Inworld AI

Inworld AI helps developers build realtime AI experiences with natural speech, intelligent conversations, and low-latency interactions. They provide tools for Text-to-Speech, Speech-to-Text, LLM routing, and realtime voice applications across consumer products.

Their Realtime TTS delivers natural, expressive voices with less than 100ms time-to-first-byte, while TTS-2 Flash can reach 25ms. Developers can use voice cloning, voice design, 200+ languages, and advanced voice direction to create more engaging experiences.

Inworld also provides a Realtime API for full-duplex speech-to-speech conversations, tool calling, intelligent turn-taking, and dynamic context management. Their Realtime Router can route requests across 220+ LLM models from providers such as OpenAI, Anthropic, Google, and others.

For speech recognition, their Realtime STT supports live transcription, semantic voice activity detection, speaker diarization, word-level timestamps, custom vocabulary, and voice profiling. The platform also offers SOC 2 Type II, GDPR, and HIPAA compliance for teams building secure AI applications.

Inworld AI offers an On-Demand plan with no monthly subscription, including up to 70 minutes of TTS, 100 custom voices, voice cloning, and realtime API access. Paid plans start at $25/month for Creator, while Builder costs $100/month, Developer $300/month, and Growth $1,500/month.