Disclosure: This post contains affiliate links. I may earn a commission if you click through and subscribe, at no extra cost to you.
Grammarly Premium is one of the most-used writing tools on the planet. But is upgrading from the free version actually worth it for professional writers? After years of using both, here’s my honest assessment.
What Grammarly Premium Adds Over Free
The free version catches basic grammar errors, spelling mistakes, and punctuation issues. It’s genuinely useful and I recommend it to anyone who isn’t using it yet.
Premium adds:
- Clarity suggestions — flags sentences that are grammatically correct but hard to read, and suggests clearer alternatives
- Engagement suggestions — identifies repetitive word use and dull sentence structure
- Delivery suggestions — tone analysis to flag text that may read as rude, uncertain, or overly formal
- Plagiarism detection — checks against 16 billion web pages (useful for content writers delivering to clients)
- Full-sentence rewrites — not just corrections but complete rewrite suggestions for awkward passages
- Vocabulary enhancement — suggests more precise or varied word choices
- Consistency checker — flags inconsistent spelling (e.g., “e-mail” vs “email” within the same document)
Grammarly Premium Pricing (2026)
- Monthly: $30/month
- Quarterly: $20/month (billed quarterly)
- Annual: $12/month (billed annually)
At $12/month annual, it’s reasonable for professional writers. At $30/month on the monthly plan, it’s harder to justify unless you’re using it daily for client work.
What It’s Actually Good At
Clarity Rewrites
This is Premium’s best feature. When you write a sentence like “The reason for the fact that the results were disappointing was due to the failure to adequately communicate,” Grammarly flags it and suggests “The results were disappointing because of poor communication.” That kind of editing — taking your meaning and expressing it more clearly — is where Premium genuinely earns its keep.
Plagiarism Detection
For content writers delivering work to clients, the plagiarism checker is a useful professional safeguard. It won’t catch everything, but it flags obvious matches and gives you confidence that your AI-assisted drafts aren’t inadvertently duplicating published content.
Tone Detector
The tone analysis is more useful than it sounds. Client emails, particularly those containing bad news or pushback, benefit from a tone check. The detector has saved me from sending messages that read as more aggressive than intended.
Where Grammarly Premium Falls Short
It Homogenizes Writing Style
This is the biggest criticism from serious writers: Grammarly pushes everything toward the same clear, direct, corporate register. If you have a distinctive voice — fragments for emphasis, unconventional punctuation choices, deliberate run-ons — Grammarly will flag all of it. You’ll spend time dismissing suggestions rather than improving your writing.
For that reason, ProWritingAid is often the better choice for writers who have a developed style they want to maintain and refine rather than flatten.
Misses Deeper Structural Issues
Grammarly operates at the sentence level. It won’t tell you that your argument is structured backwards, that you’ve buried the lede, or that your article’s second section contradicts its first. For developmental editing issues, you still need a human editor or a tool like Hemingway Editor for readability analysis.
Grammarly Premium vs ProWritingAid
| Feature | Grammarly Premium | ProWritingAid |
|---|---|---|
| Grammar/spelling | ✅ Excellent | ✅ Excellent |
| Style suggestions | ✅ Strong | ✅ More detailed |
| Plagiarism checker | ✅ Yes | ✅ Yes (higher tiers) |
| Writing reports | Basic | ✅ 25+ report types |
| Fiction-friendly | Mediocre | ✅ Better |
| Browser extension | ✅ Excellent | Good |
| Price | $12/month annual | $10/month annual |
Who Should Pay for Grammarly Premium?
Worth it for: Business writers, content marketers, email-heavy professionals, anyone delivering client work who values the plagiarism checker, writers who work primarily in browsers (Grammarly’s browser extension is excellent).
Consider ProWritingAid instead: Fiction writers, writers with a developed personal style, anyone who wants deeper analytical reports on their writing patterns.
Final Verdict: 3.5/5
Grammarly Premium is good but not exceptional. The free version covers most grammar and spelling needs. Premium’s clarity suggestions and plagiarism checker are genuinely useful additions for professional writers — but at $30/month, the monthly price is hard to justify. At $12/month annual, it’s a reasonable productivity tool for anyone writing daily in a professional context.
→ Try Grammarly Premium free for 7 days — worth testing before committing.