# AI Voice Agent

> Build production-grade voice agents with sub-500ms latency, multi-language support, and seamless telephony integration.

Source: https://edesy.in/docs/voice-agent

Build intelligent, production-ready voice agents that handle phone calls with human-like conversations.

> **Ready to build your voice agent?** [Start free on the Edesy Platform](https://voice-agent.edesy.in) - No credit card required. Create your first agent in minutes.

## What You Can Build

- **Customer Support Bots** - 24/7 automated support with human handoff
- **Order Status IVR** - Self-service order tracking
- **Appointment Booking** - Schedule and confirm appointments
- **Lead Qualification** - Qualify and route inbound leads
- **Outbound Sales** - Automated sales campaigns

## Key Features

| Feature | Description |
|---------|-------------|
| **Sub-500ms Latency** | Real-time conversations with minimal delay |
| **50+ Languages** | Hindi, Tamil, Spanish, and more |
| **Multiple Providers** | Twilio, Exotel, Plivo, Telnyx, WhatsApp |
| **Function Calling** | Integrate with your APIs and databases |
| **Native Audio** | Gemini Live for audio-to-audio processing |

## Quick Start

```json
{
  "agent": {
    "name": "My Voice Agent",
    "language": "en-US",
    "llmProvider": "gemini-2.5",
    "sttProvider": "deepgram",
    "ttsProvider": "cartesia",
    "greetingMessage": "Hello! How can I help you today?",
    "prompt": "You are a helpful customer support agent..."
  }
}
```

## Architecture Overview

```
Incoming Call → Telephony Provider → WebSocket
                                          ↓
                              ┌───────────────────┐
                              │   Voice Pipeline  │
                              │                   │
                              │  Audio → STT      │
                              │    ↓              │
                              │  Text → LLM      │
                              │    ↓              │
                              │  Response → TTS   │
                              │    ↓              │
                              │  Audio → Caller   │
                              └───────────────────┘
```

## Provider Options

### Speech-to-Text (STT)
- [Deepgram](https://edesy.in/docs/voice-agent/stt/deepgram) - Fastest, best for English
- [Google Chirp](https://edesy.in/docs/voice-agent/stt/google) - Best for Indian languages
- [Azure Speech](https://edesy.in/docs/voice-agent/stt/azure) - Enterprise reliability

### Text-to-Speech (TTS)
- [Cartesia](https://edesy.in/docs/voice-agent/tts/cartesia) - Ultra-low latency
- [ElevenLabs](https://edesy.in/docs/voice-agent/tts/elevenlabs) - Premium voice quality
- [Azure Neural](https://edesy.in/docs/voice-agent/tts/azure) - Best Indian language voices

### LLM
- [Gemini 2.5 Flash](https://edesy.in/docs/voice-agent/llm/gemini) - Fastest, lowest cost
- [Gemini Live](https://edesy.in/docs/voice-agent/llm/gemini-live) - Native audio processing
- [OpenAI GPT-4o](https://edesy.in/docs/voice-agent/llm/openai) - Best reasoning

### Telephony
- [Twilio](https://edesy.in/docs/voice-agent/telephony/twilio) - Global coverage
- [Exotel](https://edesy.in/docs/voice-agent/telephony/exotel) - India-focused
- [WhatsApp](https://edesy.in/docs/voice-agent/telephony/whatsapp) - WhatsApp Business Calling

## Documentation Sections

<div className="grid grid-cols-1 md:grid-cols-2 gap-4 mt-6">

### Getting Started
- [Introduction](https://edesy.in/docs/voice-agent/getting-started) - Overview and concepts
- [Quick Start](https://edesy.in/docs/voice-agent/getting-started/quick-start) - Build your first agent
- [Architecture](https://edesy.in/docs/voice-agent/getting-started/architecture) - System design
- [Configuration](https://edesy.in/docs/voice-agent/getting-started/configuration) - Setup options

