Joe Hewett

Joe Hewett is the Co-founder and Chief Technology Officer of Asteroid, an enterprise artificial intelligence software startup based in San Francisco, California. Founded in 2024 with a team of five employees, the company develops AI browser agents for back-office automation in regulated industries like healthcare, currently processing thousands of mission-critical executions daily. Asteroid participated in the Y Combinator Winter 2025 batch and Entrepreneur First, securing financial backing from prominent angel investors associated with OpenAI and Hugging Face. Previously, Hewett engineered fraud-detection infrastructure at the internet security firm Netcraft, where he designed the Scam Intelligence system and deployed automated agents that disrupted an estimated hundreds of millions of dollars in stolen funds annually. His technical background centers on building large language model systems and deploying scalable agentic infrastructure for complex enterprise operations and cybersecurity applications.