Web Browser Online: Test on Any Browser
An online web browser is a real browser build hosted in the cloud and streamed to your tab, so any site can be tested without installing it. Test live on Chrome, Firefox, Safari, Edge and other web browsers online. Developers and QA teams can choose from 3000+ desktop and mobile browser and OS combinations.
Automate Mobile and Browser Flows
from your Terminal with Kane CLI
Trusted by 3M+ users globally at
"We have tripled our tests and are now executing tests in less than 2 hours with 78% Faster Test Execution"
"We figured out a more efficient way to monitor system health and resolve failures earlier in lower environments."
"TestMu AI has significantly boosted our testing speed, is easy to implement, and provides exceptional support."
"With 70% faster test execution, TestMu AI helped us achieve faster time-to-market and enhanced CX."
Test Across 3000+ Web Browsers
Test your website on real devices—like your phone, tablet, and computer—in real time. Select from 3000+ environments to easily test on desktop or mobile web browsers.
Get Started For Free
Test On Real Mobile & Desktop Web Browsers
Choose from a wide range of Windows PCs, Mac minis, iPhones, and Android smartphones with recent and legacy browsers. Access all these devices from anywhere in the world.
Get Started For Free
Live Responsive Testing Online
With LT Browser, you can perform responsive testing of your website across 50+ viewports. You can create infinite custom viewports and build, test, and debug a responsive website with this free-to-use tool.
Get Started For Free
Top 3 Features To Accelerate Web Browser Testing
Plugins & Extensions
Capture full-page screenshots and do cross-browser testing with the TestMu AI WordPress plugin and Chrome extension.
Geolocation Testing
To make sure your users get the best experience possible, test your mobile app or website from different geographic locations.
Test Locally Hosted Pages
Localhost web testing allows you to test your dev builds to work out bugs in your website before production launch.
Automated Screenshots on Online Web Browsers
With the TestMu AI automated screenshots tool on the cloud, you can perform web browser testing across 3000+ web browsers online. Choose the required configurations and time interval, and you are all set for automated periodic tests.
Get Started For Free
AI-Agentic Quality Engineering
Test AI agents such as chatbots and voice assistants to ensure efficiency, relevancy, and performance.More about Agent Testing
Experience the Power of Unified Testing Cloud
Success Stories of TestMu AI (Formerly LambdaTest)
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 LoveTestMu AI (formerly LambdaTest)
See how TestMu AI improves your testing with seamless integration, quicker results, and unmatched accuracy.
Users
3M+
Tests
1.5B+
Enterprises
18K+
Countries
132
TestMu AI Named a Challenger in the 2025 Gartner® Magic Quadrant™
Read ReportTestMu AI recognized in The Forrester Wave™: Autonomous Testing Platforms, Q4 2025
Read ReportWall of Fame
TestMu AI is the #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.
As Seen On
Some Love from our Customers
As Best Egg expanded its product offerings and entered new markets, we knew our old testing infrastructure couldn’t keep up.
With support from Tenny Agustin, our Engineering Operations Lead, we modernized our approach with
TestMu AI
Best Egg
best-egg
Excited to Share My Learning Journey with Kane AI & Lambda Tool!
I'm pleased to announce that I've recently gained hands-on experience exploring Kane AI through the Lambda Tool and it’s been a fantastic journey of upskilling!
KaneAI
Suryateja Goud
suryateja-goud
See how is #Futureready to enable blazing-fast test orchestration seamlessly integrated with organizations' existing CI/CD platforms, using #Microsoft Azure.
TestMu AI
Microsoft India
MicrosoftIndia
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