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AI Voice Agent
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  • Trial Numbers
  • Purchasing Numbers
  • BYOP Setup
  • Exotel Setup
  • Telephony Providers Guide
  • Credits System
  • Provider Costs Breakdown
  • Usage Analytics
  • Credit Packs
  • Overview
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  • Common Issues
  • Audio Quality
  • Latency Optimization
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  • Overview
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  • Overview
  • Migrate from Vapi
  • Migrate from Retell AI
  • Migrate from Traditional IVR

Related Products

  • AI Voice Agent
  • AI Voice Assistant
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AI Voice Agent
  • Introduction
  • Quick Start
  • Architecture
  • Core Concepts
  • Configuration
  • Creating an Agent
  • Using Templates
  • System Prompt Configuration
  • Language Selection
  • Settings Reference
  • Overview
  • Upload Files (PDF, DOCX)
  • Web Crawling (URLs & Sitemaps)
  • Document Processing
  • RAG Integration
  • Troubleshooting
  • Creating a Campaign
  • CSV Upload & Variables
  • Scheduling & Retry Logic
  • Campaign Analytics
  • Contact Management
  • Uploading Contacts
  • Managing Contacts
  • Call History Enrichment
  • Trial Numbers
  • Purchasing Numbers
  • BYOP Setup
  • Exotel Setup
  • Telephony Providers Guide
  • Credits System
  • Provider Costs Breakdown
  • Usage Analytics
  • Credit Packs
  • Overview
  • Finding Your Workspace ID
  • Common Issues
  • Audio Quality
  • Latency Optimization
  • Error Codes
  • Overview
  • Twilio
  • Exotel
  • Plivo
  • Telnyx
  • WhatsApp
  • WebRTC Browser
  • Overview
  • Deepgram
  • Google Chirp
  • Azure Speech
  • ElevenLabs Scribe
  • AssemblyAI
  • OpenAI Whisper
  • Overview
  • Cartesia
  • ElevenLabs
  • Google TTS
  • Azure Neural
  • OpenAI TTS
  • Deepgram Aura
  • Sarvam Bulbul
  • HeyPixa Luna
  • Overview
  • OpenAI GPT-4o
  • Gemini 2.0/2.5 Flash
  • Gemini Live (Native Audio)
  • OpenAI Realtime
  • Anthropic Claude
  • Azure OpenAI
  • Overview
  • VAD (Voice Activity Detection)
  • Interruption Handling
  • Turn Detection
  • Audio Processing
  • Function Calling
  • Call Transfer
  • DTMF Handling
  • Call Recording
  • Exporting Recordings
  • Transcripts
  • Webhooks
  • Variables & Templates
  • Multi-Language Support
  • Hindi
  • Tamil
  • Assamese
  • Other Indian Languages
  • Latency Optimization
  • Scaling & Performance
  • Error Handling
  • Monitoring & Logging
  • Security Best Practices
  • Trigger Call via API
  • REST API
  • WebSocket Protocol
  • Webhooks
  • Webhook Subscriptions
  • SDKs
  • Overview
  • Financial Services
  • E-commerce
  • Logistics
  • Hyperlocal
  • Healthcare
  • Education
  • Overview
  • Customer Support
  • Sales & Lead Conversion
  • Marketing Campaigns
  • Debt Collection
  • Overview
  • Customer Support Bot
  • Order Status IVR
  • Appointment Booking
  • Lead Qualification
  • Outbound Sales
  • Recruitment Screening
  • Overview
  • Migrate from Vapi
  • Migrate from Retell AI
  • Migrate from Traditional IVR
  1. Docs
  2. AI Voice Agent
  3. Languages
  4. Tamil

Tamil Voice Agents

Build production Tamil voice agents with optimal provider configurations for Tamil Nadu and Sri Lanka markets.

Tamil Voice Agents

Tamil (ta-IN) is well-supported for voice agents, serving both Tamil Nadu in India and Tamil-speaking populations globally.

