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Online Selenium Testing Tool

Reliable Automated Testing With Selenium Testing Tool Online Test On Cloud Grid Of 3000+ Browsers And Operating Systems.

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Trusted by 2M+ users globally at

Microsoft
OpenAI
Nvidia
Boomi

"We have tripled our tests and are now executing tests in less than 2 hours with 78% Faster Test Execution"

Hrishi Potdar , Quality Engineering Architect

Boomi
GitHub
Best Egg

"We figured out a more efficient way to monitor system health and resolve failures earlier in lower environments."

Tenny , Engineering Operations Lead

Best Egg
Workday
Akamai
Louis Vuitton
NBCUniversal
City Furniture

"TestMu AI has significantly boosted our testing speed, is easy to implement, and provides exceptional support."

Nicholas Paulsen , Senior Quality Engineer

City Furniture
Cox
Transavia

"With 70% faster test execution, TestMu AI helped us achieve faster time-to-market and enhanced CX."

Daniel de Bruijn , Quality Assurance Automation Engineer

Transavia
Estée Lauder
TripAdvisor
Bohoo

Pick Your Framework. We Handle the Rest.

Selenium

Selenium

Run tests across browsers in Java, Python, JS, and more.

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Playwright

Playwright

Cross-browser automation across Chromium, Firefox, and WebKit.

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Puppeteer

Puppeteer

Headless Chrome and Chromium automation via Node.js.

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Cypress

Cypress

End-to-end web app testing with real browser access.

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Appium

Appium

Automate native and hybrid apps on iOS and Android.

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Espresso

Espresso

Native Android UI tests with built-in synchronization.

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XCUITest

XCUITest

Native UI test automation for iOS and macOS apps.

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Jest

Jest

Write and run JavaScript tests with built-in mocking and coverage.

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Selenium Automation Testing Tool

Perform automated browser testing online & enhance your test automation coverage across 3000+ real desktop and mobile environments.

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Test On Real Device Cloud

Get instant access to real Desktop and Mobile devices. Say No to Emulators and Simulators! Find bugs earlier by testing your websites and web apps on a wide range of real Android and iOS devices. Ensure a seamless user experience and timely delivery on every release.

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Selenium Mobile Browser Automation

Automate your Selenium and Appium test scripts with Selenium testing tool and achieve faster go-to-market launch.

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Parallel Testing With Selenium Testing Tool

Leverage our cloud based testing tool for Selenium and trim down your test cycles by running Selenium test scripts in parallel.

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Perform Geolocation Testing With Selenium

Automate geolocation testing to test your website across 3000+ browsers from different locations across the globe.

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Browser Cloud - Scalable Browser Infrastructure for AI Agents

Give your AI agents a real browser to scrape, test, and automate at scale with stealth, session persistence, and geo-targeted proxies across 180+ locations.

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Success Stories of TestMu AI (Formerly LambdaTest)

Dashlane

50%

reduction in test execution time

“HyperExecute is a highly reliable test execution platform and has excellent customer support.”

Sagar Uday Kumar

Sr. Engineering Manager

More Reasons to Love TestMu AI (Formerly LambdaTest)

TestMu AI Named a Challenger in the 2025 Gartner® Magic Quadrant™

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TestMu AI recognized in The Forrester Wave™: Autonomous Testing Platforms, Q4 2025

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Wall of Fame

TestMu AI is #1 choice for SMBs and Enterprises across the globe.

Enterprise-Grade Security

We safeguard your data and AI systems with global security, privacy, responsible AI, and ESG standards.

Integrations

Works where you work, 120+ integrations with the tools your team relies on.

Users

3M+

Tests

1.5B+

Enterprises

18K+

Countries

132

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Frequently asked questions

TestMu AI forEnterprise

Get access to solutions built on Enterprise
grade security, privacy, & compliance

  • Advanced access controls
  • Advanced data retention rules
  • Advanced Local Testing
  • Premium Support options
  • Early access to beta features
  • Private Slack Channel
  • Unlimited Manual Accessibility DevTools Tests