Grammarly AI Writer

Grammarly has evolved from a grammar checker into a comprehensive AI writing assistant. The AI Writer feature, expanded significantly in 2026, generates text from prompts, rewrites existing content, adjusts tone (formal, casual, friendly, assertive), and ensures brand voice consistency. It works everywhere you write: Gmail, Google Docs, Slack, LinkedIn, Word, and 500,000+ websites via browser extension. GrammarlyGO (the AI assistant) can compose full emails, summarize threads, reply to messages, and generate ideas. For enterprise teams, Grammarly ensures every piece of written communication matches brand guidelines with customizable style guides, terminology databases, and tone profiles. With 30+ million daily users, it is the most widely adopted AI writing tool.