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Grammarly

Write with confidence — grammar, clarity and tone AI

4.6Editorial
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VantageLabs Editorial Research Team

Reviewed by VantageLabs Editorial Research Team

Coverage area: AI Tools & Productivity

Updated May 2026Hands-on testedEditorially independentHow we test tools →
Disclosure:This review may contain affiliate links. If you click and purchase, VantageLabs may earn a commission at no extra cost to you. Our editorial scores are never influenced by commercial relationships. Learn more

Overview

Grammarly is the world's most widely used AI writing assistant, with 30 million daily users. It catches grammar and spelling errors, improves sentence clarity, adjusts tone, detects plagiarism, and now includes a full generative AI writing assistant.

Best For

WritersStudentsProfessionalsNon-native English speakers

Key Features

  • Real-time grammar and spelling correction
  • Tone and clarity suggestions
  • Plagiarism detection across 16 billion web pages
  • Generative AI writing and rewriting
  • Works in browser, Word, Outlook and Gmail

Pros

  • Works across every writing context
  • Catches nuanced grammar errors humans miss
  • Free tier is genuinely useful for daily writing
  • Tone detection is market-leading

Cons

  • Premium required for plagiarism checker
  • Can over-suggest edits to intentional stylistic choices
writinggrammarAIproductivityspell checkclarity
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Pricing

Plan typeFreemium
PricingFree / $12/mo Premium
Free tier available
Available in the UK
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Editorial Score

4.6

VantageLabs editorial score

Our Promise

Score never influenced by affiliate relationships
30-day minimum hands-on testing
Published, consistent scoring criteria
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