Many businesses struggle to scale conversational experiences across voice channels. Whether it’s routing customer calls, automating reminders, or generating outbound engagement, building reliable and intelligent voice agents has traditionally been expensive, time-consuming, and challenging to customize.
Vapi
Vapi is transforming this space by providing developers with an API-first voice AI platform designed to simplify everything from call handling to conversational logic. With powerful workflows, deep integrations, and enterprise-grade reliability, Vapi enables businesses to launch production-ready voice agents faster than ever.
Used by trailblazing startups and Fortune 500 companies alike, Vapi has already powered over 62 million calls and deployed more than 1 million assistants, with a growing developer community of over 225,000.
Use Cases for Voice AI
From inbound support to outbound engagement, companies use Vapi for a wide range of voice AI applications:
- Inbound support calls: Handle high volumes with intelligent triage, FAQ handling, and data capture. Vapi currently powers 400,000+ daily inbound calls.
- Outbound voice automation: Automate reminders, surveys, onboarding, or sales outreach with custom voice workflows.
- Healthcare coordination: Platforms like Ellipsis Health and Luma Health use Vapi to automate patient outreach, appointment scheduling, and wellness checks—while remaining HIPAA-compliant.
- Logistics and dispatch: FleetWorks uses Vapi to automate job assignments, saving hundreds of engineering hours monthly through intelligent routing and API-based tool calls.
- Financial services: Firms like NY Life automate claims processing and customer verification using secure, auditable voice workflows.
- Field services and SaaS: Housecall Pro and Instawork utilize AI agents to onboard users, manage rescheduling, and resolve issues without requiring human intervention.
These examples demonstrate Vapi’s flexibility in serving both mission-critical use cases and everyday customer interactions, making it a valuable voice AI partner for any industry.
A key technical requirement was the ability to bring our own stack — Vapi’s developer-friendly API-first approach made this possible.
Quang Tran, CTO, FleetWorks
Vapi Features
- A/B experiments: Continuously test different prompts, voice styles, and workflows to refine performance.
- API-native: Every feature is exposed via APIs, supporting thousands of configuration points and complete programmatic control.
- Automated testing: Create voice agent test suites to detect hallucinations or performance risks before deployment proactively.
- Bring your own models: Use your API keys for transcription, LLMs, or text-to-speech—or plug in custom models.
- Global jumping: Mid-call redirection allows users to switch topics, escalate to a human, or change direction seamlessly.
- Guardrails: Built-in AI safety mechanisms ensure data integrity and reduce hallucinations.
- Launch support: Dedicated forward-deployed engineers help you go live within a week.
- Low latency: Sub-500ms round-trip latency ensures real-time responsiveness at scale.
- Multilingual: Supports over 100 languages with seamless mid-call language switching.
- Node-level intelligence: Each workflow step can utilize a distinct model, language, or voice to achieve specific behavior.
- PCI, SOC2, HIPAA compliance: Ready for regulated industries like healthcare and finance.
- Tool calling: Dynamically access your APIs to fetch data or perform actions in real time.
- Workflows: Visual, no-code/low-code interface for designing call logic that integrates cleanly with backend systems.
These features combine low-code accessibility with deep customization, making Vapi suitable for both business users and engineers.
How Vapi Works
Getting started with Vapi is fast and straightforward:
- Choose a workflow: Start with 1,000+ templates or build your own with Vapi’s visual editor.
- Plug it in: Integrate into your phone systems, apps, or websites with Vapi’s SDKs (TypeScript, Python, React, cURL).
- Launch and scale: Deploy within days and scale to millions of calls with enterprise-grade uptime and latency.
Vapi workflows enable teams to design, deploy, and observe high-stakes call logic across various industries. Each node in a workflow acts as its intelligent agent, supporting multilingual branching, human handoffs, and API-triggered logic with full observability.
Whether you’re handling a few hundred or millions of calls per day, Vapi gives you everything you need to automate with confidence—while remaining fully configurable to your stack and goals.
Ready to build your own voice agent?
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