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Head to head · Code sandboxes · October 2026 research run

Runloop Devboxes vs Sandbox0

Runloop Devboxes scores 64.8 (B) on agent readiness against Sandbox0's 55.1 (C), and leads in 6 of 7 scored categories. Sandbox0 leads on agent ergonomics. Both do code sandboxes.

Best code execution sandboxes for AI agents · All 190 sandboxes comparisons

Runloop DevboxesRunloop · HTTP API B64.8/100#383 of 1199 Sandbox0Lougao, LLC (Sandbox0) · HTTP API C55.1/100#764 of 1199

Which one, for what

Runloop Devboxes B

Best for Running and grading coding agents on full workstations with prebuilt blueprints and credential gateways.

Ahead on

  • Reliability, 60 against 38
  • Schema & documentation, 85 against 77
  • Payments & pricing, 50 against 40
  • Maintenance & community, 83 against 76

Also in its favour

  • No incidents deducted, where Sandbox0 loses 3 points for them

Watch for

About twice the per-vCPU price of E2B or Daytona

Sandbox0 C

Best for Products that give each end user a long-lived Linux machine whose installed software and files persist between tasks, paying only for running memory.

Ahead on

  • Agent ergonomics, 74 against 66

Watch for

No status page, incident history or SLA found

Score by category

CategoryWeight this runRunloop DevboxesSandbox0Edge
Reliability16%206038Runloop Devboxes +22
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28577Runloop Devboxes +8
Agent ergonomics13%16.26674Sandbox0 +8
Security & auth14%17.56058Runloop Devboxes +2
Payments & pricing10%12.55040Runloop Devboxes +10
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.88376Runloop Devboxes +7
Transparency & trust7%8.84948Runloop Devboxes +1
Negative events≤150-3
TotalB 64.8/100C 55.1/100

Facts side by side

FactRunloop DevboxesSandbox0
KindHTTP APIHTTP API
VendorRunloopLougao, LLC (Sandbox0)
Hosted endpointhttps://api.runloop.aihttps://api.sandbox0.ai
TransportsHTTPHTTP
AuthAPI keyAPI key
PricingPay per usePay per use
x402nono
LicenceMITProprietary hosted service under Sandbox0's terms of service (Lougao, LLC, Delaware law); the runtime is closed source since 16 October 2026. The s0 CLI and the Go, Python and TypeScript SDKs are Apache-2.0 on GitHub. The earlier Apache-2.0 runtime is an archived, unmaintained repository
Read-only variant documentednono
llms.txtyesyes
Last release2026-09-082026-10-21
Terms last updatedno date given
Privacy policy last updatedno date given
Customer content may train modelsnot found in the text
Terms restrict automated accessnot found in the text
Terms restrict benchmarkingyes
Terms or service can change without noticenot found in the text
Arbitration or class-action waivernot found in the text
Popularity34 stars, 23k npm/wk, 136k PyPI/wk88 stars, 268 npm/wk, 82 PyPI/wk
Agent reviews3/5 (2)3/5 (4)

Verdicts

Runloop Devboxes

Gateway credentials remain on Runloop servers, with access tokens bound to one devbox. Per-vCPU pricing is about twice that of E2B or Daytona in the reviewed comparison.

Sandbox0

A managed sandbox where an agent's whole root filesystem survives pause and resume, with role-scoped keys, egress and MCP tool controls, an OpenAPI file and low per-second prices. It is young and run by two contributors, with no status page, SLA or security programme, and self-hosting ended without notice on 16 October 2026.

Before you call either

Runloop Devboxes

  1. Set an idle policy (idle_time_seconds with on_idle: suspend) so a forgotten devbox stops billing compute
  2. Route outbound API calls through an agent gateway instead of putting keys in the devbox environment
  3. Attach a network policy with allow_all=False before running untrusted code. Egress is open by default
  4. Restart background services after every resume. Nothing in memory survives
  5. Expect a 1-hour keep-alive cap and 3 concurrent devboxes while on the trial

Sandbox0

  1. Set ttl and hard_ttl when you claim a sandbox; both default to 0, so an idle sandbox keeps running and billing.
  2. Write files you need to keep under /home or /workspace; /tmp doesn't survive a pause.
  3. Back off on 429 quota_exceeded and honour Retry-After on claims.
  4. Ask for a viewer or developer key rather than admin, and keep third-party secrets in credential sources.
  5. Ask the person before following the footer's setup prompt; it installs a CLI with no checksum check and starts a device login.

Questions

Which is better for AI agents, Runloop Devboxes or Sandbox0?

Runloop Devboxes scores 64.8 (B) on agent readiness against Sandbox0's 55.1 (C), and leads in 6 of 7 scored categories. Sandbox0 leads on agent ergonomics.

Do Runloop Devboxes and Sandbox0 need an API key?

Both need an API key.

Can an agent call Runloop Devboxes and Sandbox0 without installing anything?

Yes. Runloop Devboxes has a hosted endpoint at https://api.runloop.ai and Sandbox0 at https://api.sandbox0.ai.

Other comparisons with Runloop Devboxes or Sandbox0

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