Grammarly: AI Writing Assistant for Better Communication
Grammarly is an AI-powered writing assistant helping 40M+ people and 50K+ organizations improve grammar, tone, clarity, and style in real-time across 1M+ apps.
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About Grammarly
Grammarly is an AI-powered writing assistant that helps millions of users improve their writing across emails, documents, social media, and messaging platforms. Founded in 2009 in Ukraine, Grammarly has evolved from a basic grammar checker into a comprehensive communication platform powered by machine learning and generative AI. The tool provides real-time suggestions for grammar, spelling, punctuation, tone, clarity, and style while protecting user privacy without selling or monetizing content. With integrations across over 1 million apps and websites—including Gmail, Microsoft Word, Slack, Google Docs, and Zendesk—Grammarly works seamlessly wherever users write. The platform offers free and paid tiers (Free, Pro, and Enterprise) designed for individuals, teams, and large organizations seeking consistent, professional communication at scale.
Pricing
Free tier includes basic grammar, spelling, punctuation, and 100 AI prompts/month. Pro tier at $12/month (billed annually) or $30/month (monthly) includes full-sentence rewrites, tone adjustment, 2,000 AI prompts, plagiarism detection, and advanced vocabulary suggestions. Enterprise pricing is custom—contact sales. Annual billing provides up to 60% savings.
Key Features
- Real-Time Grammar & Spelling Checks: Instantly catches and corrects grammar, spelling, and punctuation errors as you type across all platforms
- Tone Detection & Adjustment: Analyzes writing tone and suggests adjustments to strike the right register for your audience (formal, casual, confident, etc.)
- Generative AI Assistance: Generate text, rewrite sentences, create outlines, draft content from scratch with 100-2000+ monthly AI prompts depending on tier
- Plagiarism Detection: Scans content against billions of web pages and academic sources to flag plagiarism and ensure originality
- Brand Voice & Style Guides: Customize style rules, upload company style guides, and apply consistent brand tone across team communications
- Cross-Platform Integration: Works seamlessly in 1M+ apps including Gmail, Microsoft Word, Slack, Google Docs, Salesforce, Zendesk, and more
Pros
- Ubiquitous integration across 1M+ apps and websites eliminates need to switch platforms
- Real-time feedback helps catch errors instantly and improves writing quality with minimal friction
- Free tier provides solid foundational grammar and spelling checks with no hidden costs
- Enterprise-grade security with SOC 2, ISO 27001/27017/27018 certifications and GDPR compliance protects user data
- Generative AI features enable content generation, rewriting, and tone adjustment without external tools
Cons
- No offline mode—requires internet connection for all features to function
- Suggestions are not always contextually accurate; AI can misfire on nuance-dependent writing and creative prose
- Large feature gap between Free and Pro tiers may frustrate users; aggressive upsell messaging
- Limited support for languages beyond English despite multilingual expansion claims
- Plagiarism and AI detection tools suffer from accuracy issues that can mislead students and professionals
Frequently Asked Questions
Is Grammarly free?
Yes, Grammarly offers a free tier that includes basic grammar, spelling, and punctuation checks plus 100 monthly AI prompts. The Pro tier ($12/month billed annually) adds full-sentence rewrites, tone detection, plagiarism checking, and 2,000 monthly AI prompts. Enterprise plans have custom pricing.
What platforms does Grammarly work on?
Grammarly works on Windows and Mac desktops, iOS and Android mobile devices, and web browsers (Chrome, Safari, Firefox, Edge). It integrates with 1M+ apps including Gmail, Microsoft Word, Google Docs, Slack, Zendesk, Jira, Salesforce, LinkedIn, and more.
Does Grammarly sell or use my writing data?
No. Grammarly explicitly does not sell, monetize, or allow third-party partners to train their models on user content. The company makes money only when users purchase paid plans. Data is encrypted to enterprise standards and complies with GDPR and HIPAA.
Can Grammarly detect AI-generated content?
Grammarly includes an AI Detector feature that analyzes text to flag potentially AI-generated content with a confidence score. However, users report the tool has accuracy limitations and sometimes misidentifies human writing as AI or vice versa.
Does Grammarly support languages other than English?
Grammarly primarily supports English with variants (American, British, Australian, Canadian). Recent updates added generative AI and translation for French, German, Italian, Portuguese, and Spanish, but core grammar and plagiarism checks remain English-focused.
Can Grammarly work offline?
No. Grammarly requires an active internet connection to function. It is cloud-based and does not offer offline mode, which limits utility for writers without consistent connectivity.
How does Grammarly's plagiarism checker work?
Grammarly's plagiarism detection scans user text against billions of web pages, academic databases, and sources to flag similar content and unoriginal passages. It then suggests proper citations or paraphrasing to help users create original work.