GreatHorn delivers cloud-native email security for Microsoft 365 and Google Workspace using machine learning and data science. It detects and mitigates phishing attacks before delivery with pre-analysis and automated remediation. The platform provides real-time user warnings and automated response tools to reduce account takeovers and malicious link clicks. It is recognized as a Gartner Cool Vendor and has a 4.8-star rating in Gartner Peer Insights.