Development Tools · head to head
CodeSandbox vs PartyKit
CodeSandbox
Development Tools
Cloud platform for instant, isolated development sandboxes and code execution
- From
- Free
- Rated
- -
PartyKit
Development Tools
Platform for building and deploying realtime multiplayer servers on the edge
- From
- Free
- Rated
- -
The short version
- Each has a real cost: CodeSandbox detailed paid plan pricing was not published on the accessible pages, making cost comparison difficult.; PartyKit documentation and FAQ material on the marketing site is sparse compared to larger realtime platforms.
- They diverge on capability: CodeSandbox covers Instant sandboxes, PartyKit covers Stateful edge servers.
Where they differ
Only the attributes on which CodeSandbox and PartyKit actually diverge.
| Attribute | CodeSandbox | PartyKit |
|---|
Identical on both: starting price (Free), pricing model (freemium), free tier (Yes), platforms (web, api), user rating (Not yet rated), category (Development Tools).
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 CodeSandbox
- Instant sandboxes
- Programmatic sandbox API
- Secure isolated execution
- Browser-based editor
- CI/CD sandbox support
- Scalable VM infrastructure
Only in PartyKit
- Stateful edge servers
- WebSocket-first API
- CRDT library compatibility
- Framework integrations
- Global edge deployment
- Custom domains
What people use each for
The jobs each tool is most often brought in to do.
CodeSandbox
- Running AI agent-generated code safely in isolationnot PartyKit
- Prototyping and sharing web projects in-browsernot PartyKit
- Executing untrusted code for a code playground productnot PartyKit
- Using sandboxes as ephemeral CI/CD build environmentsnot PartyKit
PartyKit
- Multiplayer collaborative appsnot CodeSandbox
- Realtime AI agent backendsnot CodeSandbox
- Live cursors and presencenot CodeSandbox
- Collaborative whiteboards and documentsnot CodeSandbox
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
CodeSandbox
- Detailed paid plan pricing was not published on the accessible pages, making cost comparison difficult.
- Focus has shifted toward programmatic sandbox infrastructure, which may be less approachable for casual users just wanting a quick online editor.
- Public sandboxes are visible to others by default, which is not ideal for proprietary code.
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.
Pricing, plan by plan
CodeSandbox
Free- FreeFree
- Public sandboxes
- Basic sandbox usage
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
Which should you pick?
Choose CodeSandbox if
- You need instant sandboxes.
- You want to start without paying.
- You work on web, api.
- You also want programmatic sandbox api.
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.
Questions people ask
- Is CodeSandbox or PartyKit better?
- Neither clearly leads. CodeSandbox starts at Free and PartyKit at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, CodeSandbox or PartyKit?
- CodeSandbox starts at Free and PartyKit at Free.
- Does CodeSandbox or PartyKit run on more platforms?
- Both run on web, api, so platform support will not decide this one for you.
- Can I use CodeSandbox for free?
- Both have a free tier, so you can try either at no cost before committing.
- What is CodeSandbox best used for?
- CodeSandbox is most often used for running ai agent-generated code safely in isolation, prototyping and sharing web projects in-browser, executing untrusted code for a code playground product, using sandboxes as ephemeral ci/cd build environments. Of those, running ai agent-generated code safely in isolation and prototyping and sharing web projects in-browser are not what PartyKit is typically brought in for.
- What can CodeSandbox do that PartyKit cannot?
- CodeSandbox covers Instant sandboxes, Programmatic sandbox API, Secure isolated execution, Browser-based editor. PartyKit covers Stateful edge servers, WebSocket-first API, CRDT library compatibility, Framework integrations.
Related pages
More on CodeSandbox
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