Grammarly is an AI-powered writing assistant that helps users communicate more effectively across platforms. Founded in 2009, it has evolved from a grammar checker into a comprehensive AI writing platform with GrammarlyGO, its generative AI engine. Grammarly provides real-time corrections for grammar, spelling, punctuation, and style, along with advanced features like tone detection, full-sentence rewrites, plagiarism detection, and AI-generated text drafts. The tool integrates seamlessly with over 500,000 apps and websites, including Google Docs, Microsoft Office, Gmail, Slack, and major web browsers. GrammarlyGO enables users to compose drafts, brainstorm ideas, and rewrite text with customizable tone and context settings. The platform serves over 30 million daily active users across individual, business, and enterprise segments, with dedicated solutions for education institutions. Enterprise features include SAML SSO, advanced analytics, style guides, brand tones, and centralized admin controls for team-wide writing consistency.