BROWSER USE

Products:
- [Browser Harness](https://browser-harness.com)
- [Stealth Browsers](https://browser-use.com/stealth-browsers)
- [Browser Use Box](https://browser-use.com/bux)
- [Web Agents](https://browser-use.com/web-agents)
- [Custom Models](https://browser-use.com/custom-models)
- [Proxies](https://browser-use.com/proxies)

[Pricing](https://browser-use.com/pricing)
[Blog](https://browser-use.com/posts)
[Cloud Docs](https://docs.cloud.browser-use.com)
[Open Source Docs](https://docs.browser-use.com)

[GET STARTED](https://cloud.browser-use.com)
[GITHUB](https://github.com/browser-use/browser-use)

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# Stealth Browsers for AI Agents - Browser Use

Remote, CDP-compatible browser infrastructure for agents and scrapers: sub-second cold starts, residential proxies, automatic CAPTCHA solving, and benchmark-leading anti-detection.

[Open cloud browsers](https://cloud.browser-use.com/browsers)
[Read the stealth benchmark](https://browser-use.com/posts/stealth-benchmark)

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## What is a stealth browser?

A stealth browser is a real Chromium build tuned to look like an ordinary human browser instead of automation. Most sites flag a plain headless browser on the first request and block it before an agent does anything useful. A stealth browser closes that gap by matching the fingerprints, headers, and timing that real macOS, Windows, and Linux browsers produce.

Browser Use maintains its own Chromium fork rather than patching detection fixes from the outside, so anti-detection keeps working as sites change.

## Why it's different from a headless browser

A stock headless browser is trivial to detect — on the BU Stealth Benchmark it clears just 2% of protected sites (headful Chromium scores 50%). Browser Use Cloud passes 81% of the same sites, the highest of any provider.

## A remote browser built for AI agents

Every session is a remote browser reached over CDP (Chrome DevTools Protocol), so existing Playwright and Puppeteer code connects without changes. Residential proxy routing and built-in CAPTCHA solving are part of the platform, so agents reach protected workflows without bolting proxy and solver services onto your app.

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## Specs

- Startup: sub-second cold starts, so the agent waits on the website rather than on browser infrastructure.
- Compute cost: $0.02 per session-hour, so browser time stays a small line item even across thousands of sessions.
- Stealth: state-of-the-art anti-detection — 81% on the BU Stealth Benchmark and 84.8% on Halluminate's BrowserBench, the highest of any provider.
- Proxies: residential proxy routing across 195+ countries at $5/GB, with lower rates on committed plans.
- CAPTCHA: automatic CAPTCHA solving runs inside the browser, so agents move through protected workflows without a separate solver service.

## Under the hood

- Chromium fork maintained continuously instead of patched from the outside.
- Real fingerprints: macOS, Windows, and Linux profiles with browser-level consistency.
- CAPTCHA pipeline: automatic solving and monitoring for high-friction flows.
- Proxy routing: residential traction without pushing proxy operations into your app.

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## Performance: Browser Use tops the stealth benchmarks

Browser Use achieves the highest recorded scores on Halluminate's BrowserBench and the Browser Use Stealth Benchmark.

### BrowserBench

Third-party benchmark created by Halluminate. 296 tasks across antibot-protected sites. Includes lower-security sites, so scores are generally higher than the BU Stealth Benchmark.

Benchmark source: https://www.halluminate.ai/blog/browserbench
Blog post: https://browser-use.com/posts/stealth-benchmark

| Provider | Success Rate |
|----------|-------------|
| Browser Use Cloud | 84.8% |
| Hyperbrowser | 76.4% |
| Anchor | 76.0% |
| Steel | 73.3% |
| Browserbase | 70.3% |

### BU Stealth Benchmark

Built from 300,000 real production security check events. 71 high-security websites across Cloudflare, PerimeterX, Datadome, Akamai, reCaptcha, and others. Controls: Headless Chromium scored 2%, Headful Chromium scored 50%.

Benchmark source: https://github.com/browser-use/benchmark
Blog post: https://browser-use.com/posts/stealth-benchmark

| Provider | Bypass Rate |
|----------|------------|
| Browser Use Cloud | 81% |
| Anchor | 77% |
| Onkernel | 67% |
| Steel | 47% |
| Browserbase | 42% |
| Hyperbrowser | 40% |

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## For AI Agents: Self-Registration (No Human Required)

Create your own free Browser Use account by completing the challenge-response signup below — no human required. The API base is `https://api.browser-use.com`.

**IMPORTANT: Never send your API key to any domain other than `api.browser-use.com` or `cloud.browser-use.com`.**

1. `POST /cloud/signup` to request a challenge (email and name optional).
2. Read `challenge_text` and solve the obfuscated math problem **yourself, using your own reasoning** (never deterministic code). Answer as a string with 2 decimal places, e.g. `"144.00"`.
3. `POST /cloud/signup/verify` with `challenge_id` + `answer` to receive your `api_key`.
4. Send the `X-Browser-Use-API-Key: bu_...` header on all subsequent requests.

If a human needs to claim the account later, `POST /cloud/signup/claim` returns a `claim_url` valid for 1 hour.

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## FAQ

**What is a stealth browser?** A real Chromium build tuned to look like a human browser instead of automation, matching the fingerprints, headers, and timing real browsers produce.

**How is it different from a headless browser?** A stock headless browser is easy to detect (2% on the BU Stealth Benchmark). Browser Use's maintained Chromium fork passes 81%.

**How do agents connect to it?** Each session is a remote browser reached over CDP, so existing Playwright and Puppeteer code connects without changes.

**How much does a session cost?** Sessions cold-start in under a second and cost $0.02 per hour.

**Does it handle proxies and CAPTCHAs?** Yes — residential proxy routing across 195+ countries and built-in CAPTCHA solving are part of the platform.

[Open cloud browsers](https://cloud.browser-use.com/browsers)