Pricing and engineering overhead
Vapi's official materials are clear on the model: provider costs for STT, LLMs, TTS, and telephony pass through, and Vapi adds its own platform fee on top. That may be fine for builders, but it makes the actual cost picture harder for ordinary operators to reason about.
Konci is stronger because the customer is buying a business product, not a metered orchestration layer plus a pile of provider decisions. That makes Konci easier to budget and much harder to outspend by accident.
Konci wins on real-world cost-to-value because the buyer is not also paying an engineering tax to turn raw voice infrastructure into a working business system.
