5 Patents | 9,500+ API Endpoints | 18 Native DLLs | The AI-Native Spatial Game Engine — Now in Early Access

RakuAI vs Unity vs Unreal — for smart glasses and AI-native experiences.

Three engines. Different design constraints. Different categories. Here’s the honest comparison.

Where AI lives in each engine: Unity and Unreal place AI at design time in the editor, while RakuAI places AI in the runtime, driving the simulation every frame. DESIGN TIME RUNTIME Unity / Unreal editor · build pipeline AI as editor feature scene authored once ship static build RakuAI Runtime simulation step, every frame AI as runtime primitive intent streamed live live loop
The category difference in one picture: AI authored at design time vs. AI driving the runtime every frame.

Headline comparison

Capability RakuAI Unity Unreal
MCP support Six tools, runtime, every frame (since March 2026) Just released: scene manipulation, design time Not yet
AI role Runtime primitive (every frame) Editor feature (design time) Plugin / addon
Smart-glasses optimization Built for it (5 patents from 2012) General-purpose Console/VR-first
Motion-to-photon target 18 ms Varies (60 FPS-focused) 90+ FPS in VR
Dual-device architecture Native (phone-as-compute, glasses-as-display) Add-on Not designed for this
Thermal envelope awareness Native (3 modes, dynamic quality fallback) Manual Manual
On-device SLM (TFLite) Native Plugin Plugin
World-model adapters First-class (Veo, Runway, custom) Not supported Not supported
Multi-LLM by default Yes (Claude/ChatGPT/Gemini/Copilot) Editor only Editor only
OpenXR conformance Yes Yes Yes
Patent estate (smart glasses) 5 granted patents (priority 2012) None None
SDK languages 6 (C#, C++, Python, TypeScript, Swift, Java) C# C++/Blueprint
License model Partner-friendly Per-seat, runtime royalties at scale Per-seat + royalties

The honest take

Where Unity wins right now

  • Massive asset store ecosystem
  • Mature 2D and mobile game tooling
  • Larger developer community
  • Native MCP for design-time scene manipulation (just shipped, real win)

Where Unreal wins right now

  • Best-in-class VR and console graphics
  • Nanite + Lumen rendering for high-fidelity scenes
  • Strong cinematic tooling
  • Mature multiplayer netcode

Where RakuAI is the only choice

  • Glasses-thermal-envelope-aware runtime
  • World-model orchestration (every-frame LLM intent)
  • Dual-device patent-protected architecture
  • Multi-LLM by default (not bolted on)
  • AI as runtime primitive, not editor feature

When to pick which

Pick Unity if Shipping a mobile or PC game, want maximum asset ecosystem, design-time AI assist is enough.
Pick Unreal if Building a VR game on high-end hardware, prioritize photorealistic graphics, can afford the engine cost.
Pick RakuAI if Shipping for smart glasses, want AI as a runtime primitive (not a feature), need world-model orchestration, building for the AI-native era.

The category we’re creating

“We’re not trying to beat Unity at being Unity, or Unreal at being Unreal. We’re building the engine category that doesn’t exist yet: the smart-glasses-native AI runtime.

The smart-glasses category needs a runtime that was designed for it. Unity and Unreal weren’t. We were.”

Drive your AI → For smart-glasses partners → For LLM labs →