What is Vapi?
Vapi is a cutting-edge platform designed for developers to create voice AI agents that feel human and deliver real results. Whether you're a startup or a Fortune 500 company, Vapi helps you scale phone operations with ease. It’s the most configurable API for building leading voice AI products.
What are the features of Vapi?
- Multilingual Support: Talk to agents in 100+ languages, including English, Spanish, and Mandarin.
- API-Native: Everything is exposed as an API, with thousands of configurations and integrations.
- Automated Testing: Design test suites to identify hallucination risks before going live.
- Bring Your Own Models: Use your own API keys for transcription, LLM, or text-to-speech models.
- Tool Calling: Plug in your APIs to fetch data and perform actions intelligently.
- A/B Experiments: Test different prompts, voices, and flows to optimize performance.
What are the use cases of Vapi?
- Inbound Calls: Powers 10,000+ daily calls and saves hundreds of engineering hours monthly.
- Outbound Calls: Scale up and down to millions of calls in minutes with ultra-low latency.
- Enterprise Solutions: Reliable, scalable, and secure with 99.9% uptime and enterprise-grade security.
How to use Vapi?
- Choose Your Workflow: Pick from thousands of pre-made templates or build your own.
- Plug It In: Integrate with your telephony, website, or app seamlessly.
- Done: Handle millions of calls and monitor their performance effortlessly.







