Grammarly vs LanguageTool: Grammar Checkers Compared
Grammarly is the best English grammar assistant with superior accuracy, tone detection, and AI writing features. LanguageTool supports 30+ languages, costs less than half the price, and offers an open-source core with self-hosting options for privacy. Choose Grammarly for the most polished English writing experience; choose LanguageTool for multilingual support, affordability, or privacy-first self-hosting.
| Feature | Grammarly | LanguageTool |
|---|---|---|
| Type | AI writing assistant | Multilingual grammar checker |
| Free Tier | Yes (basic grammar) | Yes (20,000 chars/check) |
| Pro Price | $12/mo (annual) | $4.99/mo (annual) |
| Languages | English only | 30+ languages |
| Grammar Accuracy | Excellent (English) | Very good (multilingual) |
| AI Writing | Yes (GrammarlyGO) | Yes (AI rewriting) |
| Tone Detection | Yes | Limited |
| Open Source | No | Core engine is open source |
| Privacy | Cloud processing | On-premise option available |
| Browser Extension | All major browsers | All major browsers |
| Office Integration | Google Docs, MS Office | Google Docs, MS Office, LibreOffice |
| Crypto Payment | Card only | Card only |
Disclosure: Some links on this page may be affiliate links. We may earn a commission if you make a purchase through these links, at no additional cost to you.