The Real Cost of DIY: Building a Voice Agent on Twilio + OpenAI

Short summary

The author spent $12K upfront and $18.6K monthly ($223.2K annually) building a voice agent MVP on Twilio + OpenAI. Adding production-grade features (CRM, billing, compliance, white-label, analytics) requires 660 more hours and $146K. For most agencies, platforms like Hermes at $3K/month are actually cheaper and eliminate the operational burden of managing infrastructure, incidents, and compliance.

• •DIY voice agent MVP: $12K upfront + $18.6K/month operational burn
• •Adding production features (CRM, billing, compliance): 660 additional hours + $146K
• •Platforms are cheaper at $3K/month and eliminate developer time and incident response burden

Generated with AI, which can make mistakes.