SONZAI ®
Sonzai LabsModel-agnostic character infrastructure

THE

CHARACTER

ENGINE

Model-agnostic infrastructure for AI characters with persistent memory, evolving personality, and proactive behavior. Bring your own LLM — deploy on mobile, game engines, messaging, or API.

Persistent MemoryProactive BehaviorEvolving Personality
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BELIEVABLE AI CHARACTERS AT SCALE

Model-agnostic infrastructure for AI characters that truly exist. Persistent memory. Proactive behavior. Evolving personality. Bring your own LLM — already powering Pocket Souls, now available for your product.

CORE CAPABILITIES

Developer infrastructure for AI characters with genuine depth. Six production-grade capabilities powering Pocket Souls — and ready for your product.

Persistent Memory

Unlimited recall

Unlimited recall across every session

Emotional Modeling

48 affect dimensions

Real-time affect across 48 dimensions

Adaptive Personality

Big Five + custom traits

Big Five traits shape every response

Proactive Behavior

Autonomous actions

Characters initiate, not just respond

Sub-200ms Retrieval

<200ms p95

Full context in under 200ms p95

7-Layer Context Engine

7 parallel layers

Seven parallel context layers per response

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PRODUCTS

CHARACTER ENGINE

MODEL-AGNOSTIC CHARACTER INFRASTRUCTURE

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THE CHARACTER ENGINE

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2025.01

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