Voice Experience

Meet your customers with empathy at every turn.

Emotionally-aware AI agents that understand tone, intent, and context. Fluidly handle accents, interruptions, and rapid turns of conversation across 99+ languages.

Personalized Voices
Tailored to match your brand
Dynamic Interrupts
Handles interruptions instantly
Ultra-low Latency
Sub-600ms voice response
0ms
Response Latency
0+
Languages Supported
0%
Resolution Rate
0+
Calls Handled
Emotion-Aware Calling

Strike the right tone, every time.

An AI voice that understands caller intent and meets it with contextually relevant responses — delivering resolution with empathy.

Active Call0:01
Customer

Sentiment Detection

Real-time analysis of caller emotions including frustration, urgency, and satisfaction.

Tone Matching

Dynamically adjusts speaking pace, pitch, and formality to match the caller.

Smart Escalation

Routes high-emotion calls to human agents with full context preserved.

Instant Recovery

Handles interruptions and mid-sentence corrections without losing context.

Multilingual Support

Speak to anyone, anywhere.

Natural tone and emotion across 99+ languages. Seamlessly switch languages mid-conversation with zero latency.

99+ Languages

From Hindi and Telugu to Spanish and Mandarin — native-quality speech.

Mid-Call Switching

Customers can switch languages during a call and the AI follows instantly.

Hindi
नमस्ते, मैं आपकी कैसे सहायता करूँ?
Telugu
నమస్కారం, నేను మీకు ఎలా సహాయం చేయగలను?
Tamil
வணக்கம், நான் உங்களுக்கு எப்படி உதவ முடியும்?
Spanish
¡Hola! ¿Cómo puedo ayudarle?
French
Bonjour, comment puis-je vous aider?
German
Hallo, wie kann ich Ihnen helfen?

Inter-Sentence Language Switching

Ultra-natural voices adapt mid-conversation.

Customer
నమస్కారం, నా ఆర్డర్ ఎప్పుడు వస్తుంది?
Live Analytics

Proven reliability in real-time.

Live metrics from our production voice engine.

Real-time Emotion Tracking

Monitor caller sentiment derived from live voice interactions. Spikes in urgency or frustration are flagged instantly, allowing you to identify process bottlenecks in your knowledge base.

We analyze vocal tones and chat semantics to map customer sentiment in real-time, allowing immediate escalation of frustrated customers.

Live Emotion Tracker

Understanding what customers say is basic; understanding how they feel is advanced. This graph visualizes live customer sentiment across ongoing interactions.

Positive
0%
Neutral
0%
Negative
0%

Sub-second Latency Distribution

Experience our ultra-low latency engine. This distribution tracks our 600ms response SLA, ensuring fluid, human-like voice conversations without awkward pauses.

Latency matters. This graph live-streams the system's processing speed, proving our claim of sub-600ms voice interactions and instant chat responses.

Live Response Latency

Tracking the actual time it takes for our AI to process, decide, and respond. Our architecture ensures human-like latency without awkward pauses.

Voice AI Response45 ms
WhatsApp Chat Response120 ms

Agent Autonomy & Behavior

Track the behavioral mix of your AI. See exactly how often agents resolve queries autonomously, seamlessly transfer to human operators, or ask clarifying questions.

This metric proves that our AI doesn't just talk—it completes business goals. It calculates the live success rate of recent interactions.

AI Behavior & Goal Completion

We measure success by outcomes, not just conversation length. This graph tracks the real-time goal completion rate across all active AI agents, proving high reliability.

100%
Goal Completion
45s
Avg Duration
How It Works

From first ring to resolution.

Every call follows an intelligent workflow designed to maximize first-contact resolution.

01

Answer & Identify

AI picks up instantly and pulls caller history from your CRM.

02

Listen & Understand

Detects intent, emotion, and urgency using advanced NLU.

03

Resolve & Act

Processes refunds, updates orders, schedules appointments.

