AI voice agent platforms pricing
Voice agent platforms charge by the minute of conversation, but their headline rates are not comparable: Retell and Vapi quote a platform fee of about 5 cents a minute with the language model, voice and phone line billed on top, while Bland quotes an all-in rate. Synthflow has moved to annual enterprise contracts.
AI price index
How AI model prices are moving underneath these tools
$2
per million input tokens for the cheapest frontier LLM, 90% less than Oct 2023. Our view for 2028: $0.50 to $4, and $0.20 to $5 by 2030.
Open the AI price indexAI voice agent platforms compared
Current list prices as last read from each pricing page.
| Product | Starts at | Top listed plan | Priced by | Free plan | History |
|---|---|---|---|---|---|
 Bland AI | $0.12 per minute, all-in, plus a $299 monthly platform feeBuild, USD per minute of talk time, all-in rate (includes LLM, STT and TTS; Build also has a $299 monthly platform fee) | $0.14 per minute, all-in, no platform fee, 100 calls a dayStart | Usage based | No | read Oct 2026 |
 Retell AI | $0.055 per minute, platform fee only; LLM, voice (from $0.015) and telephony extra, $0.07 to $0.31 all-inPay-as-you-go (voice infrastructure), USD per minute, voice infrastructure (platform) fee, excluding LLM, TTS and telephony | single paid plan | Usage based | No | read Oct 2026 |
 Synthflow | $30000 per year, minimum annual contractEnterprise, USD per year, minimum Enterprise contract | single paid plan | Contact sales | No | read Oct 2026 |
 Vapi | $0.05 per minute, hosting fee only; models and telephony passed through at costHosting (pay-as-you-go), USD per minute, Vapi hosting (platform) fee, excluding models and telephony | $999 per month minimum, success package priced at 10% of Vapi hosting fees, 30 concurrent callsPro | Usage based | No | read Oct 2026 |
Head to head
Two products on one chart, plans side by side.
AI voice agent platforms pricing questions
- What does a AI voice agent platform cost?
- Paid plans start at $0.12 per minute, all-in, plus a $299 monthly platform fee for Bland AI (USD per minute of talk time, all-in rate (includes LLM, STT and TTS; Build also has a $299 monthly platform fee)), $0.055 per minute, platform fee only; LLM, voice (from $0.015) and telephony extra, $0.07 to $0.31 all-in for Retell AI (USD per minute, voice infrastructure (platform) fee, excluding LLM, TTS and telephony), $30000 per year, minimum annual contract for Synthflow (USD per year, minimum Enterprise contract), $0.05 per minute, hosting fee only; models and telephony passed through at cost for Vapi (USD per minute, Vapi hosting (platform) fee, excluding models and telephony). Prices are as shown on each pricing page when it was last read.
- What is AI voice agent platform pricing based on?
- Bland AI and Retell AI and Vapi: usage based. Synthflow: contact sales.
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