Custom AI Voice Agent | VAPI | Retell | FastAPI + TwilioAnkur Srivastava
VAPI / Retell Alternative - Stop Paying $0.12/min Platform Fees.
I build CUSTOM AI voice agents where YOU own the code. No monthly platform tax.
Most freelancers resell VAPI/Retell at a markup. I built a production system from scratch - 4 core / 16GB RAM, tested for 50 concurrent calls.
What You Get:
✓ Custom FastAPI Backend (your server, no vendor lock-in)
✓ Twilio Voice + Deepgram STT ($0.004/min) + GPT-4o + ElevenLabs
✓ 50 Concurrent Calls Support
✓ Appointment Booking (Calendly, Cal.com, GoHighLevel)
✓ n8n / Make / 【entity-Zapier¦canonical_name=Zapier】 / Google Sheets Integration
✓ Call Recording, Logs, Transcripts & Analytics Dashboard
✓ CRM Integration - 【entity-HubSpot¦canonical_name=HubSpot】, GoHighLevel, Sheets
VAPI vs My Custom Build:
VAPI: $0.12/min + $500 setup = $620 for 1000 mins
My Custom: $0.02/min + $600 setup = $80 for 1000 mins + YOU OWN CODE
Save $540 every 1000 mins. No lock-in.
Tech Stack I Use:
FastAPI • Twilio • Deepgram • ElevenLabs • GPT-4o • n8n • Make.com
Perfect For:
Dental Clinics, Immigration Firms, Real Estate, Home Services, Agencies tired of VAPI bills.
What's Included in Source Code:
Full backend, deployment script (Railway/AWS), Twilio setup guide, prompt library.
I also built: Passport MRZ Parser (92% accuracy) & Clinic Booking Agent (23 sec avg).
Click Buy or message me - I'll show live demo on 16GB server.
Ankur's other services
Contact for pricing
Duration2 weeks
Tags
Retell Ai
Vapi
AI Agent Developer
Service provided by
Ankur Srivastava Ghaziabad, India
- 1
- Followers
Custom AI Voice Agent | VAPI | Retell | FastAPI + TwilioAnkur Srivastava
Contact for pricing
Duration2 weeks
Tags
Retell Ai
Vapi
AI Agent Developer
VAPI / Retell Alternative - Stop Paying $0.12/min Platform Fees.
I build CUSTOM AI voice agents where YOU own the code. No monthly platform tax.
Most freelancers resell VAPI/Retell at a markup. I built a production system from scratch - 4 core / 16GB RAM, tested for 50 concurrent calls.
What You Get:
✓ Custom FastAPI Backend (your server, no vendor lock-in)
✓ Twilio Voice + Deepgram STT ($0.004/min) + GPT-4o + ElevenLabs
✓ 50 Concurrent Calls Support
✓ Appointment Booking (Calendly, Cal.com, GoHighLevel)
✓ n8n / Make / 【entity-Zapier¦canonical_name=Zapier】 / Google Sheets Integration
✓ Call Recording, Logs, Transcripts & Analytics Dashboard
✓ CRM Integration - 【entity-HubSpot¦canonical_name=HubSpot】, GoHighLevel, Sheets
VAPI vs My Custom Build:
VAPI: $0.12/min + $500 setup = $620 for 1000 mins
My Custom: $0.02/min + $600 setup = $80 for 1000 mins + YOU OWN CODE
Save $540 every 1000 mins. No lock-in.
Tech Stack I Use:
FastAPI • Twilio • Deepgram • ElevenLabs • GPT-4o • n8n • Make.com
Perfect For:
Dental Clinics, Immigration Firms, Real Estate, Home Services, Agencies tired of VAPI bills.
What's Included in Source Code:
Full backend, deployment script (Railway/AWS), Twilio setup guide, prompt library.
I also built: Passport MRZ Parser (92% accuracy) & Clinic Booking Agent (23 sec avg).
Click Buy or message me - I'll show live demo on 16GB server.
Ankur's other services
Contact for pricing