LiveVoice AI uptime · latency & first-response monitoring

Test your voice agents before your customers do

Brook calls the numbers your voice AI answers, records the first response, and tracks uptime and latency — so you know the moment an agent stops picking up, before a customer does.

Start free
No SDK or code changes Free for your first month Live in 2 minutes
Brook · test call
live
Sales line
+1 (415) 555-0142 · Twilio · US-West
Dialing agent…
Recording call…
Capturing your agent's first response and timing it.
test 1 of 3
How it works

From phone number to live status in three steps

Brook calls your number on a schedule, around the clock, and turns every call into a simple up-or-down status you can act on.

  1. 1
    Step 01
    Add your number
    Point Brook at the phone number your voice agent answers. Any carrier — we only need the number, nothing else.
  2. 2
    Step 02
    We call it from time to time
    On your schedule, Brook dials your agent, records its first spoken response, and times exactly how long it took.
  3. 3
    Step 03
    Get the status of your agents
    Watch uptime, first-response latency, and what your agent said — and get alerted the moment it stops answering.
    100% uptime · last 24h
Brook dashboard showing Voice AI health — call success, response latency, answered calls, and incidents
Features

What Brook does today

Real calls to your live numbers, recorded responses, latency tracking, and instant alerts — here's what's working right now, and what's coming next.

Available now
Voice AI uptime
Know at a glance whether your agent is actually picking up the phone right now.
Public status pages
Share live uptime for your voice agents on a branded status page.
Scheduled monitoring
Run checks every 5, 15, 30, or 60 minutes, around the clock.
Notification alerts
Get alerted by email, Discord, Slack, or your own custom HTTP endpoint.
First-response time tracking
Measure how long your agent takes to give its first response on every call.
Call recording
We record your agent's first spoken response so you can hear exactly what a caller heard.
Coming soon
Soon
Real spoken call scenarios
We'll mimic real customers — background noise, choppy audio, irate callers — to find where your agent breaks.
Soon
Full transcripts
Read a complete transcript of everything said on every test call.
Soon
Speech latency tracking
Track customer-to-agent speech latency turn by turn, not just the first response.
Soon
Scenario evaluation
Make sure your agent greets and handles customers the way you want it to — define real scenarios and check each one.
Soon
Answer scoring
Score every spoken reply against the answer you expect, to catch wrong or off-policy responses.
The verdict

Three answers. Zero guessing.

Every test call resolves to one of three states — the same language as your dashboard's Operational, Degraded, and Down. No dashboards to decode, no log-diving. Just: is my agent good for customers right now?

Operational
Picked up fast and responded within your latency target. Customers are getting through.
Degraded
Still answering, but the first response is slow — above your latency target. Worth a look before it slips.
Down
No answer, dead air, or a timeout. The agent isn't picking up for customers right now.
Why it matters

When the line doesn't answer, customers don't wait

Brook doesn't lean on vanity metrics. Here's what independent research says happens the moment a phone agent goes slow, broken, or silent.

60%
of callers won't wait on hold longer than a minute before hanging up.
Talkdesk
65%
of customers switch to a competitor after a single bad experience.
Forrester
$3.7T
lost globally every year to poor customer experience.
Qualtrics XM Institute
5.9%
average call-abandonment rate — calls that never reach anyone.
Calabrio

Industry research on phone & customer-service experience — not Brook's own performance figures.

Pricing

Pay for the numbers you watch

Every tier places real test calls to your live numbers and tracks uptime, latency, and first response. Move up only when you add numbers, never to unlock the basics.

Free
For a single agent
$0/mo
no card required
  • 1 monitored number
  • 100 test calls / mo
  • Hourly checks
  • Email alerts
  • 7-day history
Start free
Most popular
Pro
For growing voice teams
$63/mo$79
billed annually
  • Everything in Free plus
  • 25 monitored numbers
  • 5,000 test calls / mo
  • Every 5 minutes
  • Slack, Discord & custom HTTP endpoints
  • Public status pages
  • 90-day retention policy
Start free trial
Enterprise
Scale
For agencies managing client numbers
Custom
volume-based · billed annually
Number tiers
1002505001,000+
  • Tiered by number volume, not per-seat
  • Volume test-call pricing
  • Multi-region dialing
  • SSO, SAML & audit logs
  • Custom test suites & SLAs
  • Dedicated support & onboarding
Included on every plan
  • Real test calls to your number
  • Uptime, latency & response status
  • Works with any carrier
  • No SDK or code changes
Start free

Hear what your customers hear

Add your first number and Brook places a real test call in minutes. No SDK, no credit card.

  • Free for your first month — your numbers, checks, and history stay saved when it ends
  • Live in 2 minutes — just add a number and we place your first test call
  • Email, Slack, Discord & custom HTTP alerts the moment something fails
Any carrier works — we just need the number, nothing else.
SOC 2 Type II in progress · call recordings encrypted at rest, delete anytime