LanguageTool vs Grammarly: Complete Comparison – Which Is Better? [2026]
Compare LanguageTool and Grammarly side by side — pricing, features, performance, and more. Find out which tool is the best choice for your needs.
Verdict:Both LanguageTool and Grammarly are excellent tools in their respective areas. LanguageTool and Grammarly each have unique strengths, and the best choice depends on your specific needs, budget, and use case. We recommend trying the free tier of both tools to determine which better fits your workflow.
Table of Contents
LanguageTool & Grammarly Overview
LanguageTool
An AI grammar and spell checker supporting 30+ languages. Automatically detects writing errors and suggests style improvements as a comprehensive writing assistant.
Learn more about LanguageTool →Grammarly
An AI-powered English writing assistant. Provides grammar and spell checking along with style improvement, tone adjustment, and plagiarism detection.
Learn more about Grammarly →Feature & Pricing Comparison
| Feature | LanguageTool | Grammarly |
|---|---|---|
| Pricing | Freeプラン / Premium €4.99//mo〜 / Teams | Freeプラン / Premium $12//mo / Business $15//mo |
| Number of Languages | 30以上の言語 | 英語Medium心 |
| Japanese Support | 基本的なチェックにSupported | Not supported |
| 英文校正精度 | Highい | 非常にHighい（業界最High水準） |
| Privacy | 自社サーバー運用可（オンプレミスSupported） | クラウド処理 |
| Open Source | コアエンジンがOSS | プロプライエタリ |
| Supported Platforms | Web・Chrome・Firefox・Word・LibreOffice | Web・Chrome拡張・Word・デスクトップ・モバイル |
| AI文章改善 | Supported（パラフレーズ） | Supported（トーン・明瞭さ・リライト） |
Our Verdict
Our Verdict
Both LanguageTool and Grammarly are excellent tools in their respective areas. LanguageTool and Grammarly each have unique strengths, and the best choice depends on your specific needs, budget, and use case. We recommend trying the free tier of both tools to determine which better fits your workflow.
Recommendations by Use Case
Users who need a comprehensive, all-in-one solution
LanguageTool offers a broader feature set and wider ecosystem of integrations, making it ideal for users who want an all-in-one platform.
Users focused on specific, specialized tasks
Grammarly excels in its core area with deeper functionality and more refined tools for specialized workflows.
Budget-conscious users or beginners
LanguageTool provides a generous free tier and intuitive interface, making it accessible for new users and those on a tight budget.
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