Grammarly
Most PopularWhat is Grammarly?
AI writing assistant that checks grammar, style, tone, and clarity in real time across browsers, docs, and email.
Grammarly checks grammar, spelling, tone, and clarity in real time across browsers, Microsoft Office, Google Docs, and most places you type online. Beyond corrections, it offers Authorship, a feature that tracks and discloses how a document was actually written (typed, pasted, or AI-generated) -- useful for students and professionals who need to demonstrate original work -- plus a set of specialized AI writing agents for tasks like proofreading, tone adjustment, and paraphrasing.
What are Grammarly's key features?
Real-time grammar and spelling checks
Catches errors as you type across the browser extension, desktop app, and Microsoft Office / Google Docs integrations.
Tone detection
Flags how a message is likely to read to the recipient (e.g. blunt, confident, worried) before you send it.
Clarity and style rewrites
Suggests full-sentence rewrites to tighten wordy or unclear phrasing, not just fix mechanical errors.
Authorship
Tracks the writing process of a document (typed vs. pasted vs. AI-generated text) and produces a report, useful for academic integrity and workplace disclosure requirements.
AI detection
Flags text that looks AI-generated, both in the free web checker and in more detailed Authorship reports on paid plans.
Plagiarism checker
Compares your text against billions of web pages and academic papers, available on paid plans.
Specialized AI agents
A set of purpose-built agents for tasks like proofreading a long document, adjusting tone, or paraphrasing, layered on top of standard suggestions.
Works across 500,000+ apps and sites
The browser extension and desktop app follow you into email, Slack, Docs, and most text fields system-wide.
What are Grammarly's pros and cons?
Pros
- Catches grammar, tone, and clarity issues
- Works across 500K+ apps
- Plagiarism checker included
- Native browser and MS Office support
Cons
- Advanced features require Premium
- Can over-suggest changes
- Tone detection not always accurate
What can you use Grammarly for?
How much does Grammarly cost?
Grammarly's Free plan includes spelling, grammar and tone detection with 100 AI prompts a month. Pro (formerly Premium) is $12 a month on annual billing, or $30 if you pay monthly according to recent guides, and raises the AI allowance to 2,000 prompts a month while adding full-sentence rewrites, tone adjustment, plagiarism and AI-text detection. Enterprise is custom-priced with unlimited prompts and SSO. Prices checked October 31, 2026.
Free
- 100 AI prompts per month
- Spelling, grammar and tone detection
Pro
- $12 on annual billing; about $30 monthly
- 2,000 AI prompts per month
- Full-sentence rewrites, plagiarism and AI-text detection
Enterprise
- Unlimited AI prompts
- SSO, SCIM and custom roles
How to use Grammarly
- Sign up free at grammarly.com and install the browser extension or desktop app.
- Enable Grammarly in Microsoft Word, Google Docs, or your email client via the relevant add-in.
- Write normally -- Grammarly underlines issues inline as you type and suggests fixes you can accept with one click.
- Use the tone and clarity suggestions before sending important emails or documents.
- Upgrade to Premium/Pro if you need the plagiarism checker, full-sentence rewrites, or Authorship reports.
Best Grammarly alternatives
QuillBot
A stronger dedicated paraphrasing tool if rewriting existing text is your main use case.
Wordtune
A lighter-weight rewriting tool worth comparing for quick tone and phrasing adjustments.
Jenni AI
Better suited to academic writing that needs citation support alongside editing.
Copy.ai
A better fit if you need to generate new marketing copy from scratch, not just edit existing text.
Is Grammarly worth it?
What makes Grammarly the most reliable, lowest-friction proofreading layer available is that it works everywhere you already write, catches real errors, and its Authorship feature adds a genuinely useful paper trail for anyone who needs to prove a document wasn't AI-written. It's not the right tool if you need to generate substantial new content from a brief -- Grammarly edits and improves existing text rather than drafting from scratch, so a generation-focused tool like Jasper or Copy.ai fits that job better, and its AI detection (like all AI detectors) shouldn't be treated as definitive proof either way.
How we write this page: details come from the tool's official site, documentation and pricing page, plus published reviews where noted. We have not tested every feature hands-on, and prices and limits change, so confirm them on the official site before you buy.
Frequently Asked Questions
Is Grammarly free to use?
Yes, the free plan covers basic grammar and spelling checks, the browser extension, and the Microsoft Office add-in. Advanced style rewrites, the plagiarism checker, and Authorship reports require a paid plan.
How much does Grammarly Premium cost?
Grammarly Pro (formerly Premium) is $12 a month on annual billing, or about $30 a month if you pay monthly. It adds full-sentence rewrites, tone adjustment, plagiarism and AI-text detection, and 2,000 AI prompts a month. The free plan has 100 AI prompts a month. Confirm the billing term at checkout.
What is Grammarly Authorship?
Authorship tracks how a document was written -- typed, pasted, or AI-generated -- and produces a report you can share to demonstrate the writing process, which is useful for students and professionals who need to disclose or prove original authorship.
Can Grammarly detect AI-generated text reliably?
It can flag likely AI-generated passages, and Authorship reports add process-level evidence, but like all AI detectors it isn't 100% accurate and shouldn't be used as the sole basis for high-stakes decisions.
Does Grammarly work in Google Docs and Microsoft Word?
Yes, Grammarly has dedicated integrations for both, plus a browser extension that works in most web-based text fields including email and Slack.
Is Grammarly only for grammar and spelling?
No -- beyond corrections, it offers tone detection, full-sentence clarity rewrites, a plagiarism checker, and a set of specialized AI agents for tasks like paraphrasing and proofreading long documents.
How does Grammarly compare to QuillBot?
Grammarly is stronger as an always-on proofreading and tone layer across everywhere you write; QuillBot is more focused specifically on paraphrasing and rewriting existing passages.
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