Browser Harness vs Browser Use
Which should you use? A side-by-side look at what each one does, who it suits, what it costs, how hard it is to set up, and where each falls short.
Open source · MIT
Lets Claude Code, Codex or Cursor control your own logged-in Chrome browser.
Open source · MIT
Open-source Python library that lets an AI agent control a web browser to complete tasks.
The short answer
Choose Browser Harness if you need…
- Developers who already use Claude Code, Codex or Cursor and want the agent to act in their own logged-in Chrome
- People automating personal tasks on sites where they are signed in, such as downloading their own content
- Users comfortable approving remote debugging access in their browser
- Anyone wanting an MCP-based connection via browser-harness-mcp
Choose Browser Use if you need…
- Python developers who want to prototype an AI agent that operates websites
- Teams automating repetitive multi-step web tasks such as lookups or form filling
- People who want to run the agent locally with their own LLM API key
- Users who need a cloud browser for environments without Chrome, such as Docker or CI
Side-by-side
| Browser Harness | Browser Use | |
|---|---|---|
| Type | Dev tool | Library |
| Price | Free and open source | Free and open source |
| Licence | MIT | MIT |
| GitHub stars | 18.8k | 120k |
| Setup difficulty | Beginner | Intermediate |
| How you get it | See the README | Install with a package manager |
| Main language | Python | Python |
| Last code update | 4 days ago | 4 days ago |
What each one is
Browser Harness
Browser Harness connects a coding agent such as Claude Code, Codex or Cursor to your real Chrome browser, so it can open pages, click, type, read and download while logged in as you. It talks to Chrome over the DevTools Protocol, and the agent writes any helper it is missing as it works. People use it for personal, logged-in browser tasks that an agent would otherwise be blocked from.
Browser Use
Browser Use is a Python library that connects a language model to a web browser so an AI agent can click, type, and navigate pages to finish a task you describe in plain language. You can run it locally with your choice of model, or use a cloud browser service from the same project. The README's example task is looking up a repository's star count, and a demo shows the agent booking a driving test.
Best for
Browser Harness
- Developers who already use Claude Code, Codex or Cursor and want the agent to act in their own logged-in Chrome
- People automating personal tasks on sites where they are signed in, such as downloading their own content
- Users comfortable approving remote debugging access in their browser
- Anyone wanting an MCP-based connection via browser-harness-mcp
Browser Use
- Python developers who want to prototype an AI agent that operates websites
- Teams automating repetitive multi-step web tasks such as lookups or form filling
- People who want to run the agent locally with their own LLM API key
- Users who need a cloud browser for environments without Chrome, such as Docker or CI
Strengths
Browser Harness
- Uses your existing Chrome session, so logins are already in place
- Setup is one prompt pasted into a coding agent, per the README
- MIT licensed and open source
Browser Use
- Works with a chosen LLM provider, and the README shows OpenAI as an example
- Same agent code runs locally or on a cloud browser with a single change
- MIT licensed and actively pushed
Not ideal for
Browser Harness
- Repeatable automated tests of your own app: the README points to Playwright for isolated CI tests in a clean browser
- Users who do not want an agent with access to their personal logins, since it drives the whole running browser
- Anyone needing many parallel browsers at scale: the README points to Browser Use Cloud for that
Browser Use
- Non-programmers who want a no-code tool; the README's main path is Python code or an agent prompt
- Projects needing fully deterministic scripts, since the agent's behavior depends on a language model
- Anyone unwilling to pay for cloud browsers or manage API keys for the hosted options
Trade-offs
Browser Harness
- Gives the agent access to the whole browser, so it suits trusted, personal use
- Benchmark results in the README were run by the project's maintainers on a cloud browser and show no clear winner over alternatives
- Setup depends on enabling remote debugging in chrome://inspect and approving access
Browser Use
- Depends on a paid or API-keyed language model and, for cloud features, a Browser Use API key
- Cloud browser pricing and hosted features are described by the vendor and sit outside the open-source code
- The README is truncated, so some details of setup and configuration are not confirmed here
Getting started
Browser Harness
Install or upgrade via the setup prompt
Paste the setup prompt from the README into Claude Code or CodexClone the repository
git clone https://github.com/browser-use/browser-harnessFrequently asked questions
What is the difference between Browser Harness and Browser Use?
Browser Harness: Lets Claude Code, Codex or Cursor control your own logged-in Chrome browser. Browser Use: Open-source Python library that lets an AI agent control a web browser to complete tasks. Browser Harness suits developers who already use claude code, codex or cursor and want the agent to act in their own logged-in chrome, while Browser Use suits python developers who want to prototype an ai agent that operates websites.
Are Browser Harness and Browser Use free?
Browser Harness: Free and open source. Browser Use: Free and open source.
Which is easier to set up, Browser Harness or Browser Use?
Browser Harness is easier to get started with (rated beginner); Browser Use is rated intermediate and usually needs more setup.
Is Browser Harness or Browser Use more popular?
Browser Use has more GitHub stars (120k) than Browser Harness (18.8k). Popularity isn't the same as fit — check which one matches your use case above.
What are other alternatives to Browser Harness and Browser Use?
Other options people compare them with include PinchTab, Midscene, Stagehand, CloakBrowser, Page Agent.
Keep comparing
Built from our catalogue entries for both products: open-source details come from each project's README (AI-assisted, refreshed weekly) and GitHub data; AI-tool details are editorial. Spotted something wrong? Let us know from either product's page.