# Migrate from Retell AI

> Step-by-step guide to migrate your voice agents from Retell AI to Edesy

Source: https://edesy.in/docs/voice-agent/migration/from-retell

This guide helps you migrate from Retell AI to Edesy. Most migrations complete in 3-5 days.

## Why Switch from Retell AI?

| Feature | Retell AI | Edesy |
|---------|-----------|-------|
| Pricing | $0.07-0.10/min | ₹4/min (~$0.07) |
| Indian Languages | 5-6 | 22+ native |
| Response Latency | 600-1000ms | <500ms |
| India Telephony | US-focused | Exotel + Twilio |
| Support | US timezone | India timezone |
| Implementation | Self-serve | Hands-on help |

## Pre-Migration Checklist

Gather these from your Retell AI account:

- [ ] Agent configurations (prompts, settings)
- [ ] Custom LLM settings
- [ ] Voice settings (provider, voice ID)
- [ ] Phone number inventory
- [ ] Webhook endpoints
- [ ] Integration credentials (CRM, etc.)

## Step 1: Export Retell Configuration

### From Retell Dashboard

1. Go to your Retell AI dashboard
2. Navigate to each agent
3. Copy the following:
   - General Prompt
   - Begin Message
   - Model settings
   - Voice configuration

### Via Retell API

```bash
# Get agent details
curl -X GET "https://api.retellai.com/v1/agents/{agent_id}" \
  -H "Authorization: Bearer YOUR_RETELL_API_KEY"
```

Save the response for reference during migration.

## Step 2: Create Edesy Agent

### Map Retell Fields to Edesy

| Retell Field | Edesy Equivalent | Location |
|--------------|------------------|----------|
| General Prompt | System Prompt | Agent Setup |
| Begin Message | First Message | Agent Setup |
| Model | LLM Provider | Providers |
| Voice | TTS Provider + Voice | Providers |
| Language | Language Setting | Agent Setup |

### Prompt Conversion

**Retell AI:**
```
You are Sarah, a customer service agent for XYZ Company.
Help customers with their orders and inquiries.
Be polite and professional.
```

**Edesy (enhanced):**
```
You are Sarah, a customer service agent for XYZ Company.

ROLE:
Help customers with their orders and inquiries. You can:
- Check order status
- Process returns
- Answer product questions
- Escalate complex issues

PERSONALITY:
Be polite and professional. Use a warm, helpful tone.

LANGUAGE:
Respond in the customer's language. You support English, Hindi,
Tamil, Telugu, and other Indian languages.

RULES:
- Always verify customer identity before sharing order details
- Offer to transfer to human agent if customer requests
- Never promise refunds without verification
```

## Step 3: Configure Voice Settings

### Retell Voice Configuration
```json
{
  "voice_id": "sarah",
  "voice_provider": "elevenlabs"
}
```

### Edesy Configuration

1. Go to Agent Setup > Voice Settings
2. Select TTS Provider
3. Choose voice from available options
4. Adjust speed and pitch if needed

### Voice Mapping Table

| Retell Voice | Edesy Alternative |
|--------------|-------------------|
| ElevenLabs voices | ElevenLabs (same voices available) |
| OpenAI voices | OpenAI TTS (alloy, nova, shimmer, etc.) |
| PlayHT voices | Similar options in ElevenLabs/OpenAI |

### Indian Language Recommendations

For Hindi and other Indian languages:

| Language | Recommended Provider | Voice |
|----------|---------------------|-------|
| Hindi | Sarvam Bulbul | meera, arvind |
| Tamil | Azure Neural | ta-IN-PallaviNeural |
| Telugu | Azure Neural | te-IN-ShrutiNeural |
| Bengali | Azure Neural | bn-IN-TanishaaNeural |

## Step 4: Set Up LLM Provider

### Retell LLM Settings
```json
{
  "llm_id": "gpt-4",
  "temperature": 0.7
}
```

### Edesy LLM Settings

Navigate to Providers > LLM and configure:

| Setting | Options |
|---------|---------|
| Provider | OpenAI, Gemini, Anthropic, Azure |
| Model | gpt-4o, gemini-2.5-flash, claude-3-haiku |
| Temperature | 0.0 - 1.0 |

**Recommendation**: Try `gemini-2.5` for lowest latency with good quality.

## Step 5: Migrate Function Calling

Retell AI and Edesy both support OpenAI-style functions.

### Retell Function Definition
```json
{
  "name": "transfer_call",
  "description": "Transfer to human agent",
  "parameters": {
    "type": "object",
    "properties": {
      "department": {
        "type": "string",
        "enum": ["sales", "support", "billing"]
      }
    }
  }
}
```

### Edesy Function Definition

Copy the same JSON to Edesy's Function Setup. Format is identical.

