Inworld

Inworld is a developer platform for building AI-driven characters and NPCs with personalities, memory, emotions, and real-time voice, designed for games, interactive media, and virtual experiences. It provides tools and SDKs so studios can drop these characters into engines like Unity and Unreal and control their behavior at scale. Inworld is an AI character engine that lets you define character brains (personality, goals, backstory), plug them into runtime orchestration (context, safety, narrative control), and deliver multimodal interactions (text, voice, gestures) inside real-time apps.
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Core features
Character Engine that models personality, emotions, memory, goals, and safety rules beyond a basic LLM chat.
Runtime platform to orchestrate dialogue, actions, and context across many characters in real time.
​Narrative Graph tools to design branching, reactive storylines and character arcs, co-developed with partners like Microsoft.
​Multimodal stack combining NLU/NLG, TTS, ASR, emotion, gesture, and animation controls.
​High-concurrency infrastructure tuned for low-latency, real-time experiences with many simultaneous players.
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Key tools it offers
Inworld Studio: no-code browser tool to author characters, worlds, and narratives via natural-language descriptions and sliders.
Inworld Engine / Runtime: AI orchestration layer that plugs into game logic and drives NPC behavior and game states.
​SDKs and templates for Unity, Unreal, and other engines (character templates, blueprints, graphs).
​Inworld Core: enterprise infrastructure options with custom models, on-device or dedicated GPU deployment, and adaptive serving.
​TTS & voice cloning API with sub-second latency, emotional control, multilingual voices, and per-character voices.
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Benefits for users
For game studios & XR creators: Replace scripted NPCs with dynamic characters that remember players, react to worlds, and drive emergent gameplay.
​For media & interactive experiences: Build virtual hosts, companions, and performers that stay on-brand and in-world.
For enterprises & tools: Add rich AI agents to support, training sims, and digital workforces without building an entire stack from scratch.