Alastair Paterson

Alastair Paterson is the co-founder and CEO of Harmonic Security, a San Francisco-based startup building language models that protect enterprise data as employees pour it into generative AI tools. He previously co-founded Digital Shadows in a London kitchen in 2011 and ran it for eleven years through to its $160M acquisition by ReliaQuest in 2022. A Bristol-trained engineer who cut his teeth at BAE Systems Detica, he is now back on his second cybersecurity company, this one wagering that coaching beats blocking.