System Two Security, a cybersecurity startup built on an AI agent foundation that advances Detection Engineering, announced it raised $7 million in funding led by Costanoa Ventures, with participation from security-focused investor Runtime Ventures, as well as The Hive and Webb Investment Network. The round was also joined by individual investors including technology veterans Scott McNealy (former CEO of Sun Microsystems), Frederic Kerrest (CoFounder of Okta) and Ash Devata (CEO of GreyNoise), among others.