Quick Start

{
  "agent": {
    "name": "Tamil Support Agent",
    "language": "ta-IN",

    "llmProvider": "gemini-2.5",
    "llmModel": "gemini-2.5-flash-lite",

    "sttProvider": "deepgram",
    "sttModel": "nova-3",

    "ttsProvider": "azure",
    "ttsVoice": "ta-IN-PallaviNeural",

    "greetingMessage": "வணக்கம்! நான் உங்களுக்கு எப்படி உதவ முடியும்?",

    "prompt": "நீங்கள் ஒரு உதவியாளர். தமிழில் பதிலளிக்கவும்."
  }
}

Provider Options

STT (Speech-to-Text)

Provider Model WER Latency Cost/min
Deepgram nova-3 10-15% ~150ms ₹0.35
Google chirp_2 12-16% ~200ms ₹1.34
ElevenLabs scribe 14-18% ~180ms ₹0.56

Recommendation: Deepgram Nova-3 for best accuracy-cost balance.

TTS (Text-to-Speech)

Provider Voices Quality Cost/min
Azure 2 Neural Excellent ₹1.01
Google 2 Neural Good ₹1.34

Recommendation: Azure Neural voices for natural Tamil speech.

LLM

Provider Model Tamil Understanding Cost/min
Gemini 2.5 flash-lite Good ₹0.04
Gemini 2.0 flash Good ₹0.05

Recommendation: Gemini 2.5 for cost efficiency.

Azure Tamil Voices

Voice Gender Style Best For
ta-IN-PallaviNeural Female Professional, clear Customer support
ta-IN-ValluvarNeural Male Professional Business calls

Voice Configuration

{
  "ttsProvider": "azure",
  "ttsVoice": "ta-IN-PallaviNeural",
  "ttsConfig": {
    "speakingRate": 0.95,
    "pitch": "0%"
  }
}

Tanglish (Tamil-English Mix)

For agents handling code-switching:

{
  "agent": {
    "name": "Tanglish Agent",
    "language": "ta-IN",

    "prompt": "You can respond in Tanglish (Tamil-English mix) as commonly spoken. Example: 'Unga order ship aayiduchu, Friday-kulla delivery expect pannunga.'"
  }
}

Tanglish Examples

# Pure Tamil
"உங்கள் ஆர்டர் அனுப்பப்பட்டது"

# Tanglish (natural)
"Unga order ship aayiduchu"
"Delivery Friday-la varum"
"Payment successful-a complete aayiduchu"

Tamil Script Handling

Prompt in Tamil

{
  "prompt": "நீங்கள் ஒரு வாடிக்கையாளர் சேவை உதவியாளர்.\n\n## விதிகள்\n- பணிவாக இருங்கள்\n- தெளிவான பதில்களை வழங்குங்கள்\n- சிக்கல்களைத் தீர்க்கவும்"
}

Transliteration Support

{
  "prompt": "Users may type Tamil in Roman script (e.g., 'enaku order status venum'). Understand both Tamil script (தமிழ்) and Roman transliterations. Respond in Tamil script."
}

Formality in Tamil

Tamil has respectful forms using suffixes:

{
  "prompt": "## Formality Guidelines\n- Use 'நீங்கள்' (respectful you) not 'நீ'\n- Add respectful suffixes: 'ங்க' - as in 'சொல்லுங்க'\n- Use polite phrases: 'தயவுசெய்து', 'நன்றி'\n- Address as 'ஐயா' (sir) or 'அம்மா' (madam) when appropriate"
}

Formal vs Informal

Formal Informal
நீங்கள் எப்படி இருக்கிறீர்கள்? நீ எப்படி இருக்க?
சொல்லுங்க சொல்லு
வாருங்க வா
நன்றி தாங்க்ஸ்

Number Handling

{
  "prompt": "When speaking numbers in Tamil:\n- Use Tamil numerals or spoken words\n- ₹1,50,000 = 'ஒரு லட்சத்து ஐம்பதாயிரம் ரூபாய்'\n- Say phone numbers digit by digit with pauses"
}

Tamil Number Words

Number Tamil
1 ஒன்று
10 பத்து
100 நூறு
1,000 ஆயிரம்
1,00,000 லட்சம்
1,00,00,000 கோடி

