In-Depth Review
Grammarly has been the undisputed king of grammar checking for over a decade. As of 2026, it remains the most comprehensive writing assistant on the market—checking not just spelling and grammar, but also clarity, tone, fluency, and even plagiarism. If you write in English professionally, Grammarly Premium is almost a no-brainer.
The real magic of Grammarly is its ubiquity. It works everywhere you type: Gmail, Google Docs, LinkedIn, Slack, even your terminal. The browser extension is lightweight and rarely conflicts with other tools. The desktop app integrates with Word and offers a dedicated writing interface that's cleaner than Google Docs for long-form work.
But Grammarly's biggest strength is also its biggest weakness: privacy. Every keystroke you make in a Grammarly-enabled text field is sent to Grammarly's servers for processing. For most users, this trade-off is acceptable—the writing improvement is tangible. But if you work with sensitive documents (legal contracts, financial reports, medical records), you need to either disable Grammarly or use enterprise features with data-processing agreements.
Grammarly's AI writing features, introduced in 2024, are a mixed bag. The "Rewrite" function can genuinely improve awkward sentences, but the "Generative AI" mode tends to produce generic, corporate-speak text. If you need creative or nuanced writing, Claude or ChatGPT will serve you better. Grammarly is best for refining—not creating—content.
Pros
- Best-in-class grammar and spell checking
- Seamless browser and desktop integration
- Tone detection is genuinely useful for professional emails
Cons
- Privacy concerns—everything you type is sent to Grammarly servers
- Premium at $12/mo is steep for casual users
- AI writing suggestions can be generic and overly formal