Grammarly is the most widely used writing assistant in the world, with over 30 million daily users. The free version catches grammar, spelling, and basic punctuation errors in real time as you type — in emails, Google Docs, social media, and anywhere else you write online. Grammarly Premium ($30/month or $144/year) adds advanced suggestions for style, tone, word choice, conciseness, and plagiarism detection.
Free vs. Premium: What Is the Actual Difference?
| Grammar and spelling | Both free and premium |
| Style suggestions | Premium only |
| Tone detection | Basic (free) / Advanced (premium) |
| Word choice improvements | Premium only |
| Conciseness suggestions | Premium only |
| Plagiarism detection | Premium only |
| GrammarlyGO (AI writing) | Limited (free) / Full access (premium) |
Who Should Upgrade to Premium?
Grammarly Premium is worth it if you write professionally and your writing quality directly affects your income or reputation. The style and conciseness suggestions genuinely improve the quality of business writing — they catch the kind of wordiness and passive voice that makes emails feel unclear. The plagiarism checker is essential for anyone producing content that needs to be original.
For casual personal use — emails to friends, social media posts — the free version is more than sufficient. Grammarly's free tier has improved significantly and catches the errors that matter most.
Grammarly Premium is worth the upgrade for professional writers, content marketers, and anyone who writes extensively for work. The annual plan at $144/year ($12/month) makes the price much more reasonable than the $30/month rate. Start with the free version — if you find yourself wishing for more suggestions, the upgrade is worth it.
Written by the StackMyReferrals Editorial Team. We review products independently and only recommend products we believe are genuinely useful. When you sign up through our links, we may earn a referral bonus — this never affects our editorial opinion.