Local Page Testing on 3,000+ Real Browsers
Securely test websites and mobile apps, hosted on local or staging environments, with TestMu AI.
Automate Browser Flows from your
Terminal with Kane CLI
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."
Take Your Localhost to Every Real Browser
Localhost Testing
Test on Local and Staging Environments
Test local and staging builds on real browsers before they go live. Add one capability flag to your existing scripts and you're connected.
Get Started For Free
- Test locally hosted web apps on 3,000+ real browsers.
- Test local HTML files and folders without a web server.
- Test on real browsers and devices - no emulators, no simulators.
Network Security
Test Within Your Network Security Protocols
Keep unreleased work private. Once a tunnel is active, TestMu AI runs your tests in the cloud without bypassing your team's security setup.
Get Started For Free- Works with your existing proxies - remote, PAC, or multiple.
- Runs through firewalls and VPNs without extra configuration.
- All tunnel traffic encrypted end-to-end with SSL.
Access Control
Test at Scale Without Compromising Compliance
Let your whole team test locally without putting compliance at risk. IP whitelisting and audit logs keep access and visibility under your control.
Get Started For Free- Only your team's IPs can connect - everyone else is blocked.
- Monitor and log all tunnel activity across the org.
- Set permissions on who can run tunnels across your org.
Built for the Full Local Testing Lifecycle
One-Click Tunnel Activation
Start local testing instantly with one-click tunnel activation, no CLI required.
Multiple Tunnel Management
Run multiple tunnels simultaneously across different environments without interruption.
Advanced Tunnel Configurations
Configure proxies, custom ports, SSL certificates, and local directories.
Instant Log Sharing
Share tunnel logs instantly for faster debugging collaboration.
Clean, Intuitive Interface
Intuitive GUI simplifies tunnel management for testers and developers.
Flexible Authentication
Authenticate via Google, GitHub, SSO, or email — no separate credentials.
Tutorial on TestMu AI UnderPass Tunnel
AI-Agentic Quality Engineering
Agent-to-Agent Testing
Test AI agents such as chatbots, voice assistants and more.
More about Agent-to-Agent Testing
Autonomous Testing
Detailed agent analysis under test, from the perspective of a synthetic end-user.
Multi-Persona Simulation
Diverse user personas like International Caller, Digital Novice and more.
Risk Scoring & Regression
End to end regression testing for agent under test with insights.
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 Love TestMu AI (Formerly LambdaTest)
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 #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
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
Local page testing is the process of testing a locally hosted website, staged environment, or private web application on real browsers and devices before it goes live. It lets you catch cross-browser compatibility issues, layout bugs, and performance problems in your local environment without pushing changes to production.
You can test locally hosted pages on real browsers using TestMu AI's UnderPass tunnel. UnderPass creates a secure SSH-based connection between your local machine and TestMu AI's cloud, giving you access to 3,000+ browser and OS combinations for local page testing without any terminal commands.
With TestMu AI's UnderPass tunnel, your local environment is connected to the cloud, giving you access to real mobile browser combinations on Android and iOS. You can run live cross-browser tests on Chrome for Android, Safari for iOS, and more without any physical device setup.
Yes. UnderPass is built to work behind corporate firewalls, proxies, and private networks. The encrypted SSH tunnel connects your local environment to TestMu AI's cloud without exposing your internal network or requiring any firewall rule changes.
Yes. Testmu AI supports local environment automation testing using Selenium, Cypress, Playwright, Appium, and other frameworks. You can point your automation scripts at your localhost or staged environment via the UnderPass tunnel and run tests across real browsers and devices on the cloud.
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
