Citadel AI

Citadel AI is a Tokyo-based software company that builds products to test, monitor, and govern high-risk AI systems. Its flagship product, Citadel Lens, is a unified platform enabling engineering and compliance teams to evaluate LLMs, computer vision, and tabular AI models — providing out-of-the-box jailbreak testing for generative AI, ISO-compliant reports for predictive AI, and real-time monitoring across the full AI development lifecycle. Citadel AI also offers LangCheck, an open-source library for multilingual LLM evaluation. The company serves regulated industries including healthcare, manufacturing, financial services, and automotive, and has partnered with BSI (British Standards Institution) for AI certification. Citadel AI is a Certified AI Assurance Resource Provider in Singapore's Global AI Assurance Sandbox and the Coalition for Health AI (CHAI). Founded December 10, 2020 by co-founders Hironori 'Rick' Kobayashi (CEO) and Kenny Song (CTO), the company operates from Shibuya/Bunkyo, Tokyo, and has approximately 11–50 employees.