Clutchbox vs Browserbase: getting AI agents signed in
Browserbase runs headless browsers for developers, whose code signs them in. Clutchbox syncs the sign-ins from your own Chrome into the browsers your agents use, whether your code runs them or we host them.
Side by side
| Question | Clutchbox | Browserbase |
|---|---|---|
| How sign-ins get in | An extension in your own Chrome syncs the sites you choose. Nobody types a password into another service or exports cookies by hand. | Your code, or a person in the live view, signs in once inside a cloud session and saves it to a Context. A cookie-sync skill can copy cookies, on request, from a local Chrome started in debugging mode. |
| Keeping them current | In the background: the extension syncs when a sign-in changes, and each browser gets your latest sync when it opens. | By hand: when a site signs out, sign in again or rerun cookie sync. |
| Environment | Any browser your code runs, with Playwright, browser-use, Stagehand or CDP, or our persistent Linux desktop with Chrome, live view and takeover. | Headless browsers in the cloud. Sessions last up to 6 hours, with an interactive live view. |
| How agents connect | Your code applies sign-ins with the open-source adapters, and hosted agents use a remote MCP server with OAuth: mouse and keyboard, Chrome over CDP, and shell commands. | CDP with Playwright, Puppeteer or Selenium, SDKs, Stagehand, and a hosted MCP server keyed by an API key, which can’t select a saved Context. |
| Claude and ChatGPT | A custom connector in Claude, a plugin in ChatGPT, and Claude Code and Codex. | No Claude connector or ChatGPT app is documented. |
| Free tier | Sync and 600 minutes of hosted computer time a month. Self-hosting is free. | 1 browser hour a month. Paid plans start at $20 a month. |
| Open source | All of it, under Apache-2.0: the extension, the sync format, the adapters and the web app. | The platform is closed source. Stagehand, its agent SDK, is MIT. |
| Bot detection and CAPTCHAs | Not offered. | CAPTCHA solving, proxies and verified fingerprints. |
Which should you use?
Choose Browserbase if you are building browser automation at scale, need CAPTCHA solving, proxies, regions or hundreds of concurrent sessions, and your own code handles sign-in.
Choose Clutchbox if you want your agents, or your users’ agents, to start signed in, kept current from the browser people already use, in your own browsers or from Claude and ChatGPT without writing code.
Clutchbox runs on your real accounts, so sync only the sites a task needs. How we keep your sign-ins safe.
Sources
Browserbase’s side is from its own documentation, read on October 24, 2026: Contexts, Authentication, Cookie sync, Long sessions, MCP setup, Pricing. Tell us at GitHub issues if something has changed.