Voice AI Platform Pricing Comparison 2026
Vapi vs Retell AI vs Bland AI: Cost Simulator & Breakdown
Detailed unit cost teardown of conversational voice orchestration platforms. Learn how platform fees, telephony markup, and TTS selection determine your true monthly invoice.
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Voice Agent Platform Pricing Breakdown
| Platform | Flat Platform Fee | BYON / Telephony | Est. Total (with Cartesia + GPT-4o-mini) |
|---|---|---|---|
| Vapi.ai | $0.05 / minute | $0.015 / min (Twilio) | ~$0.13 / minute |
| Retell AI | $0.08 / minute | Included or BYON | ~$0.16 / minute |
| Bland AI | $0.09 / minute | Bundled Telephony | ~$0.18 / minute |
How to Optimize Voice Agent Overhead
While Vapi.ai offers the lowest base platform fee ($0.05/min), the overall cost of a voice call is determined by 4 underlying layers:
- Platform Fee: Vapi ($0.05) vs Retell ($0.08) vs Bland ($0.09).
- STT (Speech-to-Text): Deepgram Nova-2 (~$0.007/min).
- LLM Intent Engine: GPT-4o-mini (~$0.01/min) vs Claude 3.5 Sonnet (~$0.08/min).
- TTS (Text-to-Speech): Cartesia (~$0.06/min) vs ElevenLabs (~$0.24/min).