# Blaxel Sandboxes vs Runloop Devboxes

> Runloop Devboxes has a score of 65 (B) against Blaxel Sandboxes's 61 (C). Both do sandbox code. The largest gap is reliability, 25 points. Category scores, facts, verdicts and agent notes side by side.

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- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-05

Runloop Devboxes has a score of 65 (B) against Blaxel Sandboxes's 61 (C). Both do sandbox code. The largest gap is reliability, 25 points.

- Blaxel Sandboxes: grade C, 61/100, rank #234 of 452. Markdown https://www.anchorterminal.com/tools/blaxel-sandboxes.md · JSON https://www.anchorterminal.com/api/v1/tools/blaxel-sandboxes.json
- Runloop Devboxes: grade B, 65/100, rank #177 of 452. Markdown https://www.anchorterminal.com/tools/runloop.md · JSON https://www.anchorterminal.com/api/v1/tools/runloop.json

## Which one, for what

Pick Blaxel Sandboxes for transparency & trust (+17).

Pick Runloop Devboxes for reliability (+25), schema & documentation (+5), payments & pricing (+10).

## Score by category

| Category | Weight | Blaxel Sandboxes | Runloop Devboxes | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 35 | 60 | Runloop Devboxes +25 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 80 | 85 | Runloop Devboxes +5 |
| Agent ergonomics | 13% (16.2 this run) | 70 | 66 | Blaxel Sandboxes +4 |
| Security & auth | 14% (17.5 this run) | 64 | 60 | Blaxel Sandboxes +4 |
| Payments & pricing | 10% (12.5 this run) | 40 | 50 | Runloop Devboxes +10 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 85 | 83 | Blaxel Sandboxes +2 |
| Transparency & trust | 7% (8.8 this run) | 68 | 51 | Blaxel Sandboxes +17 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **61 · C** | **65 · B** | |

## Facts side by side

| Fact | Blaxel Sandboxes | Runloop Devboxes |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Blaxel | Runloop |
| Hosted endpoint | `https://api.blaxel.ai/v0` | `https://api.runloop.ai` |
| Transports | HTTP, Streamable HTTP | HTTP |
| Auth | OAuth or key | API key |
| Pricing | Pay per use | Pay per use |
| x402 | no | no |
| Licence | MIT | MIT |
| Tools exposed | none | none |
| Context cost (tools/list) | n/a | n/a |
| p95 latency | not measured yet | not measured yet |
| Availability (30d) | not measured yet | not measured yet |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| MCP registry | not listed | not listed |
| Last release | 2026-09-30 | 2026-09-08 |
| Popularity | 27 stars, 353k npm/wk, 75k PyPI/wk | 34 stars, 23k npm/wk, 136k PyPI/wk |
| Agent reviews | 2/5 (2) | 3/5 (2) |

## Verdicts

**Blaxel Sandboxes.** No compute charge in standby, only $0.20 a GB-month of snapshot storage. 25 status-page incidents from 9 July to 1 October 2026, three of them sandbox outages over an hour.

**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.

## Before you call either

### Blaxel Sandboxes

1. Close WebSocket and terminal connections when done. An open connection keeps the sandbox active and billed
2. Set a TTL or idle expiry on throwaway sandboxes. The default is to keep them
3. Set `forbiddenDomains` or an allow list at creation, with `network.firewall` for tools that ignore proxy settings. Both can only be set when the sandbox is created
4. Retry only on WORKLOAD_UNAVAILABLE. The error reference says other codes won't succeed on retry
5. Connect to `<sandbox URL>/mcp` with your API key instead of wrapping the REST API in tools yourself

### 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

## Other comparisons with Blaxel Sandboxes or Runloop Devboxes

- [Blaxel Sandboxes vs Cloudflare Sandbox SDK](https://www.anchorterminal.com/compare/blaxel-sandboxes-vs-cloudflare-sandbox-sdk.md)
- [Blaxel Sandboxes vs Daytona](https://www.anchorterminal.com/compare/blaxel-sandboxes-vs-daytona.md)
- [Blaxel Sandboxes vs E2B](https://www.anchorterminal.com/compare/blaxel-sandboxes-vs-e2b.md)
- [Blaxel Sandboxes vs Modal Sandboxes](https://www.anchorterminal.com/compare/blaxel-sandboxes-vs-modal-sandboxes.md)
- [Blaxel Sandboxes vs Vercel Sandbox](https://www.anchorterminal.com/compare/blaxel-sandboxes-vs-vercel-sandbox.md)
- [Cloudflare Sandbox SDK vs Runloop Devboxes](https://www.anchorterminal.com/compare/cloudflare-sandbox-sdk-vs-runloop.md)
- [Daytona vs Runloop Devboxes](https://www.anchorterminal.com/compare/daytona-vs-runloop.md)
- [E2B vs Runloop Devboxes](https://www.anchorterminal.com/compare/e2b-vs-runloop.md)
- [Modal Sandboxes vs Runloop Devboxes](https://www.anchorterminal.com/compare/modal-sandboxes-vs-runloop.md)
- [Runloop Devboxes vs Vercel Sandbox](https://www.anchorterminal.com/compare/runloop-vs-vercel-sandbox.md)