How to read this
Variable cost/min is the estimated provider cost for one real conversation minute: roughly one minute of customer speech plus one minute of AI answer. It is not a fixed invoice price.
Monthly examples below are voice usage only at 120 conversation minutes/day. They do not include your profit, setup work, support time, or taxes.
Currency note: providers usually bill in USD. The EUR values here are practical sales estimates, not accounting-grade exchange-rate calculations.
Shared platform cost
Supabase Pro is optional at MVP stage. For a real production dashboard with manuals/RAG/transcripts/usage, budget about USD 25/month for one shared Supabase project.
That project can serve all six routes and multiple clients until traffic, data isolation, or compliance says we should split it.
Provider truth
Active today: Cloudflare Pages/Worker, browser speech APIs, Groq LLM, OpenAI Whisper/TTS, OpenAI HD route, and Professional ElevenLabs route if the Worker secret remains valid.
Not connected here yet: Azure TTS, Deepgram, LiveKit, Telnyx, Supabase RAG, durable billing, manuals/PDF upload, and real phone numbers.
Local/self-hosted: none of the AI models. Only the product code and UI are ours right now.