We've been talking to dozens of AI agent founders over the past few months and one thing keeps coming up, only few actually knows what it costs them to serve a single customer.
With traditional SaaS it's simple. Seat-based pricing, predictable infra costs, clean unit economics.
With AI agents it's a completely different beast. You've got LLM tokens, voice minutes, vector DB queries, tool calls, cloud compute. All variable, all billed separately, none of it tied to a specific customer or workflow.
You get a monthly invoice from 5 different vendors. You make a guess. And you find out months later you've been losing money on your best customers. Even OpenAI itself uses Metronome just to handle ChatGPT's billing complexity.
