Abnormal Security vs AiPrise
Side-by-side comparison of AI visibility scores, market position, and capabilities
San Francisco AI email security (private, $5.1B valuation); $250M Series D (Wellington Management), behavioral AI detects novel BEC/phishing in Microsoft 365/Google Workspace competing with Proofpoint and Microsoft Defender.
About
Abnormal Security is a San Francisco, California-based AI-native cloud email security company — founded in 2018 by Evan Reiser (CEO) and Sanjay Jha (CTO), both former Google engineers — using behavioral AI to detect and block business email compromise (BEC), phishing, ransomware, account takeovers, and AI-generated social engineering attacks against enterprise email environments (Microsoft 365, Google Workspace) through approximately 600 employees. The company raised a $250 million Series D funding round at a $5.1 billion valuation, led by Wellington Management with participation from existing investors Greylock Partners, Menlo Ventures, Insight Partners, and the CrowdStrike Falcon Fund — bringing Abnormal's total funding to approximately $580 million. Abnormal Security's approach to email security is fundamentally different from traditional signature and rule-based approaches: rather than scanning emails for known malware hashes or suspicious links against threat databases, Abnormal's AI models each employee's historical communication behavior (who they email, how they write, what times they send messages, what financial requests they make) and flags deviations from established baselines as anomalies requiring investigation — enabling detection of novel BEC attacks that have no prior signature, AI-generated phishing that passes link reputation checks, and vendor invoice fraud that impersonates legitimate suppliers.
Global KYC/KYB platform reducing verification from weeks to minutes across 80+ registries in 150+ countries; $12.5M Series A from Headline, YC S22-backed serving Bridge (Stripe) and Meta at $5.9M ARR.
About
AiPrise is a San Francisco-based global compliance platform that automates KYC (Know Your Customer) and KYB (Know Your Business) verification processes for enterprises operating across multiple countries — combining data from 80+ local registries and government databases with AI-powered verification agents that reduce identity verification workflows from weeks to minutes across 150+ countries. A Y Combinator Summer 2022 graduate, AiPrise raised a $12.5 million Series A in October 2025 led by Headline, achieved $5.9 million ARR by June 2024, and serves 150+ global customers including Bridge (Stripe), Meta, and Nium with a 40-person team.
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