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PartyKit

Platform for building and deploying realtime multiplayer servers on the edge

As of 29 August 2026, PartyKit is free to use. PartyKit lets developers write and deploy stateful realtime servers (WebSockets, multiplayer, AI agents) to a global edge network. Softwr lists it under Developer Tools. PartyKit is available on Web, API.

Overview

What PartyKit does

PartyKit is an open-source platform for building realtime, multiplayer, and collaborative applications. Developers write small stateful server programs that run on the edge, handling WebSocket connections, presence, and shared state. It integrates with libraries like Y.js, Automerge, Replicache, and tldraw, and can deploy alongside existing stacks on Cloudflare, Vercel, Netlify, and AWS.

What people use it for

  • Multiplayer collaborative apps
  • Realtime AI agent backends
  • Live cursors and presence
  • Collaborative whiteboards and documents

The honest half

Where it falls short

Concrete and checkable, so you can decide whether any of them matter to you. This is the half of a review a vendor will not write about PartyKit.

  • Documentation and FAQ material on the marketing site is sparse compared to larger realtime platforms.
  • Commercial free tier requires deploying to the user's own Cloudflare account, adding setup complexity.
  • Storage on the free Individual plan clears every 24 hours, limiting it to prototyping rather than persistent production data.
  • Smaller ecosystem and community than more established realtime infrastructure providers.

Cross-shopped

What people choose instead of PartyKit

Each pairing was judged by two reviewers asking whether a buyer would genuinely weigh the two against each other. The ones that failed were deleted rather than published.

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    PartyKit
    vs
    Temporal logo
    Temporal

    Temporal: Both provide backend infrastructure for stateful, long-running application logic, though Temporal targets workflows rather than realtime connections.

  • P
    PartyKit
    vs
    n8n logo
    n8n

    n8n: An alternative for teams building connected, event-driven backend logic, though n8n focuses on automation rather than realtime multiplayer.

Pricing

What PartyKit costs

Taken from the vendor's own pricing page. Prices move, so check before you buy.

Individual

Free

  • Up to 10 live projects
  • Deploy to the global edge platform
  • Storage clears every 24 hours

Commercial

Free

  • Unlimited projects
  • Custom domains
  • Runs on your own Cloudflare account; pay only Cloudflare usage

Capabilities

Features

  • Stateful edge servers

    Run small server programs close to users that hold in-memory state per room.

  • WebSocket-first API

    Native support for WebSocket connections alongside standard fetch and HTTP handling.

  • CRDT library compatibility

    Works with Y.js, Automerge, and Replicache for collaborative document sync.

  • Framework integrations

    Ready-made bindings for tldraw and TinyBase for whiteboard and local-first data use cases.

  • Global edge deployment

    Deploys servers to a distributed edge network for low-latency connections worldwide.

  • Custom domains

    Commercial plan supports mapping custom domains to deployed PartyKit servers.

Answered, with sources

Questions people ask

Each answer names the page it came from, so you can check it rather than take our word for it.

How much does PartyKit cost?

PartyKit is completely free. Both the Individual and Commercial plans have no upfront costs.

Source
What is PartyKit's Individual plan?

The Individual plan is free and includes deployment to a global edge platform, support for up to 10 live projects, and is suitable for small projects. Storage is cleared every 24 hours.

Source
What is PartyKit's Commercial plan?

The Commercial plan is free but requires deploying to your own Cloudflare account. It includes custom domains, unlimited projects, and you pay only your Cloudflare usage costs.

Source
Can I upgrade from Individual to Commercial plan?

Yes, both plans are free but offer different feature sets. The Commercial plan removes project restrictions but requires managing your own Cloudflare infrastructure.

Source
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Softwr does not host reviews and shows no star rating for PartyKit, because a rating we did not collect is not ours to publish. What is here is the pricing and platform detail from the vendor’s own pages, limitations we could state concretely, and alternatives a reviewer confirmed people weigh against it. Tell us if any of it is wrong.

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