Compare · Agent sandboxes · verified 17 Oct 2026

Rush vs Cloudflare Sandbox

Cloudflare's own tutorial runs Claude Code in a sandbox and stops at a diff. Rush starts at the same place and ends at the pull request.

Facts checked 17 October 2026. Prices and limits move. Read the citations.

Start a TaskAll comparison pages
Vendor agentDevin · Cursor · Copilot · Julessame jobRushYour harness, isolated, one PR
Isolated sandbox rooms, one per run
The short answer

Pick Cloudflare Sandbox when you build on Workers and want sandboxes beside your app. Pick Rush when the agent should commit, open the pull request and leave a record.

Proof

A real Rush run

Console capture of a coding Task that opened a pull request. Not a mockup.

cloud.getrush.ai · run-af7b2434
Rush console reviewing a pull request

Read this first

The useful distinction

Cloudflare Sandbox: Linux microVM containers, or isolated Dynamic Workers, started from a Worker to run untrusted or agent-generated code. You build the agent loop.

A sandbox is a computer for an agent. You still write the agent loop, clone the repository, push the branch and decide when the work is done. Rush is the layer above: you send the task and get back the pull request, report or files.

Head to head

Buyer questions

QuestionRushCloudflare Sandbox
What runsClaude Code, Codex or OpenCode, the vendors' own CLIs, or a saved agent built on one.None built in. Cloudflare's docs show Claude Code, Codex and Devin running in a sandbox that belongs to one task.
IsolationOne E2B microVM per run with its own disk, memory, desktop and browser. It parks between turns and is removed on cancel or after 7 idle days.Each container is a Firecracker microVM with its own kernel and network. Largest instance is 4 vCPU, 12 GiB and 20 GB disk. The container must start before the first command.
Result and pull requestA run on a repository works on its own branch and opens the pull request; a run whose checks fail ends needs_review, not completed. Reports and files come back as artifacts.Left to you. Cloudflare's coding agent runner tutorial clones a repository, runs Claude Code and returns a diff, with the instruction not to commit.
MCPRush is an MCP server at api.prix.dev/mcp with 18 tools. A run also takes MCP servers by connection or inline.Cloudflare runs a managed remote Container MCP server that spins up a sandbox development environment.
TeamEveryone in the org sees the same Projects and runs, with who started each. Automations start runs from GitHub events, schedules, webhooks and Linear.The Cloudflare account and Workers model. No sandbox-specific sharing on the pages we read.
Starting priceFree 5 agent-hours / month; Pro $20; Team $200Workers Paid $5 / month, with 375 vCPU-minutes and 25 GiB-hours included
Where it taps outThree harnesses. Repositories through the GitHub App only. No self-host or customer VPC. A key runs 4 at once by default, up to 100.Needs Workers Paid and a Worker and Durable Object around each sandbox. Largest instance is 4 vCPU and 12 GiB. The tutorial ends at a diff, with no pull request or proof.

Decision

When each side wins

Rush wins when

  • You want the commit, the pull request and its checks, not a diff.
  • You want the agent, its CLI version and its sign-in handled for you.
  • The run's transcript and artifacts come back on one record.

Cloudflare Sandbox wins when

  • You want very small instances (from 1/16 vCPU) billed per second, placed on Cloudflare's network.
  • You want Dynamic Workers isolates for cheap code execution.
  • Your app already lives on Workers, R2 and Durable Objects.

Rush

Where Rush sits

Cloudflare's coding agent runner returns a diff and tells the agent not to commit. A Rush run on a repository works on its own branch, opens the pull request, and is not completed until its checks pass.

Honest limits

Skip Rush if

  • Rush runs three agents: Claude Code, Codex and OpenCode. It does not host an agent you wrote yourself.
  • Repositories come through the Rush GitHub App. A GitLab or Bitbucket repository cannot be a run's repository yet.
  • There is no self-hosted or customer-VPC deployment, and we do not publish a compliance report today.
  • Compute is metered. Free includes 5 agent-hours a month and Pro 40, each with a weekly ceiling.
  • You review the pull request. Rush does not merge for you.

FAQ

Questions people actually ask

Is Cloudflare Sandbox generally available?

Cloudflare's pages retrieved 17 October 2026 say it is available on the Workers Paid plan. They do not carry a GA label, and one scheduling feature is marked public beta.

Can I move from Cloudflare Sandbox to Rush?

Yes. The steps, from Cloudflare's own docs, are on the Migrate from Cloudflare Sandbox to Rush page. Code you already pushed stays where it is.

Does Rush need my own model account?

By default a run uses your own Claude or ChatGPT subscription or API key, and your provider bills the model calls. Rush meters the sandbox compute against your plan, and parked time is free.

Cluster

Keep reading

Citations

Sources

Every factual claim on this page traces to one of these URLs. Retrieval date is 17 October 2026 unless the source prints an earlier published date.

  1. [1] Rush, “Rush product requirements”, retrieved 2026-09-15. https://getrush.ai/cloud
  2. [2] Rush, “Rush pricing (live contract on getrush.ai)”, retrieved 2026-09-15. https://getrush.ai/pricing
  3. [3] Rush, “Isolation, plainly”, retrieved 2026-10-17. https://getrush.ai/docs/concepts/isolation
  4. [4] Rush, “Results and proof”, retrieved 2026-10-17. https://getrush.ai/docs/concepts/results-and-proof
  5. [5] Rush, “Usage and billing”, retrieved 2026-10-17. https://getrush.ai/docs/concepts/usage-and-billing
  6. [6] Rush, “Rush MCP server”, retrieved 2026-10-17. https://getrush.ai/docs/concepts/mcp-server
  7. [7] Rush, “Automations”, retrieved 2026-10-17. https://getrush.ai/docs/concepts/automations
  8. [8] Cloudflare, “Sandboxes on Cloudflare”, retrieved 2026-10-17. https://developers.cloudflare.com/sandbox/
  9. [9] Cloudflare, “Choose a sandbox environment”, retrieved 2026-10-17. https://developers.cloudflare.com/sandbox/concepts/
  10. [10] Cloudflare, “Pricing (Containers)”, retrieved 2026-10-17. https://developers.cloudflare.com/containers/platform/pricing/
  11. [11] Cloudflare, “Limits (Containers)”, retrieved 2026-10-17. https://developers.cloudflare.com/containers/platform/limits/
  12. [12] Cloudflare, “Build a coding agent runner”, retrieved 2026-10-17. https://developers.cloudflare.com/sandbox/tutorials/claude-code/
  13. [13] Cloudflare, “Cloudflare's own MCP servers”, retrieved 2026-10-17. https://developers.cloudflare.com/agents/model-context-protocol/cloudflare/servers-for-cloudflare/

Next

Run the next Task on Rush

Connect a repository. Pick Claude Code, Codex, or OpenCode. Review the PR.

How the runtime works