Midscene vs Stagehand
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
Describe UI tests in plain English and an AI model runs them by looking at the screen.
Open source · MIT
TypeScript, Python and Go SDK for letting AI control a web browser to act on and extract data from sites.
The short answer
Choose Midscene if you need…
- Teams writing end-to-end tests for web apps who want less selector maintenance
- Developers adding visual checks to existing Playwright or Puppeteer suites
- QA engineers testing mobile apps on Android or iOS devices via ADB or WebDriverAgent
- Testers who need to check canvas content or visual details like highlights and layout
Choose Stagehand if you need…
- Developers building browser agents that must work on sites they do not control
- Teams extracting structured data from web pages that lack an API
- Engineers who already know Playwright and want AI-assisted steps
- Projects needing TypeScript, Python or Go bindings of the same workflow
Side-by-side
| Midscene | Stagehand | |
|---|---|---|
| Type | Dev tool | Library |
| Price | Free and open source | Free and open source |
| Licence | MIT | MIT |
| GitHub stars | 15.5k | 25.9k |
| Setup difficulty | Intermediate | Intermediate |
| How you get it | Install with a package manager | Install with a package manager |
| Main language | TypeScript | TypeScript |
| Last code update | 4 days ago | 6 days ago |
What each one is
Midscene
Midscene is an open-source framework for end-to-end testing of web, mobile, and desktop apps. You write steps and expected results in natural language, and an AI vision model uses screenshots to click, type, scroll, and check what is visible, instead of relying on fixed selectors. It can run as YAML test cases through Midscene Test or inside existing Playwright or Puppeteer tests.
Stagehand
Stagehand is an SDK that lets code drive a real web browser using plain-language instructions alongside Playwright-style methods. You can ask it to observe elements, act on a page (such as clicking a button), or extract data into a schema you define. Sessions such as login cookies can persist between runs.
Best for
Midscene
- Teams writing end-to-end tests for web apps who want less selector maintenance
- Developers adding visual checks to existing Playwright or Puppeteer suites
- QA engineers testing mobile apps on Android or iOS devices via ADB or WebDriverAgent
- Testers who need to check canvas content or visual details like highlights and layout
Stagehand
- Developers building browser agents that must work on sites they do not control
- Teams extracting structured data from web pages that lack an API
- Engineers who already know Playwright and want AI-assisted steps
- Projects needing TypeScript, Python or Go bindings of the same workflow
Strengths
Midscene
- Uses screenshots rather than DOM selectors, so it can target icon-only buttons, canvas, and cross-origin iframes
- Works with the same API across web, Android, iOS, HarmonyOS, and desktop
- Integrates with existing Playwright and Puppeteer tests and produces interactive HTML reports
Stagehand
- Familiar Playwright-style API for developers already using it
- Returns schema-validated data from extract() calls
- Available in TypeScript, Python and Go with MIT license
Not ideal for
Midscene
- Teams that need fully deterministic, repeatable test runs, since results depend on an AI model's judgment and the model's cost and behavior
- Projects that cannot send screenshots to a hosted model provider, unless they set up a self-hosted model (the README mentions open-source options without detailing setup)
- Simple unit-level tests, which do not need a visual agent
Stagehand
- People who only need fixed scripted browser tests with no AI, since the README centers on model-driven steps
- Non-programmers, because the examples require writing code and an API key for a model provider
- Users without Chrome installed for local runs, since the README says local runs need it
Trade-offs
Midscene
- Requires configuring an AI model, and each run may incur model costs
- Results depend on the chosen model; the README's benchmark numbers come from specific runs and configurations
Stagehand
- Relies on a third-party model provider and its API key, so usage has external cost and data flow
- README is truncated, so full feature and configuration details could not be verified here
- Model-driven actions can behave differently across sites and runs
Getting started
Midscene
Clone the repository
git clone https://github.com/web-infra-dev/midsceneStagehand
Install TypeScript package
pnpm add @browserbasehq/stagehand 'zod@~4.4.3'Install Python package
pip install stagehandFrequently asked questions
What is the difference between Midscene and Stagehand?
Midscene: Describe UI tests in plain English and an AI model runs them by looking at the screen. Stagehand: TypeScript, Python and Go SDK for letting AI control a web browser to act on and extract data from sites. Midscene suits teams writing end-to-end tests for web apps who want less selector maintenance, while Stagehand suits developers building browser agents that must work on sites they do not control.
Are Midscene and Stagehand free?
Midscene: Free and open source. Stagehand: Free and open source.
Is Midscene or Stagehand more popular?
Stagehand has more GitHub stars (25.9k) than Midscene (15.5k). Popularity isn't the same as fit — check which one matches your use case above.
What are other alternatives to Midscene and Stagehand?
Other options people compare them with include Cua, Browser Harness, Browser Use, 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.