Redwood City, Calif.-based ThreatStream raised $4 million in Series A funding in February led by Google Ventures. The company’s SaaS-based platform, Optic, aggregates threat intelligence data to identify connections and give businesses visibility into how threats could impact them. It integrates its findings into an organization's existing security infrastructure, the company said. Founder and CEO Greg Martin is a network security expert and has a background in security information event management systems. The goal is to give security teams the ability to detect and respond to targeted attacks by providing accurate and actionable data based on real-time awareness. Other participating investors include the Paladin Capital Group, Hugh Njemanze, former CTO and founder of ArcSight and Tom Reilly, former CEO of ArcSight who currently is CEO of Cloudera, Apache Hadoop big data platform provider.