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's Great
- 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)
What's Weak
- $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
The 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.
Frequently Asked Questions
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.