Pick Grammarly Free if…
you want typo, grammar and tone flags and rarely ask for AI rewrites.
Grammarly Free already fixes grammar and spelling in real time and flags tone. Pro is about rewriting rather than correcting — full-sentence rewrites and tone adjustment — plus plagiarism and AI-text detection.
Keep Free if you want correct spelling and grammar everywhere you type. Pay for Pro ($30/mo billed monthly, much less billed annually) if you need sentence rewrites, more AI prompts, or plagiarism checks.
| Grammarly Free | Grammarly Pro | |
|---|---|---|
| Price / month | Free | $30/mo |
| What you get |
|
|
| AI prompts/mo | 100 | 2,000 |
| Corrections | Real-time grammar & spelling, tone detector | Full-sentence AI rewrites & tone adjustment |
| Plagiarism & AI-text detection | Not listed | Included |
Monthly prices in US dollars before tax, from each vendor's official pricing (US list price; weekly-billed plans converted to a monthly figure). Updated November 2, 2026
you want typo, grammar and tone flags and rarely ask for AI rewrites.
you rewrite a lot of professional text, or need plagiarism and AI-text detection.
Grammarly Pro's monthly price is steep next to free chatbots that can also rewrite text. Its annual billing is far cheaper per month, so if you decide Pro is worth it, commit for the year.
Free costs nothing; Pro is $30/mo on monthly billing and considerably cheaper per month billed annually.
Full-sentence AI rewrites, tone adjustment, plagiarism and AI-text detection. Free also has 100 AI prompts a month against Pro's 2,000.
No. The Business tier was folded into Pro in 2025; organizations needing SSO and SCIM use Enterprise.
How we choose: prices come from each vendor's official pricing page and are re-checked every week. We take no affiliate fees, so rankings aren't for sale.