# Browser sessions sandboxes

There are 3 browser sessions in the index.

3 sandbox providers. Also on the [web page](https://agentsandboxes.fyi/global/online/category/browser).

## Sandbox providers

1. [Browserbase](https://agentsandboxes.fyi/global/online/browserbase.md), Browser sessions, Online: Hosted headless-browser sessions for web agents, with the MIT-licensed Stagehand SDK.
2. [Kernel](https://agentsandboxes.fyi/global/online/kernel.md), Browser sessions, Online: Browser infrastructure for agents: headless and headful sessions, standby pools and per-second billing.
3. [Steel](https://agentsandboxes.fyi/global/online/steel.md), Browser sessions, Online: Apache-2.0 browser API for agents (steel-browser), with hosted sessions and stealth mode.

## Other categories in Online

- [Code execution](https://agentsandboxes.fyi/global/online/category/code-execution.md): 19 sandbox providers
- [Dev environments](https://agentsandboxes.fyi/global/online/category/dev-environments.md): 8 sandbox providers
- [Open source](https://agentsandboxes.fyi/global/online/category/open-source.md): 8 sandbox providers
- [Computer use](https://agentsandboxes.fyi/global/online/category/computer-use.md): 2 sandbox providers
- [Evals and RL](https://agentsandboxes.fyi/global/online/category/evals-rl.md): 2 sandbox providers

> **Check before you choose.** Vendor specs and prices change. Follow the cited source on each listing before you pick a provider.