AI Voice Agent True-Cost Calculator
A voice AI minute isn't one product — it's four metered services (STT, LLM, TTS, telephony) plus a platform fee, all billing at once. That's why a '$0.05/min' headline becomes $0.15–$0.30 all-in. Pick a stack and your monthly minutes to see the real number.
Low $0.05/min headline — but you assemble and pay 4 more providers.
Total AI talk-time minutes you expect per month.
The real per-minute stack
Estimated monthly cost
$350
Headline vs reality
How it works
- 1Choose a stack: unbundled (assemble your own) or all-inclusive (one rate).
- 2Adjust the LLM and TTS tiers — the two biggest swing factors.
- 3Enter your expected minutes per month.
- 4Read the true all-in $/min and your estimated monthly cost.
Why this matters
Voice-AI vendors advertise the platform/orchestration fee — $0.05/min (Vapi), $0.07 (Retell), $0.09 (Synthflow) — but that excludes speech-to-text, the LLM, text-to-speech, and telephony, each billed per minute on top. A realistic unbundled stack lands at $0.15–$0.25/min, and frontier models or premium voices push it higher. All-inclusive vendors like Bland ($0.11–$0.14) charge more upfront but the headline is the real number. No AI chatbot can generate this figure — it requires assembling live vendor pricing, which is exactly the gap this tool fills.
Frequently asked questions
How much does an AI voice agent cost per minute?
The honest all-in figure is usually $0.15–$0.30/minute, not the $0.05–$0.09 platform fee vendors advertise. The real cost stacks speech-to-text (~$0.005–$0.055), the LLM (~$0.02–$0.16), text-to-speech (~$0.015–$0.05), telephony (~$0.014–$0.02 US), and the platform fee. All-inclusive vendors like Bland bundle it into $0.11–$0.14/min.
Why is the advertised per-minute rate so much lower than the real cost?
Because the headline rate is only the platform/orchestration fee. Unbundled platforms (Vapi, Retell, Synthflow, Deepgram) pass through STT, LLM, TTS, and telephony separately, so your true cost is the sum of 4–6 providers. Some vendors also bill silence/hold time, ring time, or idle connection time.
Should I pick unbundled or all-inclusive voice pricing?
Unbundled (low headline, assemble the stack) is cheaper at scale but needs technical ownership. All-inclusive (Bland $0.11–$0.14/min) costs more per minute but the number is predictable — no surprise invoices. For a non-technical SMB, a flat-fee receptionist (Goodcall, Smith.ai) hides the stack entirely.
Does this include telephony (Twilio) costs?
Yes — the calculator includes a US telephony layer (~$0.014–$0.02/min). International numbers cost 5–10× more, and call transfers are billed as separate legs, so real-world costs can run higher than the estimate.