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Grammarly
★ FeaturedAI writing assistant that improves grammar, clarity, tone and plagiarism across 500,000+ apps.
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About Grammarly
Grammarly is the world's most widely deployed AI writing assistant, with over 30 million daily active users and native integrations across more than 500,000 apps and websites. Its browser extension activates in Gmail, Google Docs, Microsoft Word, Slack, LinkedIn, Twitter and virtually every other web-based editor — meeting writers where they already work. Beyond spell-check, Grammarly's AI analyses sentence clarity, conciseness, engagement and tone, offering specific rewrites rather than vague suggestions. GrammarlyGO, the generative AI feature, can draft full emails, rewrite paragraphs in a new tone or expand bullet points into polished prose within any text field. Grammarly Business adds a Style Guide and Brand Tone feature so entire teams write consistently according to company standards. The plagiarism checker cross-references 16 billion web pages, making it the standard tool for academic integrity. For non-native English writers, Grammarly Free is consistently rated the single most useful free productivity tool available.
Key Features
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Grammar and Spell Check : Catches errors other tools miss entirely
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Clarity Rewrites : Simplifies verbose or confusing sentences specifically
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Tone Detector : Shows how your writing sounds to the recipient
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GrammarlyGO : Generative AI for drafts, rewrites and expansions
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Plagiarism Checker : Cross-referenced against 16 billion web pages
Pros
- ✓Works inside 500,000+ apps via the browser extension
- ✓Tone and clarity suggestions go beyond grammar correction
- ✓Best free plan for non-native English writers worldwide
- ✓Plagiarism checker covers 16 billion web pages
- ✓GrammarlyGO for full generative drafting and rewriting
Cons
- ✗Premium cost scales for large business teams
- ✗Can over-suggest on intentionally creative or informal writing
- ✗No offline mode in the desktop application
Who is using Grammarly?
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Students, professionals, non-native English speakers, content writers, customer support agents and enterprise marketing teams.
Use Cases
- →Professional email tone-checking before sending
- →Academic essay editing and plagiarism verification
- →Business report and proposal polishing
- →Slack and Teams message improvement
- →Blog post and article proofreading at publication scale
Pricing
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Free : Grammar, spelling and basic writing suggestions
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Premium : $12/month — clarity, tone, GrammarlyGO, plagiarism check
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Business : $15/member/month — style guide, brand tone, team analytics
Pricing details may not be up to date. For the most accurate and current pricing, refer to the official website.
What Makes Grammarly Unique?
Grammarly is the only AI writing tool embedded natively across 500,000+ applications — it reaches writers in their existing environment rather than requiring a separate tab, which is why 30 million people open it every day.
How We Rated It
Tested across 8 content types for grammar suggestion accuracy, tone detection precision, GrammarlyGO output quality and plagiarism detection reliability.
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Accuracy and Reliability 4.5/5
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Ease of Use 4.9/5
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Functionality and Features 4.5/5
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Performance and Speed 4.7/5
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Customer Support 4.4/5
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Value for Money 4.6/5
AI summary
Grammarly is the essential AI writing layer for 30 million daily users — grammar, tone, clarity and generative AI in every app via browser extension.