Compare · Agent sandboxes · verified 17 Oct 2026

Runloop vs E2B

Runloop sells Devboxes for software engineering agents with credential gateways; E2B sells general microVM sandboxes. Both leave the agent loop to you.

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

Neither product is ours. Rush is, and it gets one paragraph below. Every cell is from the vendor's own pages.

The short answer

Pick Runloop for credentials kept out of the sandbox and a VPC deploy. Pick E2B for a general sandbox SDK with published per-second rates and an open-source runtime.

Read this first

The useful distinction

Runloop: VM-isolated Devboxes for software engineering agents, with blueprints, snapshots, an MCP Hub, Agent Gateways that hide API keys, and a Remote Agents SDK.

E2B: Firecracker microVM sandboxes driven from an SDK. Your agent runs code there; the loop, the git steps and the pull request are your code. Rush itself runs on E2B.

Head to head

Buyer questions

QuestionRunloopE2B
What runsNone by default. The Remote Agents SDK connects Claude Code over a broker and OpenCode or Goose over ACP; you drive them.None built in. You bring the agent; E2B ships a prebuilt claude template and guides for Codex and OpenCode.
IsolationVirtual machine isolation per Devbox. Devboxes suspend and resume; snapshots save the disk.Firecracker microVMs with dedicated kernels. A paused sandbox keeps its filesystem and memory, with no automatic deletion.
Result and pull requestLeft to you. Code Mounts pull a repository or branch in; opening the pull request is your code.Left to you. E2B's Claude Code guide clones with your token, runs the agent and reads git diff; pushing and opening the pull request is your code.
MCPMCP Hub calls tools on any MCP server through one endpoint, with tool-level access control, and keeps server credentials out of the Devbox.An MCP gateway inside the sandbox reaches 200+ servers from Docker's catalog, or servers you run yourself.
TeamPro adds repo connections and a Slack support channel. No shared task view on the pages we read.An SDK for your own product. No shared task view or Slack and Linear surface on the pages we read.
Starting priceBasic free with $50 of credits; Pro $250 / month plus usageHobby $0 with a one-time $100 credit; Pro $150 / month plus usage
Where it taps outYou still write the agent loop. Suspend and resume and repo connections are listed under the $250 Pro plan. VPC deploy is Enterprise only.Sessions end at 1 hour on Hobby and 24 hours on Pro unless paused. Sandboxes reach the open internet by default. No result or pull request layer. Pro has a $150 monthly fee before usage.

Decision

When each side wins

Runloop wins when

  • You need model API keys and MCP tokens kept out of the sandbox: Agent Gateways proxy model calls and MCP Hub holds tool credentials.
  • You need the infrastructure in your own cloud account (Enterprise VPC deploy) and a SOC 2 claim.
  • You fine-tune or evaluate models against your own workload.

E2B wins when

  • You want raw SDK control over each sandbox, for an agent you wrote or for work that is not an agent at all.
  • You must self-host: the runtime is Apache-2.0, runs on one KVM host or ships as Terraform for AWS, GCP and Azure, and E2B also offers BYOC.
  • You want published per-second rates for CPU and RAM and up to 1,100 concurrent sandboxes on its top published tier.

Rush

Where Rush sits

Rush is what you would build on either: an API where Claude Code, Codex or OpenCode does the task and returns the pull request.

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 Runloop cheaper than E2B?

List prices, read off each vendor's pricing page on 17 October 2026. Runloop: Basic free with $50 of credits; Pro $250 / month plus usage. E2B: Hobby $0 with a one-time $100 credit; Pro $150 / month plus usage. The units differ, so price the job you run, not the plan.

Where does Rush fit next to Runloop and E2B?

Rush is what you would build on either: an API where Claude Code, Codex or OpenCode does the task and returns the pull request.

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] Runloop, “Runloop - Pricing”, retrieved 2026-10-17. https://www.runloop.ai/pricing
  2. [2] Runloop, “Runloop - Your AI Agent Accelerator”, retrieved 2026-10-17. https://www.runloop.ai/
  3. [3] Runloop, “Devbox Overview - Runloop AI Docs”, retrieved 2026-10-17. https://docs.runloop.ai/docs/devboxes/overview
  4. [4] Runloop, “Runloop Features - Runloop AI Docs”, retrieved 2026-10-17. https://docs.runloop.ai/docs/overview/runloop-features
  5. [5] Runloop, “MCP Hub - Runloop AI Docs”, retrieved 2026-10-17. https://docs.runloop.ai/docs/devboxes/mcp-hub
  6. [6] Runloop, “Remote Agents SDK - Runloop AI Docs”, retrieved 2026-10-17. https://docs.runloop.ai/docs/axons/sdk
  7. [7] E2B, “E2B Pricing”, retrieved 2026-10-17. https://e2b.dev/pricing
  8. [8] E2B, “E2B | The Enterprise AI Agent Cloud”, retrieved 2026-10-17. https://e2b.dev/
  9. [9] E2B, “Sandbox persistence”, retrieved 2026-10-17. https://docs.e2b.dev/sandbox/persistence
  10. [10] E2B, “Claude Code - E2B Docs”, retrieved 2026-10-17. https://docs.e2b.dev/agents/claude-code
  11. [11] E2B, “Coding Agents - E2B Docs”, retrieved 2026-10-17. https://docs.e2b.dev/use-cases/coding-agents
  12. [12] E2B, “Available servers - E2B Docs”, retrieved 2026-10-17. https://docs.e2b.dev/mcp-gateway/available-servers
  13. [13] E2B, “e2b-dev/infra (GitHub README)”, retrieved 2026-10-17. https://github.com/e2b-dev/infra
  14. [14] Rush, “Rush product requirements”, retrieved 2026-09-15. https://getrush.ai/cloud
  15. [15] Rush, “Rush pricing (live contract on getrush.ai)”, retrieved 2026-09-15. https://getrush.ai/pricing
  16. [16] Rush, “Isolation, plainly”, retrieved 2026-10-17. https://getrush.ai/docs/concepts/isolation
  17. [17] Rush, “Results and proof”, retrieved 2026-10-17. https://getrush.ai/docs/concepts/results-and-proof
  18. [18] Rush, “Usage and billing”, retrieved 2026-10-17. https://getrush.ai/docs/concepts/usage-and-billing
  19. [19] Rush, “Rush MCP server”, retrieved 2026-10-17. https://getrush.ai/docs/concepts/mcp-server
  20. [20] Rush, “Automations”, retrieved 2026-10-17. https://getrush.ai/docs/concepts/automations

Next

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

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