Regional Considerations

Tamil Variants

Variant Region Notes
Standard Tamil Chennai Neutral, formal
Madurai Tamil Southern TN Different vocabulary
Sri Lankan Tamil Sri Lanka Distinct accent
Kongu Tamil Coimbatore Western TN

Time-based Greetings

func getTamilGreeting(hour int) string {
    switch {
    case hour < 12:
        return "காலை வணக்கம்" // Good morning
    case hour < 17:
        return "மதிய வணக்கம்" // Good afternoon
    default:
        return "மாலை வணக்கம்" // Good evening
    }
}

Complete Example

Customer Support Agent

{
  "agent": {
    "name": "Tamil Customer Support",
    "language": "ta-IN",

    "llmProvider": "gemini-2.5",
    "llmModel": "gemini-2.5-flash-lite",
    "llmTemperature": 0.7,

    "sttProvider": "deepgram",
    "sttModel": "nova-3",
    "sttConfig": {
      "language": "ta",
      "keywords": ["ஆர்டர்:2", "டெலிவரி:2", "ரிஃபண்ட்:2"]
    },

    "ttsProvider": "azure",
    "ttsVoice": "ta-IN-PallaviNeural",

    "greetingMessage": "வணக்கம்! நான் உங்கள் சேவைக்கு தயாராக இருக்கிறேன். உங்கள் ஆர்டர் பற்றி அல்லது வேறு ஏதாவது கேட்கலாம்.",

    "prompt": "நீங்கள் ஒரு வாடிக்கையாளர் சேவை உதவியாளர்.\n\n## உங்கள் பணி\n- வாடிக்கையாளர் சிக்கல்களைத் தீர்க்கவும்\n- பணிவாகவும் உதவிகரமாகவும் இருங்கள்\n- தெளிவான பதில்கள் கொடுங்கள்\n\n## மொழி\n- தூய தமிழ் அல்லது Tanglish இரண்டும் சரி\n- வாடிக்கையாளரின் பேச்சு முறையை பின்பற்றுங்கள்",

    "allowInterruptions": true
  }
}

Testing Tamil Agents

Test Phrases

# Greetings
"வணக்கம்"
"ஹலோ"

# Order queries
"என் ஆர்டர் எங்கே?"
"எனக்கு ஆர்டர் ஸ்டேட்டஸ் வேணும்"
"order number 12345"

# Tanglish
"Enaku refund venum"
"Order eppo varum?"

# Edge cases
"ஆமா" (yes)
"இல்ல" (no)

Common STT Challenges

Challenge Solution
Aspirated consonants Use Google Chirp for better accuracy
Fast speech Slow down TTS to set pace
English terms Add as keywords

Cost Optimization

Budget Configuration

{
  "sttProvider": "deepgram",
  "ttsProvider": "google",
  "llmProvider": "gemini-2.5"
}

Estimated cost: ₹0.73/minute

Quality Configuration

{
  "sttProvider": "google",
  "sttModel": "chirp_2",
  "ttsProvider": "azure",
  "llmProvider": "gemini"
}

Estimated cost: ₹2.40/minute

Next Steps

  • Hindi - Hindi configuration
  • Assamese - Assamese configuration
  • Indian Languages - All Indian languages
Previous
Hindi
Next
Assamese

On this page

  • Quick Start
  • Provider Options
  • STT (Speech-to-Text)
  • TTS (Text-to-Speech)
  • LLM
  • Azure Tamil Voices
  • Voice Configuration
  • Tanglish (Tamil-English Mix)
  • Tanglish Examples
  • Tamil Script Handling
  • Prompt in Tamil
  • Transliteration Support
  • Formality in Tamil
  • Formal vs Informal
  • Number Handling
  • Tamil Number Words
  • Regional Considerations
  • Tamil Variants
  • Time-based Greetings
  • Complete Example
  • Customer Support Agent
  • Testing Tamil Agents
  • Test Phrases
  • Common STT Challenges
  • Cost Optimization
  • Budget Configuration
  • Quality Configuration
  • Next Steps

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