The short answer: Grammarly Premium is worth it for two groups: non-native English speakers writing professional emails, and anyone whose writing is judged by outsiders (job applicants, freelancers). For everyone else — especially creative writers — the free tier plus Claude or ChatGPT does the job better. Our full breakdown is in the Grammarly Premium review.
What Premium actually adds
We ran Grammarly Premium daily for 30 days. The free tier catches spelling, punctuation, and basic grammar. Premium adds: tone detection, formality suggestions, clarity rewrites, and a vocabulary boost. That's the honest feature list — the question is whether those additions move the needle for your writing.
Who it's genuinely worth it for
Three groups came out clearly in testing:
- Non-native speakers writing to native audiences. The tone and formality suggestions caught phrasing patterns that grammar checkers miss. This was the strongest use case by far. See our non-native-speaker guide.
- Job applicants. A polished cover letter or resume is directly judged by a recruiter. Premium's clarity rewrites helped. We cover the resume angle in ChatGPT for resumes.
- Freelancers emailing clients. Same logic as job applicants — your writing is your product's packaging.
Who should NOT pay
Equally clear in testing:
- Creative writers. Premium pushes toward generic, safe phrasing — the opposite of distinctive prose. Claude or ChatGPT gives better stylistic feedback.
- People who mostly write short social posts. The free tier catches what matters.
- Anyone on a tight budget who already uses ChatGPT or Claude. Those models write better than Premium suggests and rewrite in context, which a grammar tool can't.
Free vs Premium, measured
In our 30-day test, Premium caught roughly 15% more issues than the free tier on professional emails — but almost all of the extra catches were tone and style suggestions, not errors. On clear grammar, the free tier caught the vast majority. That's the honest data: you're paying mostly for tone guidance, not correctness.
How it compares to AI writing tools
This is the key comparison. Grammarly is a checker; Claude and ChatGPT are writers. For editing a draft, the AI models do everything Premium does and more — explain the fix, rewrite the sentence, adjust tone — at no extra cost if you already subscribe. Rytr at $7.50 even includes a free grammar pass on its output. The comparison in Rytr vs Grammarly lays this out.
The verdict
Keep the free tier if you write internal or casual content. Pay the ~$12/month if your writing is externally judged — emails to clients, job applications, published content from a non-native perspective. For everyone else, your money goes further on Claude or ChatGPT, which write and edit in one tool.
Frequently Asked Questions
How much does Grammarly Premium cost?
Roughly $12/month (cheaper on annual plans). The free tier covers spelling, punctuation, and basic grammar with no time limit. Our full pricing and feature breakdown is in the Grammarly Premium review.
Is Grammarly Premium worth it for non-native English speakers?
Yes — this was the strongest use case in our 30-day test. The tone and formality suggestions catch phrasing patterns that basic grammar checkers miss, which is especially valuable in professional emails.
Is Grammarly better than ChatGPT or Claude for editing?
For explaining and rewriting sentences, no — ChatGPT and Claude are stronger because they edit in context and explain their changes. Grammarly wins on convenience (works everywhere you type) and on instant grammar flags.
Can I use AI writing tools instead of Grammarly?
Largely, yes. If you already subscribe to Claude or ChatGPT, they cover grammar, style, and rewriting. Rytr even includes a grammar pass. Grammarly's edge is universal in-browser convenience, not superior editing.