Migrate from Vapi to Edesy

This guide walks you through migrating your Vapi voice agents to Edesy. Most migrations complete in 3-5 days with our support.

Why Switch from Vapi?

Pre-Migration Checklist

Before you start, gather these from your Vapi account:

• System prompts for all assistants
• Function definitions (if using function calling)
• Phone numbers you want to port
• Webhook URLs you're using
• CRM integration details
• Voice/TTS configuration

Step 1: Create Your Edesy Account

1. Go to voice-agent.edesy.in
2. Sign up with email or Google
3. Complete onboarding wizard

Step 2: Convert Your System Prompt

Vapi and Edesy both use system prompts, but with some differences.

Vapi Prompt Structure

{
  "model": {
    "provider": "openai",
    "model": "gpt-4",
    "systemPrompt": "You are a helpful assistant..."
  }
}

Edesy Prompt Structure

You are a helpful assistant...

[Your complete system prompt here]

In Edesy, the system prompt is plain text entered in the Agent Setup page. No JSON wrapping required.

Prompt Conversion Tips

1. Remove JSON structure - Just copy the text content
2. Add language instructions - If targeting Indian users, add language preferences
3. Update company references - Replace Vapi-specific mentions
4. Keep function instructions - Function calling syntax is similar

Example Conversion

Vapi:

{
  "systemPrompt": "You are Alex, a sales assistant for TechCorp. Qualify leads by asking about company size, budget, and timeline. Be friendly but professional."
}

Edesy:

You are Alex, a sales assistant for TechCorp.

ROLE:
Qualify leads by asking about company size, budget, and timeline.

PERSONALITY:
Be friendly but professional. Speak naturally and conversationally.

LANGUAGE:
Respond in the same language the customer uses. You support English, Hindi, and other Indian languages.

Step 3: Configure Voice Settings

Vapi Voice Config

{
  "voice": {
    "provider": "11labs",
    "voiceId": "rachel"
  }
}

Edesy Equivalent

In Edesy Dashboard:

1. Go to Agent Setup > Voice Settings
2. Select TTS Provider (ElevenLabs, OpenAI, Google, etc.)
3. Choose voice from dropdown
4. Test with preview

Voice Mapping

For Indian languages, Edesy offers additional options:

• Sarvam Bulbul - Best for Hindi, Tamil, Telugu
• Azure Neural - Good for most Indian languages
• Google TTS - Broad language coverage

Step 4: Set Up Function Calling

Vapi and Edesy both support OpenAI-style function calling.

Vapi Function Definition

{
  "functions": [
    {
      "name": "book_appointment",
      "description": "Book an appointment for the customer",
      "parameters": {
        "type": "object",
        "properties": {
          "date": { "type": "string" },
          "time": { "type": "string" }
        }
      }
    }
  ]
}

Edesy Function Definition

In Edesy, add functions in the Agent Setup > Functions section:

{
  "name": "book_appointment",
  "description": "Book an appointment for the customer",
  "parameters": {
    "type": "object",
    "properties": {
      "date": {
        "type": "string",
        "description": "Date in YYYY-MM-DD format"
      },
      "time": {
        "type": "string",
        "description": "Time in HH:MM format"
      }
    },
    "required": ["date", "time"]
  }
}

The format is identical - you can copy functions directly.

Webhook Configuration

Set your webhook URL in Agent Setup > Webhooks:

• Function webhook URL: Receives function calls
• Call status webhook: Receives call events

Step 5: Telephony Setup

Option A: Use Edesy Numbers (Recommended)

1. Go to Phone Numbers in dashboard
2. Purchase a new number or request porting
3. Assign to your agent

Option B: Keep Your Twilio Numbers (BYOP)

1. Go to Phone Numbers > BYOP
2. Enter Twilio credentials:
   • Account SID
   • Auth Token
   • Phone Number
3. Configure Twilio to forward to Edesy webhook

Option C: Use Exotel (India)

For India-specific numbers:

1. Go to Phone Numbers > BYOP
2. Select Exotel as provider
3. Enter API credentials
4. Map your Exotel numbers

Step 6: Migrate Webhooks

Vapi Webhook Events

• call-start
• call-end
• transcript
• function-call

Edesy Webhook Events

Update your webhook handlers to use Edesy's event format. See Webhooks Documentation for payload details.

Step 7: Test Your Migration

Before going live:

1. Test inbound calls - Call your Edesy number
2. Test outbound calls - Use the web dialer
3. Verify functions - Trigger each function
4. Check webhooks - Confirm events are received
5. Test languages - Try Hindi and other languages

Testing Checklist

• Agent answers calls correctly
• System prompt behavior matches Vapi
• Functions execute successfully
• Webhooks fire correctly
• Voice quality is acceptable
• Latency feels natural
• Indian languages work well

Step 8: Go Live

Cutover Options

Option 1: Instant Switch

• Point phone numbers to Edesy
• Decommission Vapi immediately

Option 2: Gradual Migration

• Route percentage of calls to Edesy
• Increase over time
• Monitor metrics at each stage

Option 3: New Number First

• Get new numbers on Edesy
• Test with real traffic
• Port old numbers later

Common Issues

"My agent sounds different"

Voice quality varies by provider. Try different TTS providers or voices to match your preferred sound.

"Latency feels higher/lower"

Edesy is optimized for low latency. If you experience issues:

• Check your STT/TTS provider selection
• Try Gemini Live for native audio (lowest latency)
• Contact support for latency optimization

"Functions aren't working"

• Verify webhook URL is accessible
• Check function parameter types match
• Review webhook logs in dashboard

"Indian languages don't work well"

• Ensure you've selected appropriate STT/TTS for the language
• See Language Configuration for recommended providers

Feature Comparison

Need Help?

Our migration team is happy to assist:

• Free migration consultation: Book a call
• Email: [email protected]
• Documentation: Continue reading our docs

We've helped many teams migrate from Vapi and know the common challenges.