Inworld AI
Realtime AI model and infrastructure platform offering the #1-ranked voice AI (TTS), intelligent model routing, and an Agent Runtime for building and deploying interactive AI applications at scale.
Overview
Inworld AI is a realtime AI model and infrastructure company, and the leading consumer AI infrastructure platform. Founded by the team that led product for LLMs at DeepMind and built Dialogflow (acquired by Google), Inworld has raised $125M+ from Lightspeed, Kleiner Perkins, Founders Fund, and others. The platform solves the core infrastructure problem that prevents AI applications from reaching scale: the gap between prototype and production.
The vertically-integrated stack includes Inworld TTS, the #1-ranked realtime voice AI on the Artificial Analysis TTS Arena, and Inworld Agent Runtime, an orchestration layer purpose-built for interactive AI applications at millions of concurrent users. Together they power apps like Status by Wishroll (3rd fastest app to 1M DAUs), Bible Chat (~800K DAUs), and Talkpal (5M language learners), as well as Fortune 500 brands like NVIDIA, NBCU, and Logitech Streamlabs.
Key features
- Inworld TTS-1.5: #1-ranked realtime voice AI with sub-200ms latency and native quality in 15+ languages
- Voice cloning from seconds of reference audio with real-time emotion control, pace adjustment, and lipsync timestamps
- Agent Runtime with C++ core for low-latency execution at thousands of QPS, free with pay-per-use model consumption
- Model-agnostic integration of 220+ models from OpenAI, Anthropic, Google, Mistral, and more through a single API
- Intelligent routing based on cost, latency, and business metrics like retention and engagement
- Built-in telemetry and A/B experimentation on live traffic without redeploying code
- Multi-step workflows, tool calling, and structured outputs for sophisticated conversational agents
- Enterprise options including on-premise deployment, HIPAA/BAA, data residency, and zero data retention
Best for
- Build companion apps with emotionally engaging voice interaction that scale to millions of daily users
- Power developer assistants with natural conversation for coding help, debugging, and automation
- Deploy enterprise voice agents for customer support, sales automation, recruiting, and internal knowledge Q&A
- Create personalized learning experiences for language learning, tutoring, and professional training
- Deliver health and wellness coaching through conversational interaction at scale
- Bring interactive media to life with AI-powered characters across games, IP experiences, and entertainment
- Reduce TTS costs by up to 95% while maintaining or improving voice quality and user engagement
- Run experiments across models, prompts, and pipelines to optimize retention and conversion
Capabilities
Realtime voice generation
Add natural-sounding speech to your app in 15+ languages with sub-200ms latency, voice cloning from seconds of audio, and real-time emotion and pace control.
Agent Runtime
Deploy production-grade conversational agents via a simple API with C++ core for low-latency execution at thousands of QPS, model-agnostic across OpenAI, Anthropic, Google, and more.
Intelligent routing and optimization
Smart model routing based on cost, latency, and business outcomes like retention and engagement through a single unified interface.
Observability and experimentation
Built-in telemetry, A/B testing of models, prompts, and pipelines on live traffic to measure impact on retention, engagement, and conversion without redeploying.
Frequently Asked Questions
How much does Inworld TTS cost?
TTS-1.5-Mini is $5 per million characters and TTS-1.5-Max is $10 per million characters, delivering 20x cost savings compared to alternatives like ElevenLabs or Hume AI.
Is the Agent Runtime free?
Yes, Agent Runtime is free to use. You only pay for model consumption from connected providers like OpenAI, Anthropic, or Google.
Which LLM providers does Agent Runtime support?
It is model-agnostic with 220+ models from OpenAI, Anthropic, Google, Mistral, Meta, and open source providers through a single unified interface with no markup.
What languages does Inworld TTS support?
15+ languages including English, Spanish, French, German, Korean, Chinese, Japanese, Arabic, Hindi, Hebrew, Portuguese, Italian, Dutch, Polish, and Russian at native-speaker quality.
Can I deploy on-premise?
Yes, the Enterprise plan supports on-premise deployment, VPC, HIPAA/BAA compliance, EU and India data residency, and zero data retention mode.
