Why it matters
It handles the latency and interruption plumbing that makes voice agents hard, leaving you the conversation design.
Vapi
Build and deploy customizable AI voice agents for sales and support.
Vapi is developer infrastructure for voice agents: speech recognition, the model, speech synthesis and telephony wired into one pipeline you configure rather than assemble. What it is really selling is the hard part — sub-second turn taking and graceful handling of a caller interrupting, which is what separates a usable voice agent from an unbearable one. That leaves you the design work: what the agent may do, when it must hand off to a human, and what happens when it mishears.