Abnormal Security Raises $50M in Series B Funding Led by Menlo Ventures to Accelerate Enterprise Adoption of Leading AI-driven Email Security Platform Significant Investment Comes Amidst 3x Increase in Fortune 500 Customer Base During 2020; Company Doubling Down on AI-based Threat Detection Engine and Scaling Enterprise Support SAN FRANCISCO, November 18, 2020-- Abnormal Security, a next-generation email security company, today announced that it raised $50 million in Series B venture capital funding. Led by Menlo Ventures, with participation from early investor Greylock, the round brings Abnormal’s total funding to $75 million.