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Test Local Websites With UnderPass
Perform localhost testing of your locally hosted website or web application across 3000+ browsers and device combinations.
LambdaTest is now
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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."
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Instant Tunnel Activation
Eliminate the need for launching tunnel through CLI. With UnderPass, automatically establish secure tunnels for testing locally-hosted pages in a single click on TestMu AI-native cloud.
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Multiple Tunnel Management
With our improved system infrastructure, users can effortlessly initiate and manage multiple tunnels at once, ensuring seamless testing across different environments without any interruptions.
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GitHub Actions With TestMu AI Tunnel For Local Testing
Utilize GitHub actions for TestMu AI Tunnel to streamline testing of locally hosted web pages. Upon triggering, it automatically sets up the binary and executes Selenium tests through the TestMu AI Tunnel.
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Local Environment Testing For Browser Compatibility
Seamlessly test local files across Windows, Android, and iOS browsers using Testmu AI platform for fast local browser testing, ensuring high-quality builds in your local settings.
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Accelerate Testing with TestMu AI UnderPass Tunnel
Select Connection Modes
UnderPass automatically selects the optimal connection mode for top testing speeds. It adjusts based on network conditions, ensuring the fastest transfers and an enhanced testing experience.
Easy Access To Local Directory
Easily adjust the local file path from the UnderPass app with a simple click, offering a more efficient and user-friendly experience.
Advanced Configurations
Unlock advanced tunneling with our system, offering tailored configurations for both basic and complex needs. Enjoy a flexible, optimized testing environment.
Streamlined Log Sharing
Enhance debugging efficiency with UnderPass new log copying feature. Quickly share and analyze logs, boosting collaboration and speeding up issue resolution.
Revamped User Interface
The revamped TestMu AI UnderPass Tunnel features a refreshed, intuitive design, delivering smoother navigation and more efficient tunneling operations.
Login-flexibility
Experience seamless, secure access with UnderPass Tunnel's expanded authentication options. Integrate with Google, GitHub, and SSO for added convenience.
Tutorial on TestMu AI UnderPass Tunnel
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
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50%
reduction in test execution time
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Sr. Engineering Manager
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Recognized in Gartner's Magic Quadrant 2025 as a Challenger for strong customer experience.
Featured in Forrester's Autonomous Testing Platforms Landscape, Q3 2025 for innovation in AI-driven testing.
Enterprise-Grade Security, Privacy, AI Governance & ESG
We protect your data and AI systems with global security, privacy, responsible AI, and ESG standards, backed by certifications.
Wall of Fame
TestMu AI is #1 choice for SMBs and Enterprises across the globe.
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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
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Best Egg
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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!
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See how is #Futureready to enable blazing-fast test orchestration seamlessly integrated with organizations' existing CI/CD platforms, using #Microsoft Azure.
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Microsoft India
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