Grammarly AI is an AI-powered writing assistant focused on grammar correction, clarity, tone adjustment, rewriting, and productivity support across email, documents, browsers, and workplace tools.
Source coverage: standard. Reviewed 10–12 sources. Using the 5 strongest. Grammarly AI performs especially well for fast editing, sentence rewrites, tone suggestions, and everyday business writing. Its main strength is low-friction assistance that appears where people already write. In market terms, it is less of a deep research tool and more of a polished writing layer that improves correctness and readability at scale. The experience is strong for individuals and teams, though some of the best generative features sit behind paid plans.
