Grammarly AI

Grammarly is the world's most widely used AI writing assistant, providing real-time grammar, spelling, punctuation, clarity, tone, and style feedback across virtually every platform where people write digitally. With over 30 million daily active users, Grammarly has established itself as a ubiquitous layer of writing assistance across professional and personal communication.

Grammarly's core grammar and spelling correction goes significantly beyond basic proofreading. The AI identifies complex issues including subject-verb agreement, incorrect comma usage, misplaced modifiers, wordiness, passive voice overuse, and register inconsistencies — with explanations that help users understand the underlying writing principle, not just accept a correction.

The Tone Detector analyzes the emotional quality of written content — identifying whether text sounds confident, friendly, formal, uncertain, or accusatory — and suggests adjustments to match the intended communicative register. This tone awareness is particularly valuable for professional communication where misread tone can damage relationships.

Grammarly's generative AI features, branded as Grammarly GO, extend beyond correction to active content generation. Users can draft emails, generate content outlines, rewrite paragraphs, and create responses from brief descriptions. The AI adapts to individual writing style over time through a personal style profile. Grammarly Business provides team-level style guides, brand tone consistency enforcement, and analytics for enterprise organizations.