# E2B vs Kernel: who uses which

On usedby, 25 companies use E2B and 17 use Kernel. 1 company uses both, including Anything. Counts include every proof level, job-post signals included; each company keeps its proof level on each side. Latest check 2026-10-25: 42 of 42 public lines checked.

## Side by side

|  | [E2B](https://www.usedby.ai/tools/e2b.md) | [Kernel](https://www.usedby.ai/tools/kernel.md) |
|---|---|---|
| Public customers | 25 | 17 |
| Confirmed | 12 | 8 |
| Observed | 13 | 9 |
| Signals (job posts) | 0 | 0 |
| Top industries of customers (every proof level) | Artificial Intelligence (16), DevTools & Infrastructure (3), Crypto & Web3 (1) | Artificial Intelligence (2), DevTools & Infrastructure (2), Fintech & Payments (1) |
| Category | Agent frameworks & AI gateways | Agent frameworks & AI gateways |
| Data processing terms | A data processing agreement is available. ([e2b.dev](https://e2b.dev/security), checked 2026-10-25) | — |
| Free trial | Free trial or free plan available. ([e2b.dev](https://e2b.dev/pricing), checked 2026-10-25) | — |
| Languages | Python, JavaScript ([e2b.dev](https://e2b.dev/), checked 2026-10-25) | — |

## Companies that use both

Every proof level counts; the proof level of each side is shown, strongest proofs first. The first public proof is not an adoption date.

| Company | Proof, E2B | Proof, Kernel | First public proof, E2B |
|---|---|---|---|
| [Anything](https://www.usedby.ai/companies/anything.md) | Observed | Confirmed | On or before October 2026 |

## Published results

Reviewed stories only; usedby did not measure the figures.

- E2B: [Replicas](https://www.usedby.ai/case-studies/replicas-e2b.md): **60%**: “More than 60% lower customer latency for heavy Replicas workloads after moving to E2B.” (published 2026-08-27)
- E2B: [Arena (LMArena)](https://www.usedby.ai/case-studies/arena-e2b.md): **600,000 sandboxes**: “Approximately 600,000 sandboxes per day.” (published 2026-10-01)
- Kernel: [Stably](https://www.usedby.ai/case-studies/stably-kernel.md): **333x**: “cutting browser cold starts by 333x” (published 2026-05-26)
- Kernel: [Flint](https://www.usedby.ai/case-studies/flint-kernel.md): **167x**: “167x faster cold starts” (published 2026-03-30)

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Source: https://www.usedby.ai/compare/e2b-vs-kernel · How we check: https://www.usedby.ai/methodology