Rough monthly run-rate for Vapi, Retell, Bland, and a Twilio Voice + OpenAI Realtime stack. Platform minutes are only one line item.
| Provider | LLM | STT | TTS | Telephony | Platform | Total | Notes |
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This calculator gets you close on call runtime. It doesn't cover the boring SaaS plumbing that starts hurting once users pay you.
Callforge is that billing and provisioning layer for voice-agent products. Get founder pricing See the preview