The short answer: Grammarly Premium is worth $30/mo if you write professionally every day. After 30 days of testing, its grammar, punctuation, and tone detection are best-in-class, and Premium adds tone, consistency, and plagiarism checks. For occasional editing, the free version or Claude is enough — Premium is an editor, not a content generator.
What's the short answer?
Grammarly Premium is excellent at grammar, punctuation, and tone consistency. For $30/mo, it's worth it if you write professionally every day. For occasional editing, the free version (or Claude) is enough.
What does Grammarly Premium do well?
- Grammar & punctuation accuracy — genuinely excellent
- Tone detection — catches harsh or passive language
- Consistency — style, spelling, and punctuation uniformity
- Works everywhere — browser extension, desktop, mobile
- Plagiarism checker (Premium)
Where does Grammarly Premium fall short?
- $30/mo is steep — 4x the price of Rytr ($7.50)
- Premium suggestions can be wrong on nuanced writing
- Not a content generator — it's an editor, not a writer
- Over-edits creative/fiction writing
| Feature | Free | Premium ($30/mo) |
|---|---|---|
| Grammar & punctuation | ✓ | ✓ |
| Works everywhere (browser, desktop, mobile) | ✓ | ✓ |
| Tone detection | ✗ | ✓ |
| Consistency (style, spelling, punctuation) | ✗ | ✓ |
| Plagiarism checker | ✗ | ✓ |
| Content generation | ✗ | ✗ |
What's our verdict?
For professional writers, marketers, and students who write daily, Grammarly Premium pays for itself. For casual users, the free version is genuinely useful, and Claude can do the heavy editing for free.
What do people ask about Grammarly Premium?
Is Grammarly Premium worth $30/mo?
Yes, if you write professionally every day. For occasional editing, the free version or Claude is enough.
How accurate is Grammarly Premium?
Very accurate for grammar and punctuation — the best in its class. Premium suggestions can occasionally be wrong on nuanced or creative writing.
Is Grammarly free enough?
For basic grammar and spelling, yes. Premium adds tone, consistency, and plagiarism checks.
Is Grammarly a content generator?
No — Grammarly is an editor. For writing content, pair it with an AI writer like ChatGPT, Claude, or Rytr.