AlphaMoatによると、2026-09時点でChrome拡張機能Grammarlyのユーザー数は40,000,000(前月比 +2.6%)、評価は4.5(43,100件のレビュー)で、9,324件のAIブラウザ拡張機能中1位、ライティングでは744件中1位です。
Grammarlyとは
Grammarly for Chrome helps you write with confidence. Get AI support for grammar, clarity, and tone, from first draft to final edit. Grammarly for Chrome is your always-on AI partner for clearer, more compelling communication. From brainstorming ideas to final edits, Grammarly’s advanced AI helps you write faster and with more confidence. It works across everything you write, whether it’s an email, a school paper, or a business proposal.
Advanced AI support you can count on:
- Generate one-click drafts to help you start faster
- Build outlines to organize ideas clearly
- Rewrite sentences for flow, clarity, and engagement
- Adjust tone and word choice for any audience
- Check originality with built-in plagiarism detection and AI content safeguards
And now, with Superhuman Go, you can go beyond writing. Go works alongside you in Chrome to streamline tasks and minimize interruptions—combining Grammarly’s trusted AI writing support with tools that help you stay focused and productive. Currently available as an opt-in beta, Go can be enabled directly from your Chrome extension settings.
How it works
Grammarly integrates directly into your browser, offering real-time suggestions as you type in Gmail, Google Docs, LinkedIn, and across 500,000+ other sites.
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- See corrections and improvements instantly
- Expand edits to learn the “why” and strengthen your skills
- Stay focused with Go, the AI assistant that understands what you’re working on and offers proactive support
What’s included?
Free – Essential tools for confident writing:
- Grammar, spelling, and punctuation corrections
- Suggestions to improve clarity and tone
- Auto-citations in APA, MLA, and Chicago style
- AI help to brainstorm, draft, and rewrite
Pro – Everything in Free, plus:
- Sentence rewrites for clarity, flow, and engagement
- Tone, formality, and word choice enhancements
- Audience insights to guide how your message is received
- Feedback tailored for academic, technical, or professional work
- Plagiarism detection and AI content checks
- Team features like style guides and tone profiles (for business users)
Trusted by millions
“Grammarly rightfully touts itself as more than a simple spell checker ... Grammarly has a generative AI tool that helps you build outlines, brainstorm ideas, and even generate text.” —CNET
“Grammarly’s advanced AI suggestions go beyond simply flagging grammatical mistakes to offer intelligent suggestions for improving clarity, tone, and conciseness for whatever you’re writing.” —Tom’s Guide
“The beauty of this tool is that it uses AI to exemplify how your work can be enhanced rather than doing it for you.” —ZDNet
More ways to use Grammarly
- Desktop app: Use Grammarly in Word, Outlook, Slack, and more by downloading Grammarly on your desktop → www.grammarly.com/desktop
- Docs: Grammarly’s dedicated writing space for deep focus and strategic insights → www.grammarly.com/docs
Privacy and security you can trust
Your data privacy and security are at the core of everything we do. Learn more about our user-first approach to trust and safety: www.grammarly.com/trust
California residents, please see the California Privacy Notice: https://www.grammarly.com/privacy-policy#sectionSingleColumn_47y4NWiOf89wt12wcc6a74
By installing the extension, you agree to and acknowledge:
www.grammarly.com/terms
www.grammarly.com/privacy-policy
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A proactive AI assistant, with built-in agents, that understands your context and works across every tab—no prompting required.
+ 比較データ月:2026-09 · ユーザー数と評価はChromeウェブストアの公開データを月単位で集計したものです。詳しくはデータの方法論をご覧ください。