Grammarly vs Microsoft Copilot comparison

By starting price alone, Microsoft Copilot is $5.01 cheaper. But price is not everything, so check the highlighted rows in the table below.

Grammarly and Microsoft Copilot compared side by side in AI.

CurrencyUSDKRWEUR

Grammarly

An AI writing assistant that fixes English grammar and sentences

What is good

  • English proofreading anywhere in browsers and apps
  • Useful for business English

What could be better

  • Advanced style and tone suggestions and paragraph rewriting are limited to 6 languages including English (Korean gets only spelling, basic grammar and translation)
  • Monthly billing is expensive

Grammarly official site

Microsoft Copilot

Microsoft's AI assistant built into Windows, Edge and Office

What is good

  • Works directly with Windows, Word and Excel
  • Latest-level models available for free

What could be better

  • Office integration features need a Microsoft 365 subscription
  • Weak personality as a standalone chatbot

Microsoft Copilot official site

At a glance

Highlighted rows are where they differ.

ItemGrammarlyVisit siteMicrosoft CopilotVisit site
Starting price$15+Official USD price$9.99+Official USD price
Free tierFree plan availableFree plan available
Korean supportAverageGood
Main models
  • In-house proofreading model + generative AI
  • AI agents (AI Detector/plagiarism check/AI Grader and others)
  • Superhuman Go
  • OpenAI GPT-5 family (Smart/Think Deeper)
  • GPT-5.5/Claude selectable for business
  • MAI in-house models (image/voice)
TypeAI servicesAI services
CategoryWriting/ProductivityChatbot/Assistant, Writing/Productivity
CompanyGrammarly (Superhuman), United StatesMicrosoft, United States
Plans
  • Free
  • Pro $15 (annual billing $12)
  • Business $40 ($33 annual, Mail included)
  • Enterprise
  • Free
  • M365 Personal $9.99
  • Family $12.99
  • Premium $19.99
  • Pro $99.99
  • For business: Copilot Business $21 (annual), Enterprise $30 (annual)
Pros
  • English proofreading anywhere in browsers and apps
  • Useful for business English
  • Works directly with Windows, Word and Excel
  • Latest-level models available for free
Cons
  • Advanced style and tone suggestions and paragraph rewriting are limited to 6 languages including English (Korean gets only spelling, basic grammar and translation)
  • Monthly billing is expensive
  • Office integration features need a Microsoft 365 subscription
  • Weak personality as a standalone chatbot

Prices and benefits may change. Check the official site before you pay.

Prices converted at 1 USD = ₩1,325.57 (2026-10-21). Original price shown in brackets. Taxes as listed by each provider.

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