Grammarly Review: A Closer Look at Its AI Writing Features and Plans
Quick verdict: Grammarly remains one of the most convenient writing assistants because it works almost everywhere you type. The free plan covers spelling and grammar well; Pro is worth it if you write a lot at work and want full-sentence rewrites, tone adjustments and a much higher AI prompt allowance.
What is Grammarly?
Grammarly is an AI-powered writing assistant that checks spelling, grammar, clarity and tone, and can generate or rewrite text on request. It runs as a browser extension, desktop app and mobile keyboard, so suggestions appear in email, documents and chat tools.
Plans and pricing
| Plan | Price* | Key features |
|---|---|---|
| Free | $0 | Spelling and grammar, tone visibility, 100 AI prompts per month |
| Pro | $12/month, with a 7-day free trial | Full-sentence rewrites, tone adjustment, fluency help, plagiarism and AI-text detection, 2,000 AI prompts per month |
| Enterprise | Custom | Unlimited prompts, SSO/SCIM, data loss prevention, style guides and brand tones, dedicated support |
*Pricing shown on grammarly.com at the time of writing and may change.
Where it works
- Browser extensions for Chrome, Safari, Firefox and Edge
- Desktop apps for Windows and Mac
- Microsoft Word and Outlook, and Google Docs
- Mobile keyboard for iPhone, iPad and Android
Key features
Corrections and clarity
The core checker catches spelling, grammar and punctuation, and flags wordy or unclear sentences. Suggestions come with short explanations, which is helpful for non-native English writers.
Tone
Grammarly shows how your message may come across (e.g. confident, friendly, formal). Pro users can rewrite for a different tone in one click.
Generative AI
You can prompt Grammarly to draft, shorten, expand or rephrase text in place. The monthly prompt allowance depends on your plan.
Plagiarism and AI detection (Pro)
Useful for students and content teams wanting a quick originality check before publishing.
Pros and cons
Pros: works across nearly every app, strong free tier, clear explanations, team features for businesses.
Cons: suggestions can occasionally flatten your personal voice, the most useful rewrite features are paid, and you should review privacy settings before using it on sensitive documents.
Who should use it?
- Free: anyone who wants a reliable spell and grammar check.
- Pro: professionals, marketers, students and non-native speakers who write daily.
- Enterprise: companies needing brand consistency and admin controls.
Final verdict
Start with the free version. If you find yourself wanting rewrites and tone changes on most things you write, Pro is a sensible upgrade.