Grammarly
Visit Grammarly →About Grammarly
Grammarly is the most widely used AI writing assistant, with 40 million daily active users and integrations across Microsoft Office, Google Docs, Gmail, Slack, and virtually any text field via its browser extension. The product is used by individuals for personal writing improvement and by businesses for maintaining consistent communication standards.
Grammarly checks and corrects grammar, spelling, punctuation, style, clarity, engagement, and delivery. The AI generative features (Pro) allow full-sentence rewrites, tone adjustment, email drafting from bullet points, and document summaries. The tone detector is particularly useful for business communications — identifying whether a message reads as confident, diplomatic, formal, or empathetic before sending.
Key capabilities include real-time grammar and style correction, tone detection and adjustment, AI text generation and rewriting, document summarization, plagiarism detection (Pro), 500K+ word spell-check database, browser extension for all web apps, Microsoft Office and Google Docs add-ons, and a Grammarly keyboard for mobile.
Pricing: Free plan provides grammar and spelling correction with basic style suggestions and 100 AI prompt uses per month. Pro at $12 per month (annual) or $30 per month (monthly) provides full AI generative features, tone rewriting, plagiarism detection, and unlimited AI prompts. Business (formerly available as a tier) has been moved to Enterprise-only for organizations above a certain size — business teams now need to contact sales.
Limitations: The Pro plan at $30/month (monthly) is expensive — the $12/month rate requires annual commitment. Removing the Business tier creates a gap between individual Pro and Enterprise, complicating pricing for small business teams. Grammarly's corrections are context-unaware at scale — it sometimes flags intentional stylistic choices as errors.
Best suited for professionals, students, and content creators who write significant volumes of email, documents, and content and want real-time AI feedback on clarity and correctness without switching tools.
- 40M daily active users — most widely adopted writing assistant
- Works across all apps via browser extension — no workflow change required
- Tone detector identifies how messages read before sending
- Free tier provides real grammar and style correction — genuinely useful without paying
- Microsoft Office and Google Docs integrations for native document editing
- Pro monthly rate ($30/mo) expensive — annual commitment required for $12/mo
- Business tier removed — teams now require Enterprise pricing (contact sales)
- Context-unaware corrections sometimes flag intentional stylistic choices as errors
- Generative AI features less sophisticated than purpose-built writing tools
Choose Grammarly if…
- ✅ You write in English and want real-time grammar, style, tone, and clarity suggestions
- ✅ You need a browser extension that works across Gmail, Docs, Slack, and any text field
- ✅ You want AI-powered rewriting, tone detection, and plagiarism checking
- ✅ You're a student, writer, or professional who writes daily and wants consistent quality
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