Vapi.
A developer-oriented Voice AI API with broad provider choice, phone tooling, assistants, and workflow primitives.
public snapshot
Understand the commercial shape
Vendor pages checked 2026-07-17. Pricing, availability, and included components can change without notice.
marketUS + global developer
deliveryAPI-first modular platform
price signal$0.05 platform/min plus speech, model, and telephony
checked2026-07-17
decision
When to shortlist Vapi
A provider page should narrow a discovery call, not replace a technical proof of concept or contract review.
Best fit
Product teams that want configurable providers and a large API surface.
Questions to ask
- Does the quoted minute include STT, TTS, LLM, telephony, recording, and failed attempts?
- Which countries, number types, languages, and transfer destinations are production-supported?
- What concurrency, rate limits, data residency, retention, and support terms apply?
- Can you bring your own speech, model, SIP carrier, and phone numbers without markup?
open-source path
Open alternatives to Vapi
Self-hosting changes the bill and the ownership boundary. These starting points expose more of the runtime while leaving model and carrier costs intact.