What is Grammarly?
Grammarly is probably the most widely used writing correction tool in the world: it fixes grammar, spelling and punctuation in real time, wherever you write, from Gmail to Google Docs to any website's text fields, thanks to a browser and app extension. Since October 2025 the company behind it has been called Superhuman, while Grammarly remains the product name.
With the arrival of generative AI features, Grammarly moved from a simple proofreader to a more complete writing assistant, able to rewrite sentences, change tone and even generate entire paragraphs from an instruction.
Main Features
- Real-time grammar correction: catches errors as you type, anywhere in the browser
- Tone suggestions: flags whether a text sounds too formal, aggressive or unclear
- AI rewriting: proposes alternative versions of a sentence or an entire paragraph
- Plagiarism check: verifies text originality against published online sources
- Content generation: writes drafts from a prompt, not just corrections
- Cross-platform integration: works in the browser, Microsoft Office, Google Docs and desktop apps
How Does Grammarly Work?
Once the extension or desktop app is installed, Grammarly analyzes text as it's written, underlining errors and highlighting clickable improvement suggestions. Each suggestion explains the reason for the correction, useful for learning from recurring mistakes over time.
The more advanced AI features let you select text and ask Grammarly to make it more concise, more formal, or a different tone, or generate a paragraph from scratch starting from a few keywords.
Who is Grammarly for?
- Students writing essays and theses in a non-native language
- Professionals writing emails and documents in English daily
- Content writers wanting a double quality check before publishing
- Non-native English speakers wanting to write with more confidence
- Company teams wanting to standardize tone and quality of written communication
Use Cases
- Automatically correcting emails before sending
- Checking that an academic essay has no unintentional plagiarism
- Adjusting a message's tone from informal to professional
- Rewriting unclear sentences in a business document
- Learning from your own recurring grammar mistakes over time
Pricing
Grammarly offers a free plan with basic corrections always active. The Pro plan, which adds advanced AI rewriting, plagiarism check and more sophisticated tone suggestions, costs €12 per month billed annually (€144 per year) or €30 billed monthly. For companies there is the Enterprise plan, sold through Superhuman Go.
Pros and Cons
Pros:
- Works everywhere thanks to the browser extension, not just in a dedicated app
- Free plan already very useful for daily corrections
- Explains the reason for each correction, helping you learn over time
Cons:
- Content generation features remain more limited than AI-first tools
- Advanced plagiarism check is reserved for paid plans
- Can feel intrusive with too many suggestions on already well-written text
Final Verdict
Grammarly remains the standard for English writing correction, and it now also corrects Italian, with a free plan that already covers most daily needs. For those seeking more advanced content generation, dedicated tools like Jasper offer broader features.