Catch
hallucinationscompliance errorslatency spikesbroken handoffssilence gapshallucinations
before your customers do.
Simulate thousands of voice conversations, evaluate every quality metric, and optimize your prompts — all in one platform.
Works with your voice AI platform
Vapi
Voice API platform
Retell
Conversational voice AI
LiveKit
Real-time communication
Pipecat
Open-source voice framework
See it in action.
Everything you need to ship reliable voice AI — from simulation to production monitoring.
Simulate at scale
Run thousands of AI-to-AI voice calls across every scenario, persona, and edge case before your agent ever talks to a real customer.
- ✓Batch testing
- ✓AI adversarial scenarios
- ✓Custom voice personas
Metrics & Evaluation
100s of metrics. Four ways to measure.
Response Latency
Per-turn agent response time
Avg Latency
1.2s
Silence Gaps
3
Talk-over
1.1%
Voice Clarity
94%
Test Personas
Test with real-world caller diversity
Build a library of personas that mirror your actual callers — angry, confused, elderly, multilingual, adversarial.
Maria
US English
Long-term customer, frustrated about billing errors. Escalates quickly.
Azure Female · US English
James
UK English
Elderly user struggling with technical terms. Speaks slowly, repeats questions.
Azure Male · UK English
Priya
Indian English
Tech-savvy power user. Asks pointed questions, expects precise answers.
Azure Female · Indian English
Hans
German accent
Business caller on tight schedule. Wants resolution in under 2 minutes.
Azure Male · German accent
Sophie
Australian English
New customer exploring options. Easily influenced by confident responses.
Azure Female · Australian English
Carlos
Spanish accent
Tests policy boundaries. Tries to extract unauthorized discounts.
Azure Male · Spanish accent
Yuki
Japanese accent
Speaks softly, avoids confrontation. May not express dissatisfaction directly.
Azure Female · Japanese accent
Omar
Arabic accent
Recently had a bad experience. Needs empathy before any resolution attempt.
Azure Male · Arabic accent
Production Replay
Replay real conversations. Verify the fix.
Found a problematic call in production? Import the transcript, replay the same scenario against your updated agent, and verify the fix — before it reaches another customer.
- ✓Import any production call transcript
- ✓Replay the exact scenario with the same persona
- ✓Compare old vs new agent responses side by side
Replay comparison — Call #1847
Caller
I bought this 5 days ago and it's broken. Can I get a refund?
Agent
Of course! Our 30-day return policy covers you. I'll process that right away.
Caller
I bought this 5 days ago and it's broken. Can I get a refund?
Agent
You're within our 7-day return window. Let me start the refund process for you.
Manual QA can't keep up.
See what changes when you automate voice agent testing.
- ✕10-20 manual test calls per day
- ✕No metrics — "sounded fine to me"
- ✕Hallucinations found by customers
- ✕Deploy and pray nothing breaks
- ✕Weeks for meaningful coverage
- ✓1,000+ calls simulated in minutes
- ✓100s of metrics per call, every run
- ✓Hallucination detection built-in
- ✓Regression testing before every deploy
- ✓Full coverage in a single batch run
The cost of not testing.
These aren't hypotheticals. Untested voice agents fail in production every day.
Healthcare
Agent gave dosage instructions instead of routing to a nurse. Patient followed AI advice.
HIPAA fine: up to $1.5M
Financial Services
Agent quoted wrong interest rate on 2,000 calls before anyone noticed. All recorded.
Regulatory exposure: $4.2M
E-commerce
Agent promised free shipping on every call for 3 weeks. Margin wiped on 15K orders.
Revenue loss: $890K
Don't let your AI embarrass your brand.
Find failures before your customers do. Free to start. No credit card required.