Grammarly: AI Writing Assistant for Grammar and Tone

Grammarly is an AI writing assistant that checks grammar, spelling, and punctuation in real time and suggests tone, clarity, and full-sentence rewrites. It works as a browser extension, desktop app, and plugin across word processors, email, and most websites, so suggestions appear inline as you type instead of in a separate tool.

What this AI writing assistant does

Grammarly corrects grammar, spelling, and punctuation mistakes, and its editor also flags overused words, awkward phrasing, and inconsistent tone. Paid plans add full-sentence and paragraph rewrites, an AI chat for brainstorming and drafting, a plagiarism checker, and an AI detector for spotting AI-generated text.

Where this AI grammar checker works

Grammarly runs inside Google Docs, Microsoft Word, Gmail, Slack, and more than a million other apps and websites through its browser extension and desktop app, so writers get inline suggestions without switching tools or copying text elsewhere.

Pricing and limits for the AI writing assistant

The Free plan covers unlimited grammar and spelling checks plus a capped number of AI prompts per month. Pro adds full-sentence rewrites, tone adjustment, and a much higher AI-generation limit, while Enterprise adds unlimited generative AI, confidential mode, and admin controls for teams.

Privacy for this grammar checker

Grammarly states it does not sell or monetize user content, does not use it for advertising, and does not allow third-party providers to train models on user content, which matters for anyone pasting confidential drafts or client material.

Frequently asked questions about this AI writing assistant

Is Grammarly free to use?

Yes. The Free plan includes core grammar, spelling, and punctuation checking with a limited number of AI-generated prompts per month; Pro and Enterprise plans unlock full-sentence rewrites and higher AI limits.

Does Grammarly work outside English?

Grammarly's multilingual writing support covers several additional languages for grammar and inline translation suggestions, though its deepest feature set remains built around English.

Can Grammarly replace a human editor?

It reliably catches mechanical errors and suggests clarity improvements, but it cannot fully judge argument structure or nuanced style choices, so important documents still benefit from human review.