Grammarly vs LanguageTool: Tone Control, Templates & Value
Grammarly vs LanguageTool — which gives better tone control, richer templates, and more value for content teams?
- Category
- AI Writing & Content Tools
- Format
- Head-to-head
- Updated
- April 5, 2026
How they compare
| Feature |
Grammarly
|
LanguageTool
|
|---|---|---|
| Made by | Grammarly, Inc. | LanguageTooler GmbH |
| Category | AI Assistant AI Book Writing Office & Productivity Writing & Editing | AI Grammar Checker Tools AI Writing & Content Tools Research & Data Analysis |
| Pricing model | Free Freemium Subscription | Free Freemium Subscription |
| Platforms | Android Chrome Extension Desktop App Firefox Extension +4 more | API Browser Extensions Desktop Mobile +1 more |
| Built with | JavaScript Machine Learning Python | Java JavaScript |
| Languages | English | Dutch English French German +2 more |
| Based in | United States | Germany |
Greyed rows are the same for both tools.
What each one is
Grammarly
Grammarly is an AI-powered writing assistant designed to help users improve their written communication by providing real-time grammar, spelling, punctuation, and style suggestions. It integrates seamlessly with web browsers, desktop applications, and mobile devices to support writing across emails, documents, social media, and more.
LanguageTool
LanguageTool is an AI-powered multilingual writing assistant designed to help users improve grammar, spelling, punctuation, and style in their texts. It supports over 20 languages and offers real-time suggestions to enhance clarity and correctness. Available as a web service, browser extension, desktop app, and API, LanguageTool caters to individuals, professionals, and developers seeking reliable proofreading and editing assistance.
Key features
Grammarly
-
Real-Time Grammar and Spell Check
Detects and corrects grammar, spelling, punctuation, and syntax errors as you write.
-
Tone Detection
Analyzes the tone of your message to ensure it matches your intended audience and purpose.
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Plagiarism Checker
Compares your text against billions of web pages to detect unoriginal content.
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Writing Style Customization
Set goals based on audience, formality, domain, and intent to receive tailored suggestions.
-
Vocabulary Enhancement
Offers synonym suggestions and word choice improvements to enrich your writing.
LanguageTool
-
Multilingual Grammar Checking
Supports grammar and spell checking in over 20 languages with language-specific rules.
-
Style and Tone Suggestions
Offers recommendations to improve readability, tone, and writing style.
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Browser Extensions and Integrations
Available for Chrome, Firefox, Edge, and integrates with Google Docs, Microsoft Word, and LibreOffice.
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Customizable Rules
Users can add personal or organizational rules to tailor the checking process.
-
API Access
Developers can integrate LanguageTool’s capabilities into their own software via a REST API.
Pricing
Plans as published by each vendor. Check the vendor site before buying — pricing changes.
Grammarly
Free $0/month
Basic grammar, spelling, and punctuation checks with limited features.
Pro (monthly) $30/month
Advanced grammar, style, tone, vocabulary suggestions, and plagiarism detection.
Pro (annual) $12/month (billed $144/year)
Team management, centralized billing, style guides, and priority support for organizations.
Enterprise Custom pricing
LanguageTool
Free $0/month
Basic grammar and spell checking with limited daily usage and fewer advanced suggestions.
Premium $19/month
Enhanced grammar, style, and punctuation checks with higher usage limits and priority support.
Enterprise Custom pricing
Tailored solutions for businesses with advanced features, API access, and dedicated support.
Strengths and trade-offs
Grammarly
Strengths
- Accurate and comprehensive grammar and style checking
- Easy integration with multiple platforms and apps
- Helpful explanations for suggested corrections
- Customizable writing goals for different contexts
- Includes plagiarism detection in premium plans
Trade-offs
- Premium features require subscription
- Internet connection needed for real-time suggestions
- Limited support for languages other than English
LanguageTool
Strengths
- Supports a wide range of languages with accurate grammar checking
- Offers style and tone improvement suggestions beyond basic grammar
- Multiple platform availability including browser extensions and desktop app
- Customizable rules for personalized grammar checking
- API access for developer integration
Trade-offs
- Free plan has usage limits and fewer advanced features
- Some complex grammar nuances may require manual review
- Offline functionality limited to desktop app only
Who it is for
Grammarly
- Students and educators
- Professional writers and editors
- Business professionals
- Content creators and marketers
- Non-native English speakers
LanguageTool
- Students and academics
- Professional writers and editors
- Multilingual users and language learners
- Businesses requiring consistent writing quality
- Developers integrating grammar checks into apps
What people use it for
Grammarly
-
Grammar and Spell Checking
Automatically detect and correct grammar, spelling, and punctuation errors in real-time across various platforms.
-
Writing Style Enhancement
Improve clarity, tone, and style of writing with suggestions tailored to different writing goals.
-
Plagiarism Detection
Scan text against billions of web pages to identify potential plagiarism and ensure originality.
-
Professional Communication
Enhance emails, reports, and business documents to maintain professionalism and clear communication.
-
Academic Writing Support
Assist students and researchers in producing error-free essays, papers, and theses.
LanguageTool
-
Grammar and Spell Checking
Automatically detect and correct grammar, spelling, and punctuation errors in multiple languages.
-
Style and Clarity Improvement
Receive suggestions to improve writing style, tone, and clarity for professional and academic texts.
-
Multilingual Writing Support
Support for over 20 languages helps users write accurately in their native or foreign languages.
-
Integration with Writing Platforms
Use LanguageTool as an extension or plugin in popular editors like Google Docs, Microsoft Word, and LibreOffice.
-
API for Developers
Integrate LanguageTool’s grammar checking capabilities into custom applications via a REST API.
Getting started
Grammarly
Install and Integrate
Add Grammarly as a browser extension, desktop app, or mobile keyboard to enable writing assistance across platforms.
Write or Upload Text
Type directly into Grammarly’s editor or upload documents for analysis.
Receive Real-Time Suggestions
Grammarly scans text instantly and highlights errors or improvements with explanations.
Apply Corrections and Adjustments
Accept or ignore suggestions to refine your writing according to your style preferences.
LanguageTool
Access the Tool
Use the web editor, install a browser extension, or integrate via API depending on your workflow.
Input Text
Paste or type your text into the editor or supported platform.
Receive Suggestions
LanguageTool analyzes the text and highlights grammar, spelling, punctuation, and style issues.
Review and Apply Corrections
Review the suggestions and apply the ones that improve your writing.
Common questions
Yes, Grammarly offers a free version with basic grammar and spelling checks. Premium plans unlock advanced features.
LanguageTool supports over 20 languages including English, German, Spanish, French, Dutch, Russian, and more.
Grammarly requires an internet connection to process text and provide suggestions.
The desktop app offers offline functionality, but browser extensions and the web editor require an internet connection.
Yes, plagiarism detection is available in the Premium and Business plans.
Yes, the free plan has daily limits on the number of characters checked and fewer advanced suggestions.
Grammarly supports web browsers, desktop apps for Windows and Mac, Microsoft Office add-ins, and mobile apps for iOS and Android.
Yes, LanguageTool provides a REST API for developers to integrate grammar checking into custom software.
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