Test the AI Voice Agents You Build on Synthflow
Built a no-code voice agent on Synthflow? TestMu AI dials it like a real caller, scoring conversations on 9 quality metrics and calls on 30+ telephony metrics, with a clear go-live verdict before launch.
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Test Every Synthflow Call Flow. One Platform.
Test What Your Synthflow Agent Says on the Call
A no-code Synthflow agent still has to hold up when a caller goes off-script. Simulate thousands of real phone conversations and score every turn on 9 quality metrics.
Catch Off-Script Hallucinations
Synthflow agents lean on LLM memory and can drift from the prompt. Score hallucination, bias, completeness, context awareness, and conversation flow so the agent never invents a price, policy, or open slot.
Scenarios From Your Own Scripts and Knowledge
Ingest your call scripts, FAQs, and property or service docs, or connect Confluence, Jira, and GitHub, then auto-generate the BANT screening, reschedule, and angry-caller edge cases your agent will meet.
Go-Live Assessment
Get a Green, Yellow, or Red production-readiness verdict with customizable 0-100% pass/fail thresholds before the agent picks up a real caller.
From the First Message to Production
Test Before Launch, Analyze Live Calls After
Run simulated calls before the agent goes live, then batch-analyze the real reception, booking, and lead-qualification recordings it handles in production, on the same metrics, so quality holds from your test number to full call volume.
Full Coverage for Synthflow Voice Agents
Score what the agent says across 9 quality metrics, and how the call sounds across 30+ flow, accuracy, audio, and speech-to-text metrics, the latency and barge-in issues that keep a caller on the line.
Caller Experience and Booking Outcomes
Track CSAT and detected sentiment, containment rate, early-hangup rate, and how often the agent warm-transfers to a human instead of completing the booking or qualifying the lead itself.
Go-Live Assessment by Confidence
Get a Green, Yellow, or Red verdict from four weighted dimensions, with confidence scaled to how many test calls you ran, before the agent goes live on your business line.
Inside Synthflow Voice Testing on TestMu AI
9 QUALITY METRICS
Score Conversations on 9 Quality Metrics
Your Synthflow agent is evaluated across thousands of call scenarios on the same nine metrics, scored on every multi-turn exchange, so it never invents an open slot or price when the caller goes off-script.
Try for free- Hallucination, bias, and completeness checks
- Context awareness across a full booking flow
- CSAT and tone, with 0-100% pass/fail thresholds
PRE & POST EVALUATION
Test Before Launch, Analyze Real Calls After
Pre-evaluation dials your agent and simulates live calls; post-evaluation batch-analyzes the real reception, booking, and outbound recordings it handles, so quality holds from test number to full call volume.
Try for free- Live inbound and outbound test calls
- Passive monitoring and outbound number pool
- Batch analysis of production call recordings
SCENARIO & VOICE CONFIGURATION
Configure Callers, Voices, and Noise
Shape each test to mirror a real phone line. Generate scenarios from your call scripts, pick a persona like a hurried patient or skeptical lead, add background noise, and control call flow down to response timing.
Try for free- Auto-generated scenarios and a caller persona library
- 15 background-noise presets, from a busy clinic to a car
- Masked numbers and call-flow controls
AUDIO, STT & ISSUE DETECTION
Catch Call Failures Automatically
Beyond pass and fail, the platform surfaces exactly why a call broke, from a hallucinated price to a mishandled barge-in, patchy audio, or a name the speech-to-text got wrong, with precise mismatch logging.
Start Testing Your Synthflow Agent- Pitch tracker, Voice Quality Index, and SNR
- Speech-to-text accuracy on names and dates
- Automated issue tags for latency and barge-in
Built on Universal Testing Foundations
Project & Environment Management
Keep separate test suites for each Synthflow agent and call flow, manage environments, and scope variables with bulk creation.
Test Profiles & Personas
Inject reusable caller data like lead names and appointment times, and use a pre-built or custom persona library for targeted scenarios.
Validation Criteria
Define custom, evidence-based pass/fail rules per scenario with High/Medium/Low confidence tracking.
Security & Infrastructure
Execute via HyperExecute with optional secure tunnels for firewall-restricted voice and telephony stacks.
Scheduling Engine
Re-run your call suite after every prompt or flow change using preset frequencies or custom cron expressions with IANA timezone support.
Go-Live Assessment
Get a Green, Yellow, or Red verdict from four weighted dimensions with AI-powered failure-pattern analysis.
Success Stories of TestMu AI (Formerly LambdaTest)
50%
reduction in test execution time
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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
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