### Built-in Functions

Edesy provides these without custom configuration:
- `end_call` - End the conversation
- `transfer_call` - Transfer to another number
- `send_sms` - Send SMS to caller

## Step 6: Telephony Migration

### Option A: Get New Edesy Numbers

1. Go to Phone Numbers
2. Browse available numbers
3. Purchase and assign to agent

### Option B: Port Retell Numbers

Contact support to port existing numbers:
- US numbers: Usually 3-5 business days
- India numbers: Usually 5-7 business days

### Option C: BYOP (Bring Your Own Provider)

Keep your existing telephony:

1. Go to Phone Numbers > BYOP
2. Select provider (Twilio, Exotel, etc.)
3. Enter credentials
4. Configure webhook forwarding

## Step 7: Webhook Migration

### Retell Webhook Events

| Retell Event | Edesy Equivalent |
|--------------|------------------|
| call_started | call.started |
| call_ended | call.ended |
| call_analyzed | call.analyzed |
| agent_response | agent.response |

### Update Webhook Handler

**Retell payload:**
```json
{
  "event": "call_ended",
  "call_id": "xxx",
  "transcript": "..."
}
```

**Edesy payload:**
```json
{
  "event": "call.ended",
  "call_id": "xxx",
  "data": {
    "transcript": "...",
    "duration_seconds": 120,
    "recording_url": "..."
  }
}
```

See [Webhooks Documentation](https://edesy.in/docs/voice-agent/features/webhooks) for complete payload reference.

## Step 8: CRM Integration

### Retell Integrations
Retell primarily uses webhooks for CRM integration.

### Edesy Native Integrations

Edesy offers native connectors for:
- **Salesforce** - Bi-directional sync
- **HubSpot** - Contacts and deals
- **Zoho CRM** - Full integration
- **Freshsales** - Lead management
- **Custom** - Webhook-based

Configure in Settings > Integrations.

## Step 9: Testing

### Test Scenarios

1. **Basic conversation flow**
   - Call the agent
   - Verify greeting
   - Test common questions

2. **Function calling**
   - Trigger each custom function
   - Verify webhook delivery
   - Check CRM updates

3. **Edge cases**
   - Test interruptions
   - Test silence handling
   - Test language switching

4. **Transfer scenarios**
   - Test call transfer
   - Verify transfer audio

### Testing Checklist

- [ ] Agent answers with correct greeting
- [ ] Conversation flow matches Retell
- [ ] Functions execute correctly
- [ ] Webhooks fire properly
- [ ] Voice quality is good
- [ ] Latency is acceptable
- [ ] Indian languages work
- [ ] CRM integration works

## Step 10: Go Live

### Migration Strategies

**Big Bang**
- Switch all traffic at once
- Fastest transition
- Higher risk

**Phased**
- Migrate one use case at a time
- Lower risk
- Takes longer

**Shadow Testing**
- Run both platforms simultaneously
- Compare results
- Highest confidence

### Go-Live Checklist

- [ ] All agents migrated and tested
- [ ] Phone numbers configured
- [ ] Webhooks updated
- [ ] CRM integration verified
- [ ] Team trained on Edesy dashboard
- [ ] Monitoring set up
- [ ] Rollback plan documented

## Feature Comparison

| Retell Feature | Edesy Status |
|----------------|--------------|
| Custom LLM | ✅ Supported |
| Function Calling | ✅ Supported |
| Voice Customization | ✅ Supported |
| Call Recording | ✅ Supported |
| Transcripts | ✅ Supported |
| Analytics | ✅ Supported |
| Webhooks | ✅ Supported |
| HIPAA Compliance | ✅ Available (Enterprise) |
| Custom Voices | ✅ Voice cloning available |

## Common Migration Issues

### "Response latency is different"

Edesy is optimized for lower latency. If you notice differences:
- Check LLM provider (Gemini is fastest)
- Verify STT/TTS settings
- Contact support for optimization

### "Voice doesn't sound the same"

- Try the exact same voice provider/ID
- Adjust speed and pitch settings
- Consider trying Indian-optimized voices

### "Functions behave differently"

- Verify webhook URL is correct
- Check parameter types match
- Review function logs in dashboard

### "Transcript format is different"

Edesy transcripts may have slight formatting differences. Update your webhook handlers to accommodate.

## Need Help?

Our team provides free migration support:

- **Migration consultation**: [Book a call](https://voice-agent.edesy.in/)
- **Email**: support@edesy.in
- **Documentation**: Explore our [full docs](https://edesy.in/docs/voice-agent)

We've migrated many teams from Retell AI and understand the process well.