Grammarly is an AI assistant centered on English writing for individuals, students, educational institutions, and workplace teams. It checks grammar, spelling, punctuation, structure, and clarity, offers paragraph rewrites and tone guidance, and can generate draft text for email, documents, and other routine communication.
The service is available through Grammarly Docs, desktop and mobile applications, and browser extensions that surface suggestions inside supported sites or apps. It requires the relevant account or installed access point, and availability differs by plan for capabilities such as full-sentence rewriting, brand controls, and some AI features.