Retell $0.12/min already bundles LLM, TTS, voice infra, and speech removal — no hidden add-ons. When OpenAI is integrated directly it replaces the GPT-4.1 component and may reduce cost at volume.
Number provisioning
Client ports existing US numberNo porting fee (free)
New local number (Twilio $1/mo)Charge client $5/mo
New toll-free number (Twilio $2/mo)Charge client $10/mo
Toll-free inbound Twilio rate$0.022/min — raises floor to $0.142/min
US porting is free on Twilio — use as a sales differentiator. Toll-free clients need a surcharge or steer them to local numbers.
Outbound use cases by tier
Appointment confirmation callsAll plans
Reschedule / no-show outreachGrowth + Pro
Lead follow-up campaignsPro only
Payment reminder callsPro only
SMS fallback if no answerAdd-on: $0.0083/msg
Outbound costs 65% more on Twilio vs inbound ($0.014 vs $0.0085/min). Outbound plan prices are set higher to reflect this.
One-time setup fee by provider size
Solo / Single location
1 provider, <500 calls/mo
$499
✓ Number config / port
✓ Agent script setup
✓ Calendar integration
✓ 1 hr training
✗ Custom flows
✗ Multi-location
Small practice Most common
2–5 providers, 1–2 locations
$999
✓ Number config / port
✓ Custom agent script
✓ Calendar + EHR hook
✓ 2 hr training
✓ Inbound + outbound
✗ Multi-location
Multi-location / Group
5+ providers, 3+ locations
$1,999+
✓ All locations setup
✓ Custom call flows
✓ Full integrations
✓ Staff training session
✓ SLA + priority support
✓ Dedicated dev hours
Add $200–300 for international number porting. Add $150 per extra location beyond base tier. Setup fee non-refundable, collected before work begins.