Grammarly

Grammarly Inc., US

⭐⭐⭐⭐⭐ 4.5/5

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📊 Quick Facts

Pricing Modelfreemium

Categorywriting

Users40M+ daily, 50K+ organizations

Founded2009

HQSan Francisco, CA, USA

Employees1,000+

Monthly Visits55M+

LanguagesEnglish (US),English (UK),English (Australian),English (Canadian),English (Indian),30+ English dialects

PlatformWeb, Chrome Extension, Edge Extension, Firefox Extension, iOS, Android, Windows, macOS, Microsoft Word Add-in, Google Docs Add-in

DeploymentCloud + Browser Extension

Last Verified2026-08-06

📝 About Grammarly

AI writing assistant with Smart Drafts feature (2,000 AI prompts/mo in Pro). Merged Premium into Pro and Business into Enterprise.

💰 Pricing

Free: basic; Pro: $12/mo; Enterprise: custom

✨ Key Features

Smart Drafts: generate full documents from short promptsTone Rewriter: change tone while preserving meaning (confident, friendly, formal, etc.)Humanizer agent: give AI-generated text natural personalityAI Detector agent: identify AI-written text and areas to reviseGrammar, spelling, punctuation: 93-98% accuracyFull-sentence rewrites for clarity and concisenessPlagiarism checker with source matchingBrand Voice: enforce consistent style across teams1M+ integrations: Gmail, Docs, Slack, LinkedIn, Notion, Word, etc.Multilingual: Spanish, French, Portuguese, German, Italian

🏷️ Tags

writinggrammareditingtoneai-detection

⚖️ Pros & Cons

✓ Pros

Industry-leading AI technology with proven track record
Comprehensive feature set for diverse use cases
Strong integration ecosystem and developer community
Excellent performance and reliability at scale

✗ Cons

Premium features require paid subscription
Learning curve for advanced functionality
Limited offline capabilities in cloud-dependent workflows
May require technical expertise for optimal configuration

🎯 Use Cases

• writing

• editing

• business-communication

• academic

• content-creation

• email

✔ Best For

Grammar CorrectionTone AdjustmentPlagiarism CheckingAI Writing DetectionStyle ImprovementBusiness Writing

🧠 Models

GrammarlyGO (Generative AI)
NLP/ML Error Detection Model
On-Device Llama Model (~1B)
Style & Tone Model
Plagiarism Detection Model
AI Detection Model
8 Specialized AI Agents (2025)

🔗 Integrations

Google DocsMicrosoft WordMicrosoft OutlookGmailSlackDiscordLinkedInMediumSafariEdge

📈 Benchmarks

Grammar correction accuracy: 95%+:

Tone detection: 90%+ accuracy:

Plagiarism check: checks 16B+ web pages:

🔀 Alternatives

QuillBot ProWritingAid ChatGPT

📅 History

2009 Founding - Grammarly founded

2010s Growth - Browser extensions and mainstream growth

2023 GrammarlyGO - Generative AI features added

2025-2026 Enhancements - Improved generative capabilities

❓ FAQ

Is Grammarly free?

Yes, Grammarly offers a free tier with basic grammar and spelling checks. Premium adds style, tone, and plagiarism detection.

Does Grammarly work with Microsoft Word?

Yes, Grammarly has a Microsoft Word add-in for Windows and Mac.

Is Grammarly AI detection accurate?

Grammarly's AI detection is designed to identify AI-generated text patterns, but like all detectors, it's not 100% accurate.

🇨🇳 China Insight

Grammarly is accessible in China but can be slow. Chinese users often use Meta Writing Cat or other local writing assistants for Chinese content.

🔒 Data & Compliance

Data PolicyUser text processed for suggestions; data not sold to third parties. Enterprise plan excludes data from training.

ComplianceSOC 2 Type II,GDPR,CCPA,HIPAA (Enterprise)

Content ModerationAI-powered content filtering for inappropriate language; enterprise admins can set custom style guides and banned terms

Data RetentionUser data retained for account lifetime; deletable on request. Enterprise: customizable retention policies.

🌐 Social & Community

X/Twitter LinkedIn Instagram

💬 Reviews

G2: 4.7/5 (2,000+ reviews),Trustpilot: 4.5/5 (10,000+ reviews),Capterra: 4.7/5