04

Learn & Improve

Every interaction feeds back, continuously improving accuracy.

Full Duplex Audio

Interrupt gracefully. Just like a human.

CallSathi's voice engine supports true full-duplex communication. If a customer interrupts mid-sentence, the AI instantly stops, listens, and pivots the conversation naturally.

Continuous Listening

AI listens while speaking, detecting human voice activity instantly.

Context Preservation

Interruptions are added to the context window so no information is lost.

Zero-Latency Pivot

The AI recalculates its response and answers the new query immediately.

AI Agent
"So your flight is booked for tomorrow at 8 AM. I can also arrange a taxi to pick you up at—"
Customer
👤
"Wait, actually can we change that to the 10 AM flight?"
AI Agent
"No problem, let me stop right there. I'm checking the 10 AM flight for you now…"
Sub-600ms Latency Architecture

Zero lag. Total fluidity.

We've engineered every layer of the voice stack — from streaming STT to parallelized TTS — to achieve human-level conversational speed.

Voice Input
0ms
Speech-to-Text
12ms
LLM Inference
22ms
Text-to-Speech
16ms
Total Roundtrip
Time to First Byte (TTFB)
~600ms
RAG Pipeline — Live Demo

How we guarantee zero hallucinations

Watch the full retrieval → verification → answer pipeline in action. Every number is traced back to its source.

Customer asks
"What's the EMI for the Creta SX at 9.25% for 5 years?"
Zero Hallucination
Pipeline Execution
Intent Classified
math_emi → calculate_loan tool forced
KB Search
Hybrid BM25+Dense → 2 chunks matched
Tool Called
calculate_loan(IN, auto, ₹17.6L, 60mo, 9.25%)
Grounding Check
✓ All numbers from tool output
Knowledge Base
Creta Brochure
Price Sheet
Insurance Docs
Service Schedule
Multilingual Code-Mixing

Real businesses mix languages. So do we.

Experience how our AI effortlessly adapts to your customers' preferred speaking style. Tap any flag to hear the AI combine regional languages with English for a truly native, human-like conversation.

🇮🇳

Hinglish

Hindi × English · Real estate

Natural Voices
Segment 1

Hello sir, aapka 3BHK in Kokapet ready hai — would you like to book a site visit on Saturday?

Segment 2

Agar aap weekend par free hain, toh main abhi slot confirm kar deti hoon.

Logic-first AI · numbers never come from the LLM

One wrong EMI costs a deal. Ours never breaks.

Every monthly payment quoted by a CallSathi agent is computed by a deterministic, country-aware calculator — the exact same module powering this widget. The LLM is told to quote the result verbatim. If the maths is wrong, it's a bug, not a hallucination.

Country pack

Your loan

Drag the sliders — results update live

On-road price₹12,49,000

From dealership rate-sheet

Down payment20% (₹2,49,800)

0–60%

Tenure60 months · 5.0 years

12–96 months

Annual rate9.25%

2.5% – 15%

Monthly payment (EMI)

₹20,863

for 60 months

int.20%

Total interest

₹2,52,580

Total payable

₹12,51,780

Principal

₹9,99,200

Upfront fees

₹71,266

Processing fee₹9,992
GST on fees₹2,069
Registration₹1,500
Road tax₹49,960
Other fees₹6,245
Disclosure (India): The rate shown is the nominal annual reducing-balance rate. Annualised Rate of Interest may differ when processing fees and GST are amortised. Foreclosure or prepayment charges may apply per RBI guidelines and your loan agreement. Road tax, registration, and insurance are statutory and shown separately.
Computed deterministically · LLM cannot alter

Same car, eight countries — same engine, eight correct answers

Auto loan · 60 months · default country rate · 20% down

🇮🇳
IN
₹20,863
/ month
🇦🇪
AE
AED 1,725
/ month
🇸🇦
SA
SAR 2,209
/ month
🇺🇸
US
$554
/ month
🇬🇧
GB
£464
/ month
🇩🇪
DE
€495
/ month
🇦🇺
AU
A$729
/ month
🇳🇿
NZ
NZ$783
/ month
WHATSAPP AI AGENT

Your AI on WhatsApp, Always On

Deploy an intelligent AI agent on WhatsApp that handles customer inquiries, takes orders, schedules appointments, and resolves issues — all with the warmth of a human conversation. The same AI brain that powers your voice calls, now on your customers' favorite messaging app.

