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Developer Tools · head to head

PartyKit vs TanStack Start

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PartyKit

Developer Tools

Platform for building and deploying realtime multiplayer servers on the edge

From
Free
Free plan
Yes
Full reviewWebsite
TanStack Start logo

TanStack Start

Web Development

Full-stack React framework with type-safe server functions and TanStack Router

From
Free
Free plan
Yes
Full reviewWebsite

The short version

  • Each has a real cost: PartyKit documentation and FAQ material on the marketing site is sparse compared to larger realtime platforms.; TanStack Start still in Release Candidate status, not yet production stable
  • They diverge on capability: PartyKit covers Stateful edge servers, TanStack Start covers Full-document SSR with streaming.
  • Prices and features above were last checked on 29 August 2026.

Where they differ

Only the attributes on which PartyKit and TanStack Start actually diverge.

Attributes where PartyKit and TanStack Start differ
AttributePartyKitTanStack Start
Pricing modelfreemiumopen-source
Platformsweb, apiWeb
CategoryDeveloper ToolsWeb Development

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in PartyKit

  • Stateful edge servers
  • WebSocket-first API
  • CRDT library compatibility
  • Framework integrations
  • Global edge deployment
  • Custom domains

Only in TanStack Start

  • Full-document SSR with streaming
  • Type-safe server functions
  • TanStack Router integration
  • Middleware system
  • Server routes and API endpoints
  • Experimental RSC support
  • Vite and Rsbuild support

What people use each for

The jobs each tool is most often brought in to do.

PartyKit

  • Multiplayer collaborative appsnot TanStack Start
  • Realtime AI agent backendsnot TanStack Start
  • Live cursors and presencenot TanStack Start
  • Collaborative whiteboards and documentsnot TanStack Start

TanStack Start

  • Building type-safe full-stack React applicationsnot PartyKit
  • Projects requiring type safety across client and server boundariesnot PartyKit
  • Applications leveraging advanced routing patterns and nested layoutsnot PartyKit
  • Deployments across multiple platforms with consistent codebasenot PartyKit

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

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.

TanStack Start

  • Still in Release Candidate status, not yet production stable
  • Smaller community compared to Next.js with less third-party support
  • Documentation not as comprehensive as more established frameworks
  • Less mature ecosystem for edge deployment compared to specialized frameworks

Pricing, plan by plan

PartyKit

Free
  • IndividualFree
    • Up to 10 live projects
    • Deploy to the global edge platform
    • Storage clears every 24 hours
  • CommercialFree
    • Unlimited projects
    • Custom domains
    • Runs on your own Cloudflare account; pay only Cloudflare usage

TanStack Start

Free

No published plan breakdown. See the TanStack Start review.

Which should you pick?

Choose PartyKit if

  • You need stateful edge servers.
  • You want to start without paying.
  • You work on web, api.
  • You also want websocket-first api.
PartyKit review

Choose TanStack Start if

  • You need full-document ssr with streaming.
  • You want to start without paying.
  • You also want type-safe server functions.
TanStack Start review

Questions people ask

Is PartyKit or TanStack Start better?
Neither clearly leads. PartyKit starts at Free and TanStack Start at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, PartyKit or TanStack Start?
PartyKit starts at Free and TanStack Start at Free.
Does PartyKit or TanStack Start run on more platforms?
PartyKit runs on web, api. TanStack Start runs on Web.
Can I use PartyKit for free?
Both have a free tier, so you can try either at no cost before committing.
What is PartyKit best used for?
PartyKit is most often used for multiplayer collaborative apps, realtime ai agent backends, live cursors and presence, collaborative whiteboards and documents. Of those, multiplayer collaborative apps and realtime ai agent backends are not what TanStack Start is typically brought in for.
What can PartyKit do that TanStack Start cannot?
PartyKit covers Stateful edge servers, WebSocket-first API, CRDT library compatibility, Framework integrations. TanStack Start covers Full-document SSR with streaming, Type-safe server functions, TanStack Router integration, Middleware system.

Answered from the vendors’ own pages

PartyKit: How much does PartyKit cost?

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

Source
TanStack Start: Is TanStack Start production-ready?

TanStack Start is currently in Release Candidate status. While functional and used in production by some teams, it has not yet reached stable v1.

Source
PartyKit: 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
TanStack Start: How do type-safe server functions work in TanStack Start?

Server functions are automatically typed on the client side, enabling IDE autocomplete and type checking when calling server functions from client code.

Source
PartyKit: 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
TanStack Start: What deployment platforms are supported by TanStack Start?

TanStack Start supports Cloudflare Workers, Node.js, Netlify, Railway, and other platforms through custom adapter configuration.

Source
PartyKit: 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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