,"appearances":1,"modelRanks":{"Gemini":3},"reason":"Outstanding client-side sync engine for local-first web applications, delivering zero-latency optimistic UI updates and robust offline sync with any backend."},{"rank":7,"product":"Supabase Realtime","domain":"supabase.com","score":3,"appearances":1,"modelRanks":{"Grok":3},"reason":"Excellent Postgres-centric real-time (Broadcast, Presence, DB changes) for collaborative tools, chat, dashboards; seamless with Supabase stack, low-latency, self-hostable, cost-effective for database-driven apps with built-in auth/row-level security."},{"rank":8,"product":"PartyKit","domain":"partykit.io","score":2,"appearances":2,"modelRanks":{"ChatGPT":5,"Gemini":5},"reason":"A highly productive programmable-room model for JavaScript teams, with simple WebSocket infrastructure, edge deployment, and strong compatibility with Yjs for multiplayer editors, whiteboards, and custom collaborative experiences."},{"rank":9,"product":"Firebase","domain":"firebase.google.com","score":2,"appearances":1,"modelRanks":{"Grok":4},"reason":"Long-proven, scalable managed real-time sync with strong presence/offline support, easy integration for many app types, robust Google-backed ecosystem suitable for mobile/web practitioners needing quick setup without deep CRDT expertise."}],"perModel":{"ChatGPT":[{"rank":1,"product":"Liveblocks","reason":"The strongest turnkey choice for most web teams: managed low-latency sync, presence, conflict-free storage, Yjs support, comments, notifications, offline recovery, polished React tooling, and a global edge network eliminate substantial backend work.","fix":"Usage-based pricing and platform dependence make it a poor fit for teams requiring full infrastructure control or predictable high-volume costs."},{"rank":2,"product":"Yjs","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.","fix":"It is a synchronization engine rather than a complete production service, so authentication, persistence, scaling, monitoring, and abuse controls remain your responsibility."},{"rank":3,"product":"Ably","reason":"Exceptionally proven global realtime transport with strong reliability guarantees, broad SDK coverage, and useful collaboration primitives through Spaces and LiveObjects; especially compelling when massive connection scale and operational assurance outweigh turnkey editing features.","fix":"Spaces emphasizes presence, cursors, locations, and locks, so sophisticated document collaboration still requires additional state and conflict-resolution design."},{"rank":4,"product":"Automerge","reason":"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.","fix":"Its document/history model and younger integration ecosystem demand more architectural work than Yjs or a managed platform, particularly for large centralized web applications."},{"rank":5,"product":"PartyKit","reason":"A highly productive programmable-room model for JavaScript teams, with simple WebSocket infrastructure, edge deployment, and strong compatibility with Yjs for multiplayer editors, whiteboards, and custom collaborative experiences.","fix":"It provides lower-level realtime building blocks rather than Liveblocks-style complete collaboration features, leaving persistence architecture, permissions, and product UI to the developer."}],"Claude":[{"rank":1,"product":"Yjs","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.","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."},{"rank":2,"product":"Liveblocks","reason":"The strongest full-stack commercial offering — presence, comments, notifications, AI copilot primitives, and Yjs-compatible storage as managed APIs with polished React/Tiptap integrations; a small team can ship Figma-style multiplayer features in days rather than months. Assumption shaping rank: the typical practitioner values time-to-ship over infrastructure control.","fix":"Proprietary hosted service with per-MAU pricing that climbs steeply at scale, and your collaboration data plane lives on their infrastructure — not for teams needing self-hosting or strict data residency."},{"rank":3,"product":"Cloudflare Durable Objects","reason":"The best primitive for stateful real-time infrastructure at the edge — a single-threaded, addressable object per room with WebSocket hibernation and built-in SQLite storage solves the hardest distributed-systems problem (room coordination) at the platform level; PartyKit's acquisition folded a friendly DX layer directly into Cloudflare. Extremely cheap for what it does.","fix":"Locks you to the Cloudflare Workers runtime and its constraints (CPU limits, no long-running native deps), and you still build the collaboration logic (CRDT/OT, presence) yourself on top."},{"rank":4,"product":"Automerge","reason":"The leading CRDT for local-first architecture — Rust core with WASM/JS/Swift bindings, automerge-repo giving batteries-included sync and storage, and Ink & Switch's research pedigree; the best choice when documents must live on-device with full history and sync opportunistically. Near-tie with Durable Objects: Automerge is more complete as a data layer, Durable Objects more broadly applicable as infrastructure.","fix":"Slower and more memory-hungry than Yjs on large documents, and its ecosystem of editor bindings and hosted tooling is much thinner — weak fit for text-editing-centric apps."