Tap to listen
WhatsApp Voice Call

MedCare Clinic

English AI Agent

00:00
HD Voice • End-to-end encrypted

Enterprise WhatsApp capabilities, out of the box

24/7 Instant Replies

AI responds within seconds to every customer message. Handles thousands of concurrent conversations without wait times.

Smart Context Memory

Remembers past conversations, customer preferences, and order history. Every interaction feels personal and informed.

Multi-Language Support

Seamlessly switches between languages within the same conversation. Supports Hindi, Telugu, Tamil, and 99+ languages.

Rich Media Responses

Sends images, documents, location pins, and interactive quick-reply buttons for a engaging chat experience.

Human Handoff

Seamlessly escalates complex queries to human agents with full conversation context preserved. Zero context loss.

Official WhatsApp API

Built on Meta Cloud API with verified business profile. End-to-end encrypted, GDPR compliant, enterprise-grade.

Works with any business — retail, healthcare, hospitality, finance, real estate, and more. Setup takes less than 10 minutes with our 1-click WhatsApp Business integration.

Get started with WhatsApp AI

See it in action

Watch how CALLSATHI processes intent, retrieves knowledge, calls calculation tools, and securely routes to human agents directly inside WhatsApp.

Apex Auto
CALLSATHI AI • Online
🔒 Messages are end-to-end encrypted

Hi! I want to buy the Creta SX.

10:00 AM✓✓

Hello! 👋 Great choice. How can I help you with the Creta SX today?

10:00 AM

What's the EMI at 9.25% for 5 years?

10:01 AM✓✓
Type a message
Backend Workflow

Real-time intelligence
behind every message

Pipeline Execution
Intent Classified
math_emi → calculate_loan tool forced
KB Search
BM25+Dense → Found Creta pricing
Tool Called
calculate_loan(IN, auto, ₹17.6L, 60mo, 9.25%)
Message Generated
✓ Formatting tool output into WhatsApp text
Knowledge Base
Creta Brochure
Price Sheet
Finance Rates
<2s
Average Response Time
10K+
Concurrent Conversations
97%
Resolution Rate
99+
Languages Supported
OMNICHANNEL AI

One AI Brain, Every Channel

Same intelligence, same warmth — whether your customer calls or texts. See the identical scenario handled seamlessly across both voice and WhatsApp.

Scenario: Healthcare Appointment Rescheduling
MedCare Clinic
CALLSATHI AI • Online
TODAY

I need to reschedule my appointment with Dr. Sharma

9:10 AM
Context-Aware

Of course! 📋 Your current booking: 👨‍⚕️ Dr. Sharma 📅 March 28th, 10:30 AM When would you prefer?

9:10 AM

क्या आप मुझे तीस मार्च दोपहर 2 बजे का टाइम दे सकते हैं?

9:11 AM
Seamless Switch

✅ अपॉइंटमेंट फिक्स हो गया! 👨‍⚕️ Dr. Sharma 📅 March 30th | 2:00 PM अपॉइंटमेंट से 24 घंटे पहले आपको रिमाइंडर भेज दिया जाएगा।

9:11 AM
<2s
Response Time
97%
Resolution Rate
4.9★
Satisfaction
99+
Languages
🔄CRM auto-syncs across channels
👤Unified customer profile
📊Single analytics dashboard
Deploy across all channels

Ready to scale your voice?

Join hundreds of businesses automating their inbound and outbound calls with CALLSATHI AI.

CALLSATHI