Cloudflare Computer
Cloudflare Computer is a preview agent filesystem that lives in a Durable Object. The README still says PREVIEW ONLY, APIs are unstable, and it is not suitable for production. Three backends ship in that README: a container with a FUSE mount and computerd, an isolate shell via just-bash in a Dynamic Worker, and isolate JavaScript in a fresh Dynamic Worker. Workspace state is SQLite inside the Durable Object. There is no Cloudflare Computer $0 SaaS row. You pay whatever Workers / Durable Objects / R2 / Containers your account already bills.
Compare E2B if you wanted a hosted sandbox with a public dollar table, and Kitesurf if you wanted Cloudflare's agent browser, not a filesystem.
Key Features
- SQLite workspace: The Durable Object is the source of truth. Restarting the Worker does not invent a new disk.
- Three backends: Container for real Linux userland. Isolate shell for cheap bash. Isolate JS for modules plus
node:fs/promises. - One exec entry:
workspace.runtime.exec(source, { backend }). Confirm the package README; the spec underdocs/is forward-looking. - Preview gate: Do not treat AI SDK tool names from launch blogs as a stable contract.
Use Cases
- Workers teams prototyping an agent disk next to Durable Objects.
- People comparing isolate vs container on the same Workspace.
- Production sandbox buyers: look at E2B until this README drops the preview banner.
Limitation: "No API bill" and "$0 Linux for indie hackers" are not first-party price rows. Workers usage still meters. The 10% container fallback figure is launch talk, not a measured SLA.
Pricing
No Computer SKU on 2026-08-17.
| Path | Price | Notes |
|---|---|---|
| @cloudflare/computer (MIT) | $0 software | Preview. 8,355 stars the day we checked. |
| Cloudflare account | Usage | Workers, Durable Objects, R2, Containers on your plan. Confirm Workers pricing. |
If a leftover blog still lists a $0.072 vCPU-hour Computer row, treat the missing product price page as the source.
Getting Started
- Read the preview warning on github.com/cloudflare/computer.
- Install
@cloudflare/computeronly in a throwaway Worker. - Construct a Workspace on a Durable Object and try isolate shell before you attach a container.
- Confirm E2B if you needed a production sandbox this week.
Frequently Asked Questions
Is it production-ready?
No. The README says preview only.
Is the GitHub repo the product?
Yes.
Same as Kitesurf?
No. Computer is a Durable Object filesystem. Kitesurf is a Workers browser.
Alternatives
Tips
- Quote MIT preview plus Workers usage, not a $0 computer.
- Do not paste "suitable for production" into a deck.
- Confirm the README banner before you depend on an API name.
Conclusion
Cloudflare Computer is an MIT preview filesystem on Durable Objects, not a free production VM. Start at the GitHub repo, then decide whether E2B already covers the sandbox you need.
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