},{"rank":5,"product":"Ably","reason":"The most dependable managed realtime messaging backbone — global edge network, exactly-once delivery guarantees, connection-state recovery, and 99.999% uptime SLA, now with Spaces and a Liveblocks-competing collaboration SDK; the right choice when reliability of the transport layer is the product requirement (trading, live sports, fleet tracking, multiplayer state).","fix":"It's pub/sub transport plus presence, not a document-sync solution — no conflict resolution or persistence model for collaborative editing, and usage-based pricing gets expensive at high message volumes."}],"Gemini":[{"rank":1,"product":"Yjs","reason":"Industry-standard open-source CRDT framework offering exceptional performance, zero vendor lock-in, and broad binding support for rich-text editors and canvases.","fix":"Requires self-hosting and scaling custom WebSocket relay infrastructure and document persistence layers."},{"rank":2,"product":"Liveblocks","reason":"Premier turnkey commercial platform providing managed multiplayer APIs for presence, state sync, comments, and Yjs integration with minimal setup effort.","fix":"Proprietary cloud lock-in with usage-based pricing that scales steeply for high-volume active user applications."},{"rank":3,"product":"Replicache","reason":"Outstanding client-side sync engine for local-first web applications, delivering zero-latency optimistic UI updates and robust offline sync with any backend.","fix":"Commercial licensing requirement and non-trivial backend developer effort to write custom push/pull mutation handlers."},{"rank":4,"product":"Automerge","reason":"Production-ready open-source JSON CRDT with a fast Rust core, immutable versioning, and excellent cross-platform support across web and native platforms.","fix":"Higher memory and bandwidth overhead on large documents compared to Yjs, alongside a smaller rich-text binding ecosystem."},{"rank":5,"product":"PartyKit","reason":"Exceptional real-time edge infrastructure that dramatically simplifies WebSocket routing and state orchestration for multiplayer applications.","fix":"Deeply tied to serverless edge runtimes, leaving storage and CRDT conflict resolution logic up to the developer."}],"Grok":[{"rank":1,"product":"Liveblocks","reason":"Mature managed infrastructure purpose-built for multiplayer/collaborative apps with strong Yjs integration for text editing, presence, cursors, comments, shared state (Storage + Yjs), excellent dev experience, scalability to millions, AI/agent support, and production-proven reliability reducing infra burden for typical web/JS teams.","fix":"SaaS pricing/dependency (not ideal for fully offline-first, self-hosted-only, or extreme cost-sensitive/large-scale custom needs)."},{"rank":2,"product":"Yjs","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.","fix":"Requires significant setup for backend/persistence/scaling (not plug-and-play for non-expert teams)."},{"rank":3,"product":"Supabase Realtime","reason":"Excellent Postgres-centric real-time (Broadcast, Presence, DB changes) for collaborative tools, chat, dashboards; seamless with Supabase stack, low-latency, self-hostable, cost-effective for database-driven apps with built-in auth/row-level security.","fix":"Less specialized for complex rich-text CRDT merging or arbitrary shared state vs dedicated CRDT solutions (better for structured data)."},{"rank":4,"product":"Firebase","reason":"Long-proven, scalable managed real-time sync with strong presence/offline support, easy integration for many app types, robust Google-backed ecosystem suitable for mobile/web practitioners needing quick setup without deep CRDT expertise.","fix":"Operational Transformation roots can be trickier for highly concurrent complex merges than modern CRDTs; vendor lock-in and pricing at scale."}]},"missedByModel":{"ChatGPT":[{"product":"Hocuspocus","reason":"excellent self-hosted Yjs server, particularly for collaborative editors, but adds operational responsibility and is less broadly turnkey than the top choices"},{"product":"Convex","reason":"superb reactive application backend, but not a specialized CRDT collaboration stack and needs extra machinery for rich concurrent editing"}],"Claude":[{"product":"ElectricSQL","reason":"elegant Postgres sync-engine approach to shared state, but its 2024 rewrite narrowed scope to read-path sync, leaving writes/merging to you — not yet a full collaboration answer"}],"Gemini":[{"product":"ShareDB","reason":"battle-tested OT engine for JSON, but lacks modern local-first CRDT capabilities"},{"product":"Microsoft Fluid Framework","reason":"powerful enterprise sync architecture, but burdened by steep setup complexity and lower community adoption"}],"Grok":[{"product":"Automerge","reason":"strong Git-like history/versioning but smaller ecosystem, larger bundle, less text-editing maturity than Yjs"}]}}