### Core Features
- [Function Calling](https://edesy.in/docs/voice-agent/features/function-calling) - Tool integration
- [Call Transfer](https://edesy.in/docs/voice-agent/features/call-transfer) - Human handoff
- [DTMF Handling](https://edesy.in/docs/voice-agent/features/dtmf) - Keypad input
- [Webhooks](https://edesy.in/docs/voice-agent/features/webhooks) - Event notifications

### Services & Integrations
- [Trigger Outbound Calls](https://edesy.in/docs/voice-agent/api/trigger-call) - REST API and code samples
- [Voice Agent Audit](https://edesy.in/services/voice-agent-audit) - Independent audit of your voice agent (₹15K, credit-back)
- [Voice Agent Build Service](https://edesy.in/services/voice-agent-development) - We build voice agents on Vapi, Retell, Bolna, Bland, Synthflow, Voiceflow, or Edesy
- [CRM Integration Service](https://edesy.in/services/voice-agent-crm-integration) - Done-for-you CRM connectors (HubSpot, Salesforce, Zoho, GoHighLevel, Pipedrive)
- [Campaign Management](https://edesy.in/services/voice-agent-campaign-management) - Monthly retainer to run your voice campaigns end-to-end
- [WhatsApp + Voice Integration](https://edesy.in/services/voice-agent-whatsapp-integration) - Voice ↔ WhatsApp handoff service
- [Knowledge Base / RAG Setup](https://edesy.in/services/voice-agent-knowledge-base) - Production-grade RAG for FAQ voice agents

### Voice Agent by Industry
- [Healthcare](https://edesy.in/services/voice-agent-for-healthcare) - Clinics, hospitals, healthtech
- [BFSI](https://edesy.in/services/voice-agent-for-bfsi) - Banks, NBFCs, lending, insurance
- [Real Estate](https://edesy.in/services/voice-agent-for-real-estate) - Brokers, builders, PropTech
- [EdTech](https://edesy.in/services/voice-agent-for-edtech) - Coaching, schools, universities
- [E-commerce](https://edesy.in/services/voice-agent-for-ecommerce) - D2C, marketplaces, online stores

### Pipeline
- [VAD](https://edesy.in/docs/voice-agent/pipeline/vad) - Voice activity detection
- [Interruptions](https://edesy.in/docs/voice-agent/pipeline/interruptions) - Barge-in handling
- [Audio Processing](https://edesy.in/docs/voice-agent/pipeline/audio-processing) - Signal processing

### Languages
- [Multi-Language](https://edesy.in/docs/voice-agent/languages) - 50+ language support
- [Hindi](https://edesy.in/docs/voice-agent/languages/hindi) - Hindi configuration
- [Tamil](https://edesy.in/docs/voice-agent/languages/tamil) - Tamil configuration
- [Indian Languages](https://edesy.in/docs/voice-agent/languages/indian-languages) - All Indian languages

</div>

## Examples

| Example | Description |
|---------|-------------|
| [Customer Support](https://edesy.in/docs/voice-agent/examples/customer-support) | FAQ handling, tickets, human handoff |
| [Order Status](https://edesy.in/docs/voice-agent/examples/order-status) | Simple order tracking IVR |
| [Appointment Booking](https://edesy.in/docs/voice-agent/examples/appointment-booking) | Schedule and confirm appointments |
| [Lead Qualification](https://edesy.in/docs/voice-agent/examples/lead-qualification) | BANT-based lead scoring |
| [Outbound Sales](https://edesy.in/docs/voice-agent/examples/outbound-sales) | Sales campaign automation |

## Next Steps

→ [Quick Start Guide](https://edesy.in/docs/voice-agent/getting-started/quick-start) - Build your first voice agent in 5 minutes

---

## Start Building Today

Ready to create your AI voice agent? The Edesy Platform provides everything you need:

- **Visual Agent Builder** - Configure agents without code
- **Real-time Testing** - Test your agent directly from the browser
- **Analytics Dashboard** - Monitor call performance and latency
- **Contact Management** - Upload and manage contacts for campaigns

[**Launch the Platform →**](https://voice-agent.edesy.in)

Or [request a demo](https://edesy.in/demo) to see it in action.