Marius Hobbhahn

CEO and co-founder of Apollo Research.

TIME100 AI 2025. Apollo works with frontier AI companies like OpenAI, Anthropic, GDM, and others to evaluate models before deployment and do joint research projects on scheming. Our evaluations are featured in the system cards of OpenAI o1, o3, GPT-5, GPT-5.5, Claude Opus 4, Claude Opus 4.5, and Claude Opus 4.6, among others.

We also build coding agent monitoring products. Watcher treats coding agents as untrusted endpoints. It applies MDM-style security to agent deployments: org-wide policy enforcement, real-time monitoring, and full observability for security and engineering leaders. Engineers get safer autonomy; security teams get visibility into what every agent is actually doing.

Previously: Research fellow at Epoch, forecasting the most important trends in AI. PhD in Bayesian ML (Max Planck Research School, Tübingen).