Grammarly vs LanguageTool: Which Grammar Checker Is Better in 2026?
Detailed Comparison 2026
Grammarly
AI writing assistant that masters grammar, tone, and content in 22 languages
LanguageTool
German AI grammar and style checker for 30+ languages — better than Grammarly in German
Overall Score
Grammarly
LanguageTool
83
Overall Score
85
Ease of Use
Features
Value for Money
AI Quality
Freemium
Pricing
Freemium
Our Verdict
Grammarly vs LanguageTool: The Comparison
Grammarly and LanguageTool are two leading grammar checkers, but they differ significantly in language support, privacy, and pricing.
Language Support
Grammarly specializes in English and offers no meaningful support for other languages. LanguageTool supports over 30 languages including German, French, and Spanish at a very high level.
Feature Depth for English
Grammarly is unmatched for English text: better tone detector, more style suggestions, superior plagiarism detection. Those writing exclusively in English should prefer Grammarly.
Privacy
LanguageTool offers a self-hostable version (Open Source) — a decisive advantage for privacy-sensitive companies. Grammarly is exclusively cloud-based.
Price
LanguageTool Premium costs ~$4/month — significantly cheaper than Grammarly Premium. The free version is also better.
Pros & Cons: Grammarly
Pros
- Delivers seamless, frictionless integration across more than 500,000 desktop applications and web browsers, allowing users to correct text directly within their active workflow.
- The recent expansion to support 22 languages empowers global teams to execute highly accurate grammar checks and structural rewrites in languages like German and French.
- Real-time feedback not only corrects errors but provides highly educational, transparent explanations for the underlying grammatical rules, actively improving long-term user skills.
- The generative AI capabilities drastically reduce the time spent overcoming writer's block by instantly drafting outlines, emails, and professional replies based on simple context prompts.
- The robust free tier provides exceptional ongoing value, equipping users with critical spelling, punctuation, and basic tone detection without requiring any financial commitment.
Cons
- Opting for the month-to-month billing cycle is prohibitively expensive ($30/month) compared to the significantly discounted $12/month annual commitment.
- Heavy reliance on the tool can inadvertently dilute a writer's unique voice, as the AI frequently suggests standardizing quirky or highly creative phrasing into generic, formal prose.
- Utilizing the generative AI features for academic or professional drafting carries the distinct risk of the final text being flagged by third-party AI detection software.
- The built-in plagiarism checker, while robust, is not entirely foolproof and occasionally fails to identify duplicated content from highly niche or newly published web sources.
- Some users report that persistent, real-time error highlighting can become visually distracting and interrupt the natural creative flow during intensive drafting sessions.
Pros & Cons: LanguageTool
Pros
- Best grammar and style checking in German — significantly outperforms Grammarly for German texts.
- Supports 30+ languages with linguistically deep rule sets.
- Broad platform integration: Google Docs, Word, Gmail, browser extensions, desktop apps.
- Open-source version available for self-hosted enterprise installations.
- More affordable than Grammarly Premium — €5.83/month annually for full features.
Cons
- Less mature AI writing than dedicated tools — no text generation feature.
- Grammarly is still stronger for English text style and tone analysis.
- Team management features less mature than enterprise solutions.
- Offline use only with self-hosted server or desktop app with limited features.
- No integration with Notion or Figma — only standard office tools.