Inworld

Inworld describes itself as a research lab and inference provider for realtime AI at consumer scale. It offers first-party text-to-speech and speech-to-text models, a router that lets customers choose their own large language models, and the inference infrastructure underneath, all through modular APIs. Named products include Realtime TTS-2, a faster TTS-2 Flash variant, Realtime STT and a Realtime API for voice agents. The company targets consumer-facing applications such as social and companion apps, learning, health and wellness, agentic workforce use cases and games and media. It positions itself on price, publishing a comparison of its rates against other voice and language model providers as of June 2026, and says customers cut voice and AI costs by 40 to 95 percent after moving. It names the companion app OtherHalf as a customer that reached one million users quickly, and lists HIPAA and GDPR compliance badges. The site provides developer resources, pricing and a contact sales route, and announces that Inworld has acquired Ultravox to speed up its speech-to-speech research and voice agent capabilities.