Inworld AI

What is Inworld AI?

Inworld AI is a voice AI platform that builds real-time conversational agents for games, applications, and interactive media, made by Inworld. The platform combines text-to-speech (TTS), speech-to-speech, speech-to-text, and large language model routing into a unified system designed for sub-250 millisecond latency interactions that feel natural and responsive.

The platform's core offering includes Realtime TTS-2, ranked #1 by real users on the Artificial Analysis Speech Arena. It delivers first-chunk latency under 130ms for the Mini model and under 250ms P90 for Max and Realtime TTS-2 variants. Pricing starts at $15 per million characters, positioning it up to 80% cheaper than comparable providers. The system supports advanced voice direction through bracketed instructions in text, enabling tone, speed, volume, and vocal style adjustments on the fly. Voice cloning functionality generates custom voices from 15 seconds of audio and localizes them across 15 languages while maintaining identity and accent consistency. Text-based voice design allows developers to describe voices in natural language—specifying accent, age, tone, and energy—without recording.

Inworld handles speech-to-speech conversations with full-duplex, low-latency streaming over WebSocket or WebRTC connections, implementing intelligent turn-taking with context-aware detection. The platform supports over 100 languages with cross-lingual deployment capabilities, eliminating the need for separate regional pipelines. Tool calling and custom reasoning enable the AI to understand context and interact intelligently within game narratives or application workflows.

The freemium model includes free tier access for developers, with paid plans scaling based on character processing volume and real-time conversation minutes. Customers shipping at scale include game studios, language learning platforms, healthcare applications, and interactive media companies. Notable integrations include partnerships w