The Reliability Layer for Voice Agents
Simulate real calls before you release. Trace and score every call after. Get alerted the moment something breaks.
Monitor Your First 100 Calls Free. No Credit Card Required.
Simulation
Find out what breaks before your callers do.
Tuner calls your agent with simulated callers built around your real call types, under the conditions your customers actually call from.
Simulate real voice interactions
Routine and pressure in one run
Routine callers validate the happy path; demanding callers test how the agent handles interruptions, confusion, and edge cases.
Reusable caller profiles
Define accent, verbosity, patience, and interruption style once. Update the profile and every test using it updates.
Environments as messy as reality
Test under real-world conditions
Add background noise, interruptions, silence, and other conditions that can throw a voice agent off.
Recreate the calls you actually get
Use real call patterns, customer behavior, and failure modes to make simulations representative of production.
Failures become regression tests
Save a scenario out of a run
Turn a failed interaction into a reusable test and run it whenever you need to.
Rerun after every fix
Change the prompt, rerun the scenario, and see whether the agent passes.
Gate the deploy
SOON
Run the full suite before every release and catch regressions before they reach production.
Observability
Debug a call without listening to it.
Turn every production call into structured data you can query and debug. Trace the conversation turn by turn across transcript, audio, tool calls, latency, and state changes.
Every call, ready to query
30+ pre-built evals
Catch common voice-agent failures — hallucinations, scope boundaries, escalation handling, and more. No setup required.
Custom evals
Describe the rule that matters to your business. It runs on every call from then on.
Dynamic evals
Score each call against the agent's actual runtime instructions and context, with different expectations for each customer, session, or task.
Trace every moment of silence
Stage-level breakdown per turn
See exactly where time is spent across EOU, STT, LLM, and TTS.
p50 and p90 side by side
See whether most calls are fine and a few are slow, or whether latency is a problem across the board.
Dead air and longest monologue
See how long the caller waited, and the longest stretch the agent spoke without yielding.
Monitoring
Define what good looks like. Get alerted when it breaks.
Set the criteria that matter to your agent in plain language. Tuner evaluates every call against them and alerts you when something starts to go wrong.
Monitor every signal
Evals and red flags
Monitor eval results and red flags across every call.
Extracted data
Track the things Tuner extracts from calls — intents, outcomes, entities, sentiment, and other structured data.
Voice metrics
Monitor latency, dead air, interruptions, talk time, and other voice-specific metrics.
Know the moment it breaks
Alert on any signal
Trigger alerts from evals, red flags, extracted data, voice metrics, or any metric Tuner computes.
Combine signals
Build conditions across multiple signals. Alert when hallucination is detected and sentiment drops below 3.
Catch single failures or patterns
Get notified about a single critical failure, or when a pattern starts to emerge — latency creeping up, red flags increasing, or successful resolutions dropping.
Diagnose
Simulate · Observe · Diagnose
Ask what's breaking. Tuner reads the failed calls, the stage timings, and the version history, and reports what changed.
Get started
Instrument it in an afternoon.
One import, one line. Calls land structured and scored as they finish.
Enterprise-grade from the start.
SOC2 Type II
In progress
HIPAA
In progress
GDPR
Compliant
FAQ
Frequently asked questions
Everything teams ask before they connect their first agent.
What is Tuner?
What is voice AI analytics?
What's the difference between analytics and observability?
When does Tuner make sense to use?
How long does setup take?
Which voice platforms does Tuner support?
Who is Tuner built for? Do I need to be an engineer to use it?
Does Tuner support alerts and monitoring?
Can I define my own evaluations and metrics?
How is Tuner priced?
Is my call data private and secure?
Score your first call today.
Start free. No demo call, no sales cycle — install the SDK and watch the first call land.
Free tier, no card · Builder at $39/mo