Corelight, a Silicon Valley-based tech startup founded by the creators of the Zeek open-source framework, today announced it has raised $75 million in Series D investment to fuel the acceleration of its global market presence and development of new data and cloud offerings. Corelight was founded in 2013 by Robin Sommer, Seth Hall, Vern Paxson, Gregory Bell, and a team of cybersecurity veterans with roots in open source security. Since its inception eight years ago, Corelight has been providing security teams with network evidence so they can protect the world’s most critical organizations and companies. Today, Corelight is the fastest-growing NDR platform, serving defenders in some of the world’s largest financial institutions, retail and healthcare organizations, critical infrastructure providers, and government agencies. “This latest investment is a powerful affirmation not only of the network detection and response category, but also of our open-source heritage, data-centric approach, and commitment to customer success,” said Brian Dye, CEO of Corelight.