The Call Supplai blog
Practical guides for agencies building and selling Retell AI voice agents under their own brand.
AI Receptionists for Medical Practices: What HIPAA Actually Requires
An AI receptionist handling patient calls is a HIPAA business associate. What that means for BAAs, Security Rule safeguards and reminder-call rules.
By Oscar OrtegaHow to Price AI Voice Agent Services for Your Clients
How agencies price AI voice agents: setup fees, retainers with included minutes, overage and outcome pricing, plus a worked margin example on Retell AI.
By Oscar OrtegaHow to Start an AI Voice Agency in 2026: A Step-by-Step Guide
How to start an AI voice agency in 2026: pick a niche, build on Retell AI, white-label it under your brand, price your service and land first clients.
By Oscar OrtegaRetell AI Pricing Explained: What Agencies Pay Per Client
Retell AI costs $0.07 to $0.31 per minute plus $2 per phone number. See how the price breaks down and what one client costs an agency each month.
By Oscar OrtegaRetell AI vs Vapi vs Synthflow for Agencies (2026)
Retell AI vs Vapi vs Synthflow for agencies in 2026: per-minute pricing, HIPAA BAA terms, and white-label options for reselling AI voice agents.
By Oscar OrtegaWhat Is a White-Label AI Voice Agent? A Guide for Agencies
A white-label AI voice agent runs on another company's voice AI but is sold under your brand. How it works, what it costs, and how agencies resell it.
By Oscar Ortega