Grammarly
AI-powered writing assistant that helps 30M+ daily users communicate more effectively with real-time grammar, clarity, and tone suggestions
Overview
Grammarly is the leading AI-powered writing assistant used by 30+ million people daily across 500,000+ apps and websites. Founded in 2009, it has evolved from a basic grammar checker into a comprehensive communication platform with generative AI capabilities. The tool provides real-time suggestions for grammar, spelling, punctuation, clarity, engagement, and tone—working seamlessly in browsers, desktop apps, email clients, and word processors. With GrammarlyGO (their generative AI feature), users can now compose, rewrite, and ideate content beyond just corrections. Enterprise teams at companies like Zoom, Cisco, and Expedia rely on Grammarly Business for brand-consistent communication.
The Verdict
Who Should Use Grammarly?
Best For
- Non-native English speakers and ESL learners
- Business professionals writing emails daily
- Students needing academic writing support
- Content creators focused on clarity and engagement
- Enterprise teams needing brand voice consistency
- Anyone wanting "works everywhere" writing help
Not Ideal For
- Creative writers (suggestions can feel formulaic)
- Technical documentation (misunderstands jargon)
- Heavy long-form content (use Notion AI or ChatGPT)
- Budget users (Premium required for full value)
- Privacy-concerned users (cloud-based processing)
What's Great
- Works everywhere: 500K+ apps via browser extension, desktop, mobile
- Catches errors other tools miss—context-aware grammar (G2: 200+ mentions)
- Tone detection helps avoid miscommunication in emails
- Clean, non-intrusive inline suggestions
- Plagiarism checker included in Premium
- GrammarlyGO generates and rewrites content with AI
- Style guides for brand consistency (Business)
Watch Out For
- Free tier is very limited—Premium is the real product
- Can over-correct creative or stylistic writing (G2: 50+ mentions)
- GrammarlyGO has monthly prompt limits even on Premium
- Doesn't work well in some apps (Google Docs can be glitchy)
- Privacy concerns: text is processed on Grammarly servers
- Annual billing pushed heavily—monthly is expensive ($30/mo)
Pricing
View all features & details
Writing Features
- Grammar & spelling corrections
- Punctuation suggestions
- Clarity & conciseness improvements
- Tone detection & adjustment
- Word choice & vocabulary enhancement
- Plagiarism detection (Premium)
- Full-sentence rewrites
- GrammarlyGO generative AI
Platforms
- Chrome, Firefox, Safari, Edge extensions
- Windows & macOS desktop apps
- iOS & Android keyboards
- Microsoft Word add-in
- Google Docs integration
- Outlook add-in
- Web editor (app.grammarly.com)
Integrations
- Gmail & email clients
- Slack
- Salesforce
- Notion
- 500,000+ websites & apps
Security & Compliance
- SOC 2 Type 2 certified
- GDPR compliant
- HIPAA compliant (Enterprise)
- SSO & SCIM (Enterprise)
- Data encryption in transit & at rest
- No selling of user data
Real-World Usage
User Base
- 30M+ daily active users
- 70K+ professional teams
- 3,000+ enterprise customers
- Used in 500,000+ apps & websites
Enterprise Adoption
- Zoom: company-wide deployment
- Cisco: 10,000+ employees
- Expedia: global communications
- Databricks: engineering teams
How It Compares
| Feature | Grammarly | ChatGPT | Notion AI | ProWritingAid |
|---|---|---|---|---|
| Grammar Checking | Best-in-class | Basic | Basic | Strong |
| Works Everywhere | 500K+ apps | Web/app only | Notion only | Limited |
| Generative AI | GrammarlyGO | Full GPT | Good | Basic |
| Tone Detection | Excellent | Manual | Basic | Good |
| Plagiarism Check | Yes | No | No | Yes |
| Style Guides | Business/Enterprise | No | No | Yes |
| Free Tier | Limited | Yes (with ads) | Trial only | Yes |
| Starting Price | $12/mo | $20/mo | $10/mo | $10/mo |
| Best For | Daily writing | Content creation | Note-taking | Long-form writing |