Grammarly

Grammarly is an AI writing assistant that reviews what you type and suggests corrections as you go. It starts with spelling, grammar, and punctuation, then moves into clarity, full-sentence rewrites, and tone. A humanizer agent adds personality to stiff or machine-sounding text, while an AI detector agent flags passages that look generated and points to what needs revision. The assistant runs across browser, desktop, mobile, and documents, so the same suggestions follow you from an email to a report. A free plan covers the basics, and the paid plan unlocks the deeper rewriting and detection features.

Key Features

• Proofreading that corrects spelling, grammar, punctuation, and structural issues.
• Full-sentence rewrites that improve clarity and flow with one click.
• Tone suggestions that adapt a message to its context, plus a view of how your writing currently sounds.
• An AI detector agent that flags AI-generated text and highlights areas to revise.
• Plagiarism detection on the paid plan.
• Brand and style guide support, so suggestions match an organization's preferred language.
• Availability in the browser, on desktop and mobile, and inside documents.

Who is it for

• Students who need cleaner essays and fewer mechanical errors before submission.
• Professionals writing emails, reports, and proposals where tone matters.
• Marketing and content teams that want a consistent voice across published work.
• Customer support and sales teams that need clear, on-brand replies at speed.
• Organizations that want style guidance applied across many writers.

What can you do with Grammarly

• Proofread an email or document before sending it and accept fixes in a few clicks.
• Rewrite a clumsy paragraph so it reads clearly without changing your meaning.
• Adjust the tone of a message for a client, a manager, or a wider audience.
• Check a draft for AI-generated passages and decide what to revise.
• Apply a brand style guide to writing produced by several people.
• See how a reader is likely to react to a message before you send it.

How does Grammarly work

• Install the browser extension, desktop app, or mobile keyboard, or open the web editor.
• Start typing in an email, document, or web form as you normally would.
• Grammarly underlines issues and offers corrections, rewrites, and tone advice in context.
• Accept the suggestions you want, or ask for a rewrite of a sentence or paragraph.
• Run plagiarism or AI-detection checks on a draft when you need them.
• For teams, connect a style guide so suggestions follow your organization's preferences.

Pricing

• Free: $0 per month, covering error correction, tone detection, and a limited number of AI prompts.
• Pro: $12 USD, adding full-sentence rewrites, tone adjustment, plagiarism detection, AI detection, and more AI prompts.
• Enterprise: contact sales for organization-wide deployment, dedicated support, and admin controls.

FAQ

What is the difference between Free and Pro?

Free corrects mistakes and shows your tone. Pro adds full-sentence rewrites, tone adjustment, plagiarism detection, AI-generated text detection, and a larger AI prompt allowance.

Does Grammarly work outside its own editor?

Yes. It runs in the browser, on desktop and mobile, and inside documents, so suggestions appear in the apps where you already write.

Can Grammarly detect AI-generated text?

Yes. The AI detector agent flags text that looks AI-generated and shows which areas may need revision.

Is my writing used to train models?

Grammarly states that it does not sell or monetize user content, provide it for advertising, or let third-party providers train models on it.

Is there a team or enterprise option?

Yes. Enterprise adds deployment support, dedicated support, BYOK encryption, custom roles and permissions, and data loss prevention.