AI writing assistant for error-free communication
by Grammarly, Inc. · Founded 2009
Grammarly is the world's most trusted AI writing assistant, checking grammar, spelling, clarity, and tone.
Grammarly is the most widely used AI writing tool in the world, with over 30 million daily active users across businesses, students, and professionals. Unlike AI content generators, Grammarly's core strength is in enhancing human writing — catching errors, improving clarity, adjusting tone, and ensuring consistency.
The platform has evolved significantly beyond simple spell-checking. Grammarly's AI now offers full-sentence rewrites, tone adjustments, and generative features for drafting emails, messages, and documents from scratch. Its real-time suggestions appear directly in Gmail, Google Docs, Microsoft Word, Slack, LinkedIn, and virtually every web-based text field via the browser extension.
For businesses, Grammarly Business provides style guides and brand tone settings that ensure every team member writes consistently — invaluable for customer-facing communications. The plagiarism checker (on Premium plans) scans against 16 billion web pages.
Grammarly is the one AI writing tool that nearly everyone should have, regardless of their primary writing tool. It acts as a safety net that catches what other tools miss.
| Feature | Grammarly |
|---|---|
| Free Plan | Yes — full grammar checkhighlight |
| Starting Price | $12/month |
| Works in Gmail/Docs/Word | Yes — everywherehighlight |
| Plagiarism Checker | Yes (Premium+)highlight |
| Tone Detection | Yes |
| Generative AI | Yes (Premium+) |
| Style Guides | Business plan only |
| Languages | English only |
| Browser Extension | Yes — Chrome, Firefox, Safari |
| Mobile App | Yes (iOS & Android) |
Every person on our 20-person marketing team uses Grammarly Business. The style guides ensure our brand voice is consistent across every email, social post, and blog article. It's caught embarrassing errors before they went live more times than I can count.
As a non-native English speaker writing my dissertation, Grammarly Premium has been invaluable. It catches subtle grammatical errors and suggests clearer phrasing. The plagiarism checker gives me peace of mind before submitting papers.
I use Grammarly as a final check on all my client work. It's excellent at catching typos and clarity issues. My only complaint is it sometimes flags intentional stylistic choices as errors. The ability to dismiss suggestions is there, but it gets repetitive.
Yes, Grammarly has a free plan that covers grammar, spelling, and punctuation checks. Premium ($12/mo) adds advanced suggestions, tone detection, plagiarism checking, and generative AI features.
Yes, Grammarly has a dedicated Microsoft Word add-in for Windows and Mac, as well as a browser extension that works in Google Docs, Gmail, and virtually every web-based text field.
Grammarly encrypts all data in transit and at rest. For Business plans, they offer enhanced data security options. However, if you're working with highly sensitive legal or medical documents, review their privacy policy carefully.
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