I will build a custom voice ai agent using retell ai or vapi


About this gig
Sound Like a Human. Work Like a System.
I build production-ready Voice AI Agents using Retell AI, Vapi, Bland AI, and n8n/Make designed to handle real calls, not demo scripts.
As an engineer, I focus on what actually breaks in production: latency, interruption handling, fallback logic, and clean webhook execution. Every agent is tested before handoff.
What you get:
Custom voice persona matched to your brand
Calendar booking & CRM sync no manual entry
n8n/Make backend for reliable automation
Step-by-step setup guide
Fast, clear communication
Note: Platform fees (Retell/Vapi/Bland) and telephony costs (Twilio) are billed separately by those providers you keep full ownership of your accounts.
I'm building my reputation on Fiverr, which means fast delivery and full attention on your project until it works exactly right.
Message me before ordering tell me your use case and I'll confirm the right package within a few hours.
Get to know Israd A
MSc Graduate in Computer Science Software Engineering, SQT Requirements Engineer
- FromBangladesh
- Member sinceAug 2026
Languages
Bengali, English
FAQ
Do I need to pay for Retell AI, Vapi, or telephony costs separately?
Yes — platform fees (Retell/Vapi/Bland) and telephony costs (Twilio) are billed directly to you by the provider, not included in my price. This keeps costs transparent and you keep full ownership of your accounts. I'll guide setup — takes under 10 minutes.
Can you write a custom voice script/prompt for my business?
Yes — every package includes a custom prompt built around your tone, offer, and common objections. Send me any existing scripts or a rough outline, and I'll refine it into a natural, conversion-focused agent voice.
Can this integrate with my existing CRM (HubSpot, GoHighLevel, etc.)?
Yes — CRM integration (read/write leads, update stages, log notes) is included in Premium via n8n/Make. If your CRM isn't listed, message me first — most platforms with an API or Zapier connector can be integrated.

