# Blaxel Sandboxes vs E2B

> E2B has a score of 68.5 (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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- Updated: 2026-10-05

E2B has a score of 68.5 (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
- E2B: grade B, 68.5/100, rank #122 of 452. Markdown https://www.anchorterminal.com/tools/e2b.md · JSON https://www.anchorterminal.com/api/v1/tools/e2b.json

## Which one, for what

Pick Blaxel Sandboxes for agent ergonomics (+5).

Pick E2B for reliability (+25), schema & documentation (+12), payments & pricing (+10).

## Score by category

| Category | Weight | Blaxel Sandboxes | E2B | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 35 | 60 | E2B +25 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 80 | 92 | E2B +12 |
| Agent ergonomics | 13% (16.2 this run) | 70 | 65 | Blaxel Sandboxes +5 |
| Security & auth | 14% (17.5 this run) | 64 | 62 | Blaxel Sandboxes +2 |
| Payments & pricing | 10% (12.5 this run) | 40 | 50 | E2B +10 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 85 | 88 | E2B +3 |
| Transparency & trust | 7% (8.8 this run) | 68 | 71 | E2B +3 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **61 · C** | **68.5 · B** | |

## Facts side by side

| Fact | Blaxel Sandboxes | E2B |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Blaxel | E2B |
| Hosted endpoint | `https://api.blaxel.ai/v0` | `https://api.e2b.app` |
| Transports | HTTP, Streamable HTTP | HTTP |
| Auth | OAuth or key | API key |
| Pricing | Pay per use | Freemium |
| x402 | no | no |
| Licence | MIT | Apache-2.0 |
| 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 | 2026-10-01 |
| Popularity | 27 stars, 353k npm/wk, 75k PyPI/wk | 13k stars, 2.2M npm/wk, 1.4M 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.

**E2B.** Firecracker microVM with its own kernel per sandbox. Two major incidents over an hour in September 2026, on sandbox creation and on creating from snapshots.

## 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

### E2B

1. Set a timeout when you create a sandbox. The default is 5 minutes
2. Pause rather than kill when you'll come back. Resume takes about a second and nothing is billed while paused
3. Use `Secret.fill` in network transforms instead of passing API keys into the sandbox environment
4. Pace sandbox creation. Hobby allows 1 a second and 20 running at once
5. Move to the v2 sandbox endpoints. SDK 2.51.0 and later use them by default

## Other comparisons with Blaxel Sandboxes or E2B

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