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

LambdaTest is now
TestMu AI
Trusted by 2M+ 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."
Selenium Automation Testing Tool
Perform automated browser testing online & enhance your test automation coverage across 3000+ real desktop and mobile environments.
Get Started For FreeTest On LambdaTest 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.
Get Started For FreeSelenium Mobile Browser Automation
Automate your Selenium and Appium test scripts with Selenium testing tool and achieve faster go-to-market launch.
Get Started For FreeParallel 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.
Get Started For FreePerform Geolocation Testing With Selenium
Automate geolocation testing to test your website across 3000+ browsers from different locations across the globe.
Get Started For FreeAutomate Accessibility Testing Effortlessly
Ensure web accessibility and achieve compliance with automated tests using TestMu AI Accessibility Automation.
Features To Accelerate Cross Browser Testing
It's not just about infrastructure, you get a whole range of complimentary features that will make your online cross browser testing experience smoother and help you ship products faster.
Test Locally hosted pages
Local hosted web testing to help you test and save your website or app from after deployment bugs.
Enterprise-Grade Security
We are SOC2 Certified, GDPR Compliant, and CCPA Compliant platform.
Cost-Effective Pricing
Access the device and run any number of tests without breaking your budget.
AI-Agentic Quality Engineering
Test AI agents such as chatbots and voice assistants to ensure efficiency, relevancy, and performance.More about Agent-to-Agent Testing

Experience the Power of Unified Testing Cloud
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
Gartner’s Magic Quadrant 2025
Recognized in Gartner's Magic Quadrant 2025 as a Challenger for strong customer experience.
Forrester’s Autonomous Testing Platforms Q3 2025
Featured in Forrester's Autonomous Testing Platforms Landscape, Q3 2025 for innovation in AI-driven testing.
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
2.5M+
Tests
1.5B+
Enterprises
18K+
Countries
132
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
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