Grammarly

Grammarly is an AI-powered writing assistant that checks grammar, spelling, and punctuation while also suggesting improvements to tone, clarity, and delivery. Beyond basic proofreading, it offers paragraph rewriting, a plagiarism checker, an AI-generated-content detector, citation generation, and a paraphrasing tool, plus an AI chat feature and a resume builder. Teams can set a shared style guide so suggestions stay consistent with brand voice. The assistant works across more than a million apps and websites through browser extensions for Chrome, Safari, Firefox, and Edge, desktop apps for Windows and Mac, mobile apps for iPhone, iPad, and Android, and a standalone web editor called Grammarly Docs. It integrates directly with tools such as Microsoft Office, Google Docs, Gmail, and Slack, so writers get suggestions inline rather than switching to a separate app. The company reports serving roughly 40 million people and 50,000 organizations, including enterprise customers like Zoom, Databricks, and Atlassian. Grammarly suits anyone who writes across many surfaces daily — students, professionals, and teams — more than someone who only needs a single-document check. Free, Premium, and Business plans carry different monthly limits on AI-generated suggestions, so heavy users of the generative features may hit those caps well before they'd need a human proofreader.