GreatHorn is a computer software company that provides protection for cloud email systems, via advanced threat detection, automated defense, and integrated incident response. The company specializes in the fields of machine learning, information security, predictive security, and cybersecurity. GreatHorn was founded in 2015 and headquartered in Waltham, Massachusetts.

Waltham, MA, USA

Belmont Country Club, Broad Run, VA, USA

Belmont, VA, USA

Belmont, MA, USA

GreatHorn

enterprise

security

At RRE, we are committed to helping founders build category-defining companies in industries ranging from financial services (OnDeck, Avant, Venmo) to 3D printing (Makerbot), and from media (BuzzFeed, Business Insider, TheSkimm) to space and robotics (Jibo, Spaceflight, Spire). We invest primarily in Seed, Series A, and Series B rounds, and we take pride in being active strategic and operational - as well as financial - partners. Our unparalleled network of relationships across multiple industries and countries allows us to help the companies we invest in with strategy, business development, marketing, recruiting, and much more. Simply put, we think of ourselves as being far more than just a source of capital for companies.

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