Vapi is a developer-focused platform that specializes in building, launching, and managing advanced voice AI agents for phone-based interactions. Founded in 2020 and based in San Francisco, Vapi offers a highly customizable, API-first platform that allows developers to create sophisticated voice agents for various applications, including customer service calls and sales campaigns.

The platform supports a "bring your own stack" model, enabling users to integrate their preferred speech-to-text, large language models, and text-to-speech technologies. Vapi provides tools and SDKs for quick development, multilingual support for over 100 languages, and features like automated testing and A/B testing to optimize performance. It primarily serves developers, engineering teams, and tech-savvy businesses, ranging from startups to Fortune 500 companies, who require a flexible and powerful voice AI solution.