Product · Simulation testing

Every failure mode, found before launch.

Run your agent against hundreds of simulated callers: realistic personas, native accents in 45 languages, peak-volume load and always-on health checks. Ship knowing exactly what passes.

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Start free with $50 in credit, no card needed. Works with Vapi, Retell, LiveKit, Pipecat + your stack.

Scoring production voice AI for teams at

radiantgraph

01 · Simulate before launch

Break it in staging,
not in production.

Run your agent against hundreds of simulated callers (realistic personas, accents, background noise and edge cases) and get every conversation scored before a customer ever dials in.

Scenarios & personas

Hundreds of simulated callers (the angry one, the rambler, the interrupter) built from your real call types.

45 languages & accents

Native accents, code-switching and background noise, in every market your agent answers.

Load & health tests

Peak-volume concurrency and always-on health checks, so the agent that passed in staging survives launch day.

Run it in CI

Every prompt or model change runs the suite before it merges: quality gates for conversations, not just code.

Pre-launch suite · booking_v2182 / 200 passed

Angry caller · refund demandpass · 92

Gulf Arabic · lobby noisepass · 88

Interrupts mid-disclosurefail · 61

Rambler · 3 intents in one turnpass · 85

Peak load · 250 concurrentpass

1 failure filed as an issue: fix it before launch, not after

Run your first suite

02 · Load & health

Survives launch day.
And every day after.

Passing in staging is not the same as holding at peak volume, and holding at launch is not the same as being up next Tuesday. Roark tests both, on a schedule.

Load testing

Ramp hundreds of concurrent simulated callers against your agent and watch latency, error rate and quality under pressure, so the peak-volume Monday your forecast promised is a rerun, not a surprise.

Load test · booking_v2ramp to 250 concurrent

Time-to-first-word · p95680ms

Turn latency · p951.4s

Dropped or errored calls0.2%

held at 250 concurrent for 20 minutes · passed

Health checks

Always-on probes call your agent around the clock and verify it answers, speaks and behaves. When one fails, your team hears it from Roark, not from a customer.

Health check · every 5 minuptime 99.98%

09:05Answered · first word in 1.1spass

09:10Answered · first word in 1.2spass

09:15No answer after 30sfail

Alert fired: #voice-alerts pinged in under a minute.

Built for 45 languages

The way the world actually calls.

Native accents, code-switching and local noise, not English with a filter. Every audio-native metric runs in each one.

45languages & dialects,
growing every release

Latin American SpanishGulf ArabicBrazilian PortugueseSouth Indian EnglishUK EnglishAustralian EnglishParisian FrenchMandarinCantoneseHigh GermanJapaneseTagalogHindi+ 32 more

03 · Get started

First suite running in minutes.

Pick scenarios, personas and metrics, point the plan at your agent's endpoint and launch it: from the dashboard, or a few lines of code.

Read the quickstart

simulate.ts

import Roark from '@roarkanalytics/sdk'
const client = new Roark({ bearerToken })
await client.simulationRunPlan.create({
  name: 'booking_v2 · pre-launch',
  direction: 'INBOUND',
  scenarios, personas, metrics,
  agentEndpoints: [{ id: agent.id }],
  maxSimulationDurationSeconds: 300,
  autoRun: true, // suite starts now
})