Liveblocks vs PartyKit vs Yjs (2026): Best Real-Time Collaboration Stack

"Multiplayer" isn't just for games anymore. Users expect real-time cursors, live editing, and presence indicators in every collaborative tool. Building these features from scratch takes months. Liveblocks, PartyKit, and Yjs each offer shortcuts — but at very different abstraction levels.

Liveblocks is a managed platform. PartyKit is a serverless runtime. Yjs is a CRDT library. Comparing them is like comparing Vercel, Express, and HTTP — they operate at different layers.

Quick Comparison

Feature	Liveblocks	PartyKit	Yjs
Type	Managed platform	Serverless runtime	CRDT library
Abstraction	High (SDK + API)	Medium (server + client)	Low (data structure)
Pricing	Free tier, then $25/mo+	Free tier (Cloudflare)	Free (MIT)
Self-host	No	Yes (Cloudflare Workers)	Yes (any server)
Best For	Product teams, fast shipping	Custom real-time apps	Full control, any stack

Liveblocks: The Managed Platform

Liveblocks is the "just works" option. Drop in their SDK and get presence, cursors, real-time storage, comments, and notifications without managing any infrastructure.

Strengths

• Feature-rich SDK: Presence, cursors, storage, comments, text editor plugins — all pre-built
• React hooks: useOthers(), useStorage(), useMutation() — clean, ergonomic API
• Editor integrations: First-class plugins for Tiptap, Lexical, Slate, Monaco, and CodeMirror
• DevTools: Browser extension for debugging real-time state
• Zero infrastructure: Fully managed. No WebSocket servers to deploy.

Weaknesses

• Vendor lock-in: No self-hosting option. Your data flows through Liveblocks' servers.
• Cost at scale: Pricing scales with monthly active users — can get expensive quickly.
• Limited customization: Pre-built features are great until you need something they don't support.
• Proprietary storage: Their storage model isn't standard CRDT — migration is non-trivial.

Pricing

• Free: 300 monthly active users
• Starter: $25/mo (up to 1,000 MAU)
• Pro: $100/mo (up to 10,000 MAU)
• Enterprise: Custom

PartyKit: The Serverless Runtime

PartyKit runs on Cloudflare Workers and gives you programmable, stateful WebSocket servers. Think "serverless functions, but with persistent connections and state."

Strengths

• Programmable servers: Write server-side logic for your real-time features. Full control.
• Cloudflare edge: Runs globally on Cloudflare's network. Low latency worldwide.
• Stateful: Each "party" (room) has persistent state via Durable Objects.
• Flexible: Build anything — games, collaborative editors, live dashboards, chat.
• Yjs integration: Built-in Yjs provider for CRDT-based collaboration.

Weaknesses

• More code required: You build the features Liveblocks gives you out of the box.
• Cloudflare dependency: Tied to Cloudflare Workers platform.
• Younger ecosystem: Fewer pre-built components and integrations.
• State limits: Durable Object storage has size constraints.

Pricing

• Free: Cloudflare Workers free tier
• Paid: Cloudflare Workers pricing ($5/mo + usage)
• Very affordable: Most apps cost $5-20/mo

Yjs: The CRDT Foundation

Yjs is a high-performance CRDT implementation. It's the data structure layer — you bring your own networking, UI, and persistence. Many real-time editors (including Tiptap's collaboration) are built on Yjs.

Strengths

• Maximum control: You own every layer. No vendor, no lock-in.
• Battle-tested CRDT: Used by millions of users through editor integrations.
• Provider ecosystem: WebSocket, WebRTC, IndexedDB, and more providers available.
• Offline support: CRDTs handle offline editing and conflict resolution natively.
• Framework agnostic: Works with React, Vue, Svelte, or any JavaScript framework.

Weaknesses

• Assembly required: You need to build presence, cursors, permissions, and UI from scratch.
• Server infrastructure: You run the WebSocket server (y-websocket or Hocuspocus).
• Learning curve: Understanding CRDTs, awareness protocol, and sync mechanisms takes time.
• No managed option: Everything is self-hosted.

Pricing

• Free: MIT license
• Hocuspocus (managed Yjs backend): Tiptap Cloud includes it
• Server costs: $5-50/mo depending on scale

Architecture Comparison

Liveblocks:   Client SDK → Liveblocks Cloud → Client SDK
PartyKit:     Client → Cloudflare Worker (your code) → Client
Yjs:          Client → Your WebSocket Server → Client

Liveblocks handles everything. PartyKit gives you a programmable server. Yjs gives you the data structure.

When to Choose Each

Choose Liveblocks If:

• You want collaboration features shipped this week, not this quarter
• Your app has <10K monthly active users (affordable tier)
• You need pre-built UI components (cursors, comments, presence)
• Vendor lock-in is acceptable for faster time-to-market
• You're adding collaboration to an existing editor (Tiptap, Lexical)

Choose PartyKit If:

• You need custom real-time logic (not just document editing)
• Building a game, live dashboard, or novel multiplayer experience
• You want low costs at scale (Cloudflare Workers pricing)
• Global low-latency is important
• You're comfortable writing server-side WebSocket code

Choose Yjs If:

• You need full control over your collaboration stack
• Offline-first with conflict resolution is a requirement
• You're building a product where collaboration is the core feature
• You have engineering resources to build and maintain infrastructure
• You need CRDT guarantees for data consistency

The Verdict

Ship fast: Liveblocks. No contest. Pre-built components, React hooks, and zero infrastructure get you to production fastest.

Build custom: PartyKit. When your real-time features don't fit Liveblocks' model, PartyKit gives you a programmable server at the edge for pennies.

Own everything: Yjs. When collaboration is your product's core differentiator, build on CRDTs and own the full stack. Higher investment, maximum flexibility.

Most teams should start with Liveblocks to validate the feature, then migrate to PartyKit or Yjs if costs or customization needs demand it.

FAQ

Can I use Yjs with Liveblocks or PartyKit?

Yes. PartyKit has built-in Yjs support. Liveblocks has its own storage model but also supports Yjs through their Text Editor plugins.

What about Socket.io?

Socket.io is a WebSocket library, not a collaboration framework. You'd use it as a transport layer underneath Yjs, not as an alternative to any of these three.

Do these work with React Server Components?

Real-time features are inherently client-side. Use 'use client' components for collaboration features. Server Components handle initial data loading.

Which is best for cursor presence (like Figma)?

Liveblocks has the best pre-built cursor components. PartyKit requires building cursor UI yourself. Yjs awareness protocol supports cursors but needs custom UI.