AI voice pricing is unusually easy to misunderstand because two vendors can publish a per-minute number that represents completely different portions of the technology stack.
Total-cost formula
A useful AI voice TCO model includes:
Platform + STT + LLM + TTS + Telephony + Fixed Fees + Concurrency + Security + Implementation + Integrations + Human Escalation
Current commercial models
Vapi currently publishes hosting around $0.05 per minute, but model-provider costs can be separate. Retell AI publishes a configuration-dependent range around $0.07-$0.31 per minute. Bland AI has offered bundled core-AI structures around $0.14 per minute on Start and $299 plus about $0.12 per minute on Build. Rosie AI packages minutes inside SMB receptionist plans. Synthflow enterprise contracts begin much higher because the buyer is purchasing a managed implementation. PolyAI uses custom enterprise per-minute economics. Sierra prices around outcomes rather than minutes.
Why $0.05 is not always cheaper than $0.14
If the $0.05 rate is only orchestration and the $0.14 rate includes speech recognition, language model and voice synthesis, the finished cost relationship can reverse.
CCM therefore assigns a cost-completeness state such as:
- hosting only
- partial stack
- core AI bundled
- fully bundled with telephony
- managed enterprise
- outcome based
- custom unknown
Standard scenarios
Model AI voice at workloads such as:
- 1,000 connected minutes/month
- 10,000 minutes/month
- 100,000 minutes/month
Then add the actual selected components.
Implementation cost
Enterprise AI projects can require significant implementation and integration. Amortize one-time implementation over the analysis period:
Monthly Amortized Implementation = One-Time Implementation / Analysis Months
Human escalation
AI rarely eliminates every human interaction. A hybrid model should include the cost of calls that transfer to employees or BPO agents.
Measure successful outcomes
The strongest economic metrics are:
- cost per connected minute
- cost per completed interaction
- cost per successful outcome
where evidence supports each metric.
Bottom line
Never compare AI voice platforms by the headline minute rate until you have identified exactly which layers are included.
Use the AI Voice ROI Calculator or compare AI voice platforms.