Grammarly vs 
LanguageTool
Head-to-head comparison of Grammarly and LanguageTool. Pricing, multilingual support, AI features, and a clear verdict for writers and teams.
Last updated February 18, 2026
AI Polish vs. Multilingual Reach
Grammarly is an AI-first writing copilot built for English. GrammarlyGO generates, rewrites, and adjusts tone contextually. It's the smoothest real-time correction experience available — always on, always inline, across 500K+ apps. If you write primarily in English and want generative AI that matches your voice, nothing beats it.
LanguageTool is a multilingual powerhouse built on open-source principles. It natively supports 30+ languages with the same depth of grammar checking — not just translation. The self-hosted option gives you full control over sensitive content. At $4.99/mo, it's the best value for non-English writers or privacy-conscious teams.
Performance Scores
Feature Breakdown
| Feature | Grammarly | LanguageTool |
|---|---|---|
| Real-time Browser Corrections | Excellent, inline everywhere | Good but occasional lag |
| Multilingual Support | English only | 30+ languages natively |
| AI Generative Writing | GrammarlyGO (1K prompts/mo) | None |
| Self-Hosting / Privacy | ❌ No | Full self-hosted option |
| Free Tier Character Limit | Unlimited checks | 10,000 chars per check |
| Premium Price (Annual) | $12/mo | $4.99/mo |
| Plagiarism Detection | ✅ Yes | ❌ No |
Pricing Showdown
AI-powered writing assistant for clear communication
Open-source grammar checker supporting 30+ languages
Pros & Cons
Pros
- • Seamless everywhere — browser extension works inline in virtually any text field without switching tools
- • GrammarlyGO is context-aware and reads surrounding text to match your writing style
- • Extremely polished UX with zero learning curve for non-technical users
Cons
- • Premium costs $12/mo annually but no monthly option — you're locked into a yearly commitment
- • Limited deep style analysis — lacks the 20+ reports long-form writers need
- • AI prompt cap of 1,000/month feels restrictive for power users
Pros
- • Genuinely multilingual — native support for 30+ languages, not just English translation
- • Privacy-focused with self-hosting option for sensitive documents
- • Extremely affordable at $4.99/mo annual — less than half of Grammarly Premium
Cons
- • AI features are minimal compared to GrammarlyGO — no generative writing assistant
- • Browser extension is less polished — occasional lag and UI inconsistencies across platforms
- • Free tier limit of 10,000 characters per check requires copy-paste for longer documents
The Bottom Line
Choose Grammarly if you write primarily in English and want AI-powered rewrites and tone adjustments. GrammarlyGO is miles ahead for generative features. The premium experience justifies the cost if English is your main working language.
Get Grammarly →Choose LanguageTool if you write in multiple languages, need self-hosted privacy, or want 60% cost savings. The open-source core and native multilingual support make it the only real choice for non-English content.
Get LanguageTool →