Inworld acquires Ultravox to bolster real-time voice AI
Inworld has acquired Seattle-based voice AI startup Ultravox, formerly known as Fixie, for an undisclosed amount. The deal brings Ultravox’s real-time speech models, which handle conversational turn-taking and interruptions, into Inworld’s platform for character-driven AI.
Ultravox launched in 2022 and raised $17 million to build its voice technology. Its team will join Inworld, which develops AI for interactive characters in gaming, virtual worlds, and metaverse applications. The acquisition follows Inworld’s broader push to integrate low-latency, naturalistic voice capabilities into its AI agents.
The move reflects growing competition in real-time voice AI, a space that now includes Seattle’s Nuance Labs, which secured $50 million in September to develop a full-duplex conversational model. Unlike Nuance Labs’ focus on simultaneous speech processing, Ultravox’s models emphasize fluid turn-taking—an edge for applications requiring dynamic, multi-speaker interactions.
For Inworld, the acquisition may help differentiate its offering in a crowded market where latency and emotional nuance remain persistent challenges. The company has yet to disclose how Ultravox’s technology will be integrated, but its existing partnerships with game studios suggest a near-term focus on interactive entertainment.
Seattle’s role as a hub for voice AI continues to strengthen, with Superhuman’s recent office expansion and McGraw Hill’s acquisition of edtech startup Teachally further signaling the region’s appeal to AI-driven companies.
Sources: msn.com
“The deal signals Inworld’s push to own the full conversational stack, from latency to turn-taking, as real-time voice AI becomes table stakes for gaming and virtual worlds.”
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