Grammarly

Overview Grammarly is the writing assistant that made grammar checking a habit — a background utility that has quietly been catching typos in your Gmail since 2015 and, in 2026, still runs the deepest grammar and style engine on the market. Founded in 2009 by Alex Shevchenko, Max Lytvyn, and Dmytro Lider, it grew from a browser extension for students into a full writing platform now used by more than 30 million daily active users and 70,000+ teams. What started as an underline the typo tool has become a suite that includes generative rewrites, tone detection, brand voice enforcement, plagiarism checking, AI writing assistance, and — since the acquisition of Coda AI in 2024 — a document first collaboration surface aiming squarely at Notion and Google Docs. What Grammarly actually does, cleanly stated, is read everything you type on a computer and offer suggestions. You install the browser extension, the native macOS or Windows app, or the Word and Docs add ins, and Grammarly runs on every text field — Gmail, LinkedIn, Slack, Twitter/X, Google Docs, Word, Notion, Outlook, WhatsApp Web, your CRM, your ticket system. Real time underlines flag grammar, spelling, punctuation, and style issues. Tone detection reads your draft and tells you what it currently sounds like. Full document rewrites — reworked on generative models in 2024 — handle "make this shorter," "rewrite for a technical audience," and "match our brand voice" without leaving the page. The one line positioning: Grammarly is the writing tool you do not…