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Voice agents that finish the job on the call.

It answers every call, speaks your customers’ language, and books, looks up and updates in your systems while the caller is still on the line.

Book a demoFollow one call

Try saying

  • What can your voice agents do on a call?
  • Could one book into my Google Calendar?
  • How much does a phone call cost?

A real Zumu agent. Calls are recorded.

Inside one call

Callers never wait while it does the work.

It waits through a caller’s pause, stops the moment they cut in, and runs the lookup, the booking and the text while it keeps talking.

CallBrightline Heating & AirMaria Alvarez · 19:42:06

Example
  1. 0:01Toollookup_customer ✓Maria Alvarez · Comfort Plan
  2. 0:03Agent“Hi Maria. The furnace?”
  3. 0:05Maria“It won’t start… the Carrier, downstairs.”
  4. 0:10Turnpause · still her turn
  5. 0:14Turnend of turn
  6. 0:15Agent“Let me check your plan… parts are covered.”
  7. 0:29Toollookup_knowledge ✓Service agreement §4.1 · parts covered
  8. 0:33Maria“This week?”
  9. 0:37Turnend of turn
  10. 0:39Agent“Thursday morning —”
  11. 0:41Toolcheck_calendar ✓Thu 8–10 AM open
  12. 0:45Maria“After eight, though?”
  13. 0:45Turnbarge-in · it stops
  14. 0:50Turnend of turn
  15. 0:51Agent“8 to 10. Same address?”
  16. 0:59Maria“Yes, same address.”
  17. 1:02Turnend of turn
  18. 1:03Agent“One moment… booked. You’ll get a text.”
  19. 1:14Toolbook_visit ✓technician assigned
  20. 1:18Tooltext_confirmation ✓sent to her mobile
  21. 1:19Maria“Thanks!”
  22. 1:21Turnend of turn
  23. 1:22Agent“Anything else?”

BookedThursday 8–10 AM · confirmation sent

Books straight into Google Calendar, Microsoft 365 Calendar, Cal.com or Calendly

How Zumu hears the end of a turnSee all 100+ connectors and integrations

Studio

Rehearse every change before a customer hears it.

Change a greeting or a rule, run it against scripted calls with mocked tools, and publish once every test passes.

Release · Front desk

Live now: Release 14

Undo: Restore any earlier release

Trying: A shorter greeting on 20% of calls

Tested: 6 scripted test calls passed before release

Instructions: Drafted and checked by the AI prompt builder

PlaygroundFront desk

testingshorter greeting

  1. Brightline, front desk.
  2. Is a tune-up covered on the Comfort Plan?
  3. Search knowledgelookup_knowledgeService agreement §3.1 · two tune-ups a yearmocked
  4. It is, twice a year: heating in the fall, cooling in the spring. Shall I book the next one?
  • Opens with the shorter greeting
  • Answers from service agreement §3.1
  • Offers to book the tune-up

Test 3 of 6 · plan questionPassed

Agent settingsFront deskBrightline Heating & AirRelease 14 · live

It sounds like your business, in every caller’s language.

Voice

TessaCartesia

  • Also ElevenLabs, Fish Audio or your own cloned voice
  • Noise cancellation and speaker isolation on every call

Language

  • ENBrightline, front desk.
  • ESBrightline, recepción.
  • 10+ languages, detected from the caller’s first words

Pronunciation

  • Brightlinesaid “BRIGHT-line”
  • Nguyensaid “win”
  • SEER2said “seer two”

Hands off to

  • New installsSales agent, on the same call
  • After 8 PMAfter hours agent
  • BillingSam in accounts, briefed
How transfers work

Choose the voice your callers will know.

Describe the call your front desk takes most, and hear your agent answer it in the voice and language you pick.

Booked on the call · Thu 8–10 AM

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