Intelligent Tools for
Modern Development.

We build foundational AI systems that empower developers and accelerate innovation.

ThirdKey is a new kind of AI company. We don’t just build models — we shape the future of software creation. Our intelligent, autonomous tools transform development processes, enabling teams to tackle complex challenges with unprecedented speed and precision.

Symbiont

Symbiont is an AI-native agent framework for building autonomous, policy-aware agents that can safely collaborate with humans, other agents, and large language models.

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SchemaPin 🧷

A simple, open-source security standard for signing and verifying AI agent tool schemas. Prevent malicious tampering and secure your MCP servers.

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MockLoop

Generate realistic mock data and APIs for seamless testing and development workflows.

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Mission & Research

Our mission is to augment human ingenuity through intelligent tools and AI. We are exploring the frontiers of artificial intelligence, from foundational models and reinforcement learning to applied AI safety.