Grammarly
The world's leading AI writing assistant — catches grammar errors, improves clarity, and rewrites for any tone.
The world's leading AI writing assistant — catches grammar errors, improves clarity, and rewrites for any tone.
Grammarly has evolved from a spell-checker into a full AI writing assistant used by 40 million people daily. It works across your browser, desktop apps, Google Docs, Microsoft Word, and email clients — making it the most integrated writing tool available.
The free tier catches basic grammar and spelling errors. Grammarly Premium ($12/mo billed annually) adds tone detection, clarity improvements, word choice suggestions, and the ability to set a writing goal for your audience. Grammarly Business ($15/user/mo) adds style guides, team analytics, and brand voice settings.
The AI rewriting feature (GrammarlyGO) can adjust tone — making text more formal, friendly, confident, or direct — and generates entire passages from a prompt. The plagiarism checker compares against 16 billion web pages. Grammarly’s unique strength is passive, always-on assistance: it improves your writing wherever you type without requiring you to open a separate app.
Pros: Works everywhere (browser, apps, email), passive always-on correction, excellent tone suggestions, trusted and mature product.
Cons: Premium required for advanced suggestions, AI rewrites can feel generic, some users find constant suggestions distracting.
Best for: Writers, students, professionals, non-native English speakers, and anyone who writes frequently across multiple platforms.