Voice AI · The voice channel

AI voice agents that sound human.

Every call answered on the first ring, in the caller's own language. Voice AI speaks 30+ languages, from Hindi and Spanish to Mandarin and Arabic, responds in under 700ms, and puts every conversation on the record.

30+Languages
<700msResponse
24·7Always on
Live call · Voice AI On air
Español detected · auto-switched
CallerHola, llamo por el sistema solar de 5 kW — ¿sigue disponible?
Voice AI¡Claro que sí! Sigue disponible. ¿Le agendo una visita técnica gratuita esta semana?
Answering in Español · +52 •• ••• 4821 · Mexico City · 1:07
642ms
Latency
Español
Detected
Qualified
Outcome

Voice AI powers step 02 of the GRX10 engine

01
Capture
Every lead becomes a record
02
Converse
AI agents talk to everyone
03
Close
Nothing goes cold
04
Retain
The record keeps working
The agent studio

Describe what you want the AI to do. In one sentence.

No prompt engineering. Say “collect EMI from overdue customers” and we generate the full system prompt, greeting, guardrails, and voice. Then it answers callers from Pune to Mexico City, each in their own language.

app.grx10 — Voice AI studio
1 Prompt
2 Voice
3 Tune
4 Launch
What should this agent do?
Call new solar enquiries within 90 seconds, confirm rooftop area and monthly bill, book a site survey, and answer subsidy questions.
Voice
Aria · warm female Kabir · calm male Sofía · es-MX Yuki · ja-JP + 30 voices
Languages
हिन्दीEnglishEspañol中文தமிழ்العربيةFrançais日本語+14
Recent calls · dummy data
+91 •• ••• 8042Pune, Indiaहिन्दीSurvey booked
+52 •• ••• 4821Mexico CityEspañolQualified
+971 • ••• 7315Dubai, UAEالعربيةCallback set
Your customer's language

Speaks 30+ languages and switches mid-call.

Hindi, Spanish, Mandarin, Arabic: Voice AI detects the caller's language, matches it, and code-switches the way real people do. No menus, no “press 1 for English”, anywhere in the world.

Englishहिन्दीEspañol中文العربيةFrançais日本語தமிழ்తెలుగుPortuguêsDeutschবাংলাमराठीಕನ್ನಡമലയാളംਪੰਜਾਬੀગુજરાતી+5 more
Sub-second

Fast enough to feel like a person.

Listen, understand, respond: the whole pipeline runs in under 700ms. No dead air, no robotic pauses. Natural enough that callers relax. The agent tells the truth when asked: it is AI, and it says so.

  • Barge-in handling: stops the instant a human starts talking
  • Prosody-aware: natural rhythm and emphasis in every language, not flat TTS
Speech-to-text142ms
Language model318ms
Text-to-speech182ms
Total round-trip642ms
Built for real calls

Everything a good phone agent needs.

Inbound & outbound

Answer every incoming call and place outbound campaigns: the same agent, both directions, in any market you sell in.

Warm human handoff

When a call needs a person, it transfers with full context, so the caller repeats nothing and the deal stays alive.

Logged & replayable

Every call transcribed, summarized, and written to the record with a disposition and recording. Nothing lives in someone's memory.

Two minutes

See Voice AI in action.

Getting started with Voice AI
The engine, end to end

Voice AI is how the engine talks.

Step 01 · Capture

MicroCRM

Every call writes back to the record: transcript, summary, disposition.

Explore MicroCRM
Step 03 · Close

Nudge

The orchestration engine decides when to call, when to message, and when to hand off.

Explore Nudge
Channel · Chat

WhatsApp AI

For customers who'd rather type, the same brain runs WhatsApp chats, voice notes and video notes.

Explore WhatsApp AI

Put a voice on every lead.

Run it for me

Hire the operators

Our VoiceOps team runs the calling for you: every lead reached, qualified, and logged.

Talk to us
I'll run it myself

Get Voice AI

Build agents and run your own calling in 30+ languages, from Hindi to Spanish to Mandarin. The first 100 minutes are free, no card required.

Start free See pricing

Tell us where revenue is leaking. We'll show you the fix.

See also
GRX10 vs Bolna →GRX10 vs Vapi →GRX10 vs Retell →Bolna alternatives →Technical whitepaper →Voice AI for India →