Test every voice agent call before a customer makes it.
Vocalyze dials your agent with simulated callers, scores each conversation against your rubric, and flags slow or failed turns — with the recording to prove it.
25 free credits every month · no card required
- 30+
- languages and locales
- Real calls
- over the phone network — no SDK
- Every turn
- timed, scored and recorded
vocalyze / suites / support-regression
run #79Scenario
change-request · v3
- Caller
- Impatient customer, speaks fast, interrupts the agent
- Goal
- Change an existing request without being transferred
- Language
- English (US) · neural voice
- Limits
- Max 4 min · hang up after 2 failed attempts
Caller behaviour
Pass criteria
4 checks · 100 pts
- Verifies identity before making changes30
- Completes the caller's goal40
- Escalates only when the caller asks20
- Every reply starts within 1.5s10
Platform
Simulate, evaluate and protect — in one loop.
Everything you'd check by hand on a test call, measured automatically on every call, in every language you support.
Simulate
Callers that behave like your customers
Personas that interrupt, change their mind, pause and push back — in 30+ languages and accents.
Evaluate
Every call scored against your rubric
Weighted checks for goal completion, identity, escalation and speed — each one backed by transcript evidence.
- Completed caller's goal40
- Verified identity first30
- No unnecessary transfer20
- Replies within 1.5s10
Reply time on every turn
See which turn was slow, not just the average.
Waits through filler
"One moment please…" isn't treated as the answer. Vocalyze waits for the real reply.
- agent One moment while I check…
- filler · waiting
- agent Found it — your change is done.
- caller speaks next ✓
Evidence for every verdict
Jump straight to the moment a check failed in the recording.
How it works
From phone number to regression suite in four steps.
- 1
Connect
Add the phone number your agent answers on. No SDK or code changes.
- 2
Describe
Write the callers, goals and pass criteria that matter to you.
- 3
Run
Vocalyze places the calls — on demand or on a nightly schedule.
- 4
Review
Scores, per-turn reply times, transcripts and recordings for every call.
support-regression · run #79 vs #78
1 regression| scenario | en-IN | hi-IN | es-MX | fr-FR |
|---|---|---|---|---|
| change-request | 0.9s | 1.1s | 0.8s | 1.0s |
| refund-request | 1.0s | 2.3s | 1.2s | 0.9s |
| angry-caller | 1.1s | 1.0s | 1.3s | 1.2s |
| wrong-number | 0.6s | 0.7s | 0.7s | 0.6s |
15 / 16
passed
1.0s
avg reply
nightly
schedule
Rerun the same suite after every prompt, model or vendor change and see what got worse — before customers do.
Built for production
One source of truth for agent quality.
Shared by the people who build, test and answer for your voice agents — with the safeguards production data needs.
Teams
Engineering
Regression-test every prompt, model and vendor change before it ships.
QA & support
Replace manual test calls with repeatable suites in every language.
Product & CX
See exactly where conversations fail and prove quality to customers.
Security
Workspace isolation
Every workspace's agents, calls and results stay private to that account.
Encrypted by default
Data is encrypted in transit and at rest, with recordings behind expiring access links.
Private AI data
Your calls and transcripts are used only to run your tests — never sold or shared.
Controlled access
Secure sign-in, owner-only data access and verified integrations on every request.
Pricing
Start free. Scale when you're ready.
Free
$0
25 credits / month
Pro
$99
per month
Scale
$399
per month
Know your agent works — before anyone calls it.
first test call · passed · 25 free credits