#1 AI Video Agent Testing Platform
Put your video agents through real conversations with simulated people, real faces, and real voices. See how they respond before your users do.
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 Your Video Agent Beyond Text
A transcript captures your agent's words, but not how it responds to the person, handles interruptions, or performs during the video interaction.
Real Conversations
Handle interruptions, ambiguity, silence, and answers your agent did not expect.
Real People
Adapt to different personalities, behaviors, and conversation styles on camera.
Real-Time Interaction
Listen, respond, and keep the conversation moving without losing context.
On-Camera Experience
Get the voice, video, avatar, and interaction quality right, not just the words.
Video Agent Testing Beyond the Easy Conversations
Author scenarios, vary the conditions, score the on-camera experience, and prove every verdict with evidence.
BUILD SCENARIOS
Author Video Agent Scenarios
A scenario is the brief your simulated candidate improvises from.
- Define your agent's role once, then generate a set of scenarios.
- Write scenarios by hand for a specific bug.
- Bulk import your existing matrix as a CSV.
- Group them into a suite you run on every change.
WHAT YOU CAN TEST
Provoke the Hard Moments
Most agents handle a conversation that goes to plan. Weight your scenarios toward the awkward ones your users will create.
What can you put your agent through?
SCENARIO VARIATIONS
Vary Faces, Personas, and Data
One scenario tested once tells you only that it worked once.
- Avatar faces: same behavior no matter who it sees.
- Personas: blunt, chatty, distracted, or impatient.
- Test profiles: inject real names and reference data.
- Iterations: run up to 10 times to catch flakiness.
EVALUATION & EVIDENCE
Your Criteria. Your Definition of Pass.
Your video agent passes only if every criterion is met. Anything the evaluator cannot confirm from the recording does not count.
What you get back from every session
VIDEO AGENT QUALITY
Score the On-Camera Experience
Four pillars scored 0 to 10, or marked not evaluated.
- Conversation flow: turn-taking, pacing, interruptions.
- Question handling: listening, follow-ups, staying on task.
- Response quality: relevance and correctness of replies.
- Avatar presentation: lip-sync, motion, audio and video.
How It Works
Video Agent Testing, From Scenario to Verdict
Testing a video agent by hand does not scale. Someone has to join the session, play a role, sit through the whole conversation, and form an opinion. Do that ten times with ten personalities and you have lost a day. TestMu AI automates the loop end to end, in four steps.
- 01
Create your video agent
Add the joinable web URL, then describe the behavior and role your agent is supposed to have. No SDK, and no changes to your agent.
- 02
Build your scenarios
Generate them from your agent prompt, ground them in your own files and context, write your own, or bulk import a CSV.
- 03
Run the conversation
Choose the persona, avatar face, voice, and session length, anywhere from 30 to 600 seconds.
- 04
Get the verdict
Review the recording, turn-labeled transcript, criteria, and timestamped evidence behind every result.
Built for Video Agents That Have a Face
Any video agent a person could join in a browser with a camera and a microphone, you can test.
AI Interviewers
Test interviews across candidates, personalities, and the edge cases real hiring produces.
Onboarding Assistants
Test whether your agent guides users through onboarding without losing context.
Training Partners
Test difficult conversations, ambiguous responses, and repeated scenarios.
Virtual Front Desks
Test greetings, routing, clarification, and whether the task actually gets done.
Video Support Agents
Test real customer conversations before your customers have them for you.
Any Joinable Session
No SDK and no agent changes. We join from a web URL the way a person would.
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
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
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