Vapi AI

Spin up a voice assistant in minutes: choose a voice, select your model, and place a test call from your browser. Vapi streamlines the plumbing—audio streaming, telephone connectivity, model orchestration—so you focus on what the assistant should do. Start by writing a clear system brief, define tools the agent can call (HTTP endpoints, database lookups, internal APIs), and set conversation rules like barge‑in behavior, confirmation prompts, and escalation conditions. Speech recognition, a reasoning engine, and neural playback are wired for you, letting you iterate on the prompt and toolset instead of wrangling infrastructure.\n\nDeploy wherever users are. Stand up a dedicated phone line for hotlines, order status checks, or after‑hours reception, or drop a lightweight widget into your web app to enable click‑to‑talk support. Streaming turn‑taking keeps conversations snappy—responses begin speaking while text is still generating—so users can interrupt naturally and the agent adapts mid‑sentence. Configure voices, languages, and speaking styles per use case, and enable dynamic switching when the caller’s locale changes. For testing, use the built‑in call simulator, record sessions, and inspect transcripts to pinpoint where prompts or tools need refinement.\n\nBuild practical flows that do real work. For appointment booking, define the slots the agent must collect (service, time, location), connect your calendar API, and add guardrails for double booking. The agent confirms details, sends a follow‑up SMS or email, and writes the record back to your system. For customer support, route by intent: the agent authenticates the caller, checks order state, initiates returns, or gathers triage details before handing off with a clean summary. Sales teams can qualify leads by capturing budget, timeline, and decision maker, pushing structured notes into your CRM and scheduling the next step—all without human intervention.\n\nOperate with confidence at scale. Monitor live metrics (handle time, containment, transfer rate), review call recordings, and run A/B tests across prompts, models, or voices. Add safety rails with content policies, keyword flags, and automatic redaction of PII in transcripts. When the agent is unsure, fall back to a safe reply, request clarification, or transfer to a human with full context. Bring your preferred speech and language providers, rotate keys easily, and burst to high call volumes without re‑architecting. Ship, measure, and iterate until your voice workflow feels as fast and reliable as a great human rep—just always available.