Grammarly (grammarly.com) is an AI-powered writing assistant used by over 40 million people and 50,000 organizations worldwide. It works across browsers, desktop apps, Microsoft Word, Google Docs, Outlook, Slack, and 1 million+ other surfaces to deliver real-time grammar, spelling, tone, clarity, and style suggestions. The Pro plan adds full-sentence rewrites, plagiarism detection, generative AI prompts, and brand voice customization.
How Grammarly Works
Grammarly installs as a browser extension, desktop app, or IDE plugin and runs in the background as you write. It flags grammar and spelling errors, suggests tone improvements, and offers full-sentence rewrites to improve clarity. The generative AI feature (2,000 monthly prompts on Pro) can draft text from scratch, rewrite sections, or summarize content based on your instructions and writing style. Enterprise teams can configure custom style guides and brand tones that apply across the entire organization.
Key Features
- Real-time grammar & spelling — catches errors across all writing surfaces instantly
- Full-sentence rewrites — suggests alternative phrasing for clarity and conciseness (Pro)
- Tone detection — identifies how your writing sounds and suggests adjustments
- Plagiarism detection — checks content against a vast online database (Pro)
- Generative AI — 2,000 monthly AI writing prompts to draft, rewrite, or summarize text (Pro)
- Brand voice & style guide — organization-wide writing standards enforced automatically (Enterprise)
- 1 million+ integrations — works in Chrome, Firefox, Word, Docs, Outlook, Slack, and more
- Grammarly Docs — built-in AI-powered writing surface for full document creation and editing
Grammarly Pricing
- Free — $0/month — basic grammar and spelling checks, 100 AI prompts/month, tone detection across all devices.
- Pro — $12/member/month (billed annually, $30/month billed monthly) — full-sentence rewrites, plagiarism detection, 2,000 AI prompts/month, tone suggestions, brand voice, and team features.
- Enterprise — Custom pricing — unlimited AI prompts, advanced security, admin controls, custom style guides, analytics, and dedicated support.
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Who Should Use Grammarly?
Grammarly suits anyone who writes regularly in a professional or academic context — from students and bloggers to marketing teams and enterprise communicators. The free tier is strong enough for basic error-checking. Pro is the right upgrade for professionals who need rewrites, plagiarism checking, and AI generation. Enterprise is best for organizations that need consistent brand voice and centralized writing governance across large teams.
