Is Grammarly free? Free vs Pro in plain English
Yes. Grammarly's free plan costs $0 and catches spelling and grammar mistakes, shows your writing tone, and gives you 100 AI writing prompts a month. Grammarly Pro is listed at $12 a month and adds full-sentence rewrites, tone changes and 2,000 prompts a month.
Prices checked Oct 2026.
What the free plan does
Grammarly checks your writing as you type in email, documents and websites, and underlines mistakes. On Free, its plans page lists: writing without spelling and grammar mistakes, seeing your writing tone, and 100 AI prompts a month for drafting or rewriting.
For most people writing emails and messages, that's the main thing you want: a second pair of eyes before you hit send.
What Pro adds
Pro is listed at $12 a month (USD). It adds one-click full-sentence rewrites, tone adjustments, help writing fluently in English, plagiarism and AI-text detection, and 2,000 AI prompts a month.
Grammarly offers a Pro trial for $0 today and says it emails you 2 days before the trial ends, so set a reminder if you don't want to be charged.
Do you need Pro?
Not to start. Free covers spelling and grammar, which is what most beginners need. If you want a whole email rewritten in a friendlier or firmer tone, a free chat tool like ChatGPT or Claude can do that too. See Best AI for writing emails.
The first thing to type
Rewrite this so it sounds polite but firm, and keep it short: [paste your message]Common questions
Is Grammarly really free?
Yes. The Free plan is $0 and covers spelling and grammar checks, tone detection and 100 AI prompts a month.
How much is Grammarly Pro?
Grammarly's plans page lists Pro at $12 a month in USD.
Does Grammarly free have AI?
Yes. Free includes 100 AI prompts a month. Pro raises that to 2,000.
Is there a Grammarly free trial?
Yes. Grammarly offers a Pro trial with $0 due today and emails a reminder 2 days before it ends.
Sources (checked 2026-10-20): www.grammarly.com/plans