Inworld AI has acquired Ultravox.ai, a company that provides a platform for building real-time voice agents. The acquisition aims to advance Inworld AI's speech-to-speech AI and real-time inference infrastructure. Ultravox’s expertise in turn-taking and interruption-handling will be integrated into Inworld’s AI research lab, which serves consumer-scale applications.
Ultravox.ai was founded by Zach Koch, Matt Welsh, Hessam Bagherinezhad, and Justin Uberti, and develops voice agent tooling. Inworld CEO Kylan Gibbs stated that the teams will continue building the platform. Following the acquisition, Ultravox voices will upgrade to Realtime TTS-2, which is expected to improve voice experiences for developers. The financial terms of the transaction were not disclosed.