- Pick it if you are:
- Writers in German, French, Spanish, Dutch or Portuguese; Non-native English speakers writing in two languages
- Top complaint:
- LanguageTool browser extension is no longer free
- Price:
- Free plan, paid from $16.63/mo
- Pick it if you are:
- Students needing quick paraphrasing; Content marketers and SEO writers
- Top complaint:
- Free version limited to 125 words only
- Price:
- Free plan, paid from $19.95/mo
Score Comparison
Signals Comparison
LanguageTool
- LanguageTool browser extension is no longer free(9/10)
- Why is LanguageTool Premium so expensive monthly?(6/10)
- LanguageTool free version limits: 2,000 characters and 3 AI rephrases a day(6/10)
QuillBot
- Free version limited to 125 words only(8/10)
- Rigid no-refund policy frustrates paying users(8/10)
- Premium feels expensive at $100/year(6/10)
LanguageTool
- LanguageTool extension uses huge memory and crashes Firefox(8/10)
- LanguageTool slows LibreOffice with large documents(5/10)
QuillBot
- Slow performance and loading issues(6/10)
LanguageTool
- LanguageTool not working in Google Docs after updates(7/10)
- LanguageTool not working in Overleaf(6/10)
QuillBot
- Requires constant internet connection(5/10)
LanguageTool
- LanguageTool Word add-in suggestions don't apply(7/10)
QuillBot
- Word add-in buggy and unreliable(7/10)
LanguageTool
- LanguageTool keeps detecting the wrong language(5/10)
- LanguageTool less accurate than Grammarly for English(5/10)
- LanguageTool false positives and irrelevant suggestions(4/10)
QuillBot
- Paraphrasing sounds robotic and formal(6/10)
- Free version uses rare fancy synonyms(5/10)
- Paraphraser clumps separated text together(5/10)
- Technical writing gets context misinterpretations(5/10)
LanguageTool
- LanguageTool support slow, forum no longer monitored(6/10)
QuillBot
- Support is slow with no live chat or phone(7/10)
LanguageTool
- LanguageTool mobile keyboard limited, especially on Android(4/10)
QuillBot
No signals
LanguageTool
- Self-hosting LanguageTool to stay free takes work(5/10)
QuillBot
No signals
LanguageTool
No signals
QuillBot
- Plagiarism checker fails to detect AI content(7/10)
- AI detector gives false positives on human writing(6/10)
- False plagiarism accusations on original work(7/10)
Pricing Comparison
LanguageTool
Users: 1 user
Storage: 2,000 characters per text field
Limits: No browser extension, 2,000-character limit per check, 3 AI rephrases per day, limited style (Picky) checks, no personal style guide
Users: 1 user
Storage: 150,000 characters per text field
Users: 1 user
Storage: 150,000 characters per text field
Users: 1 user
Storage: 150,000 characters per text field
Users: 1 user
Storage: 150,000 characters per text field
Users: 2 to 1,000 users
QuillBot
Users: 1 user
Limits: 125 words at a time, No plagiarism checker, Only 2 paraphrase modes
Users: 1 user
Limits: No team features, Email-only support
Users: 1 user
Limits: Stuck for 6 months if issues arise, No prorated refunds
Users: 1 user
Limits: Locked in for full year, No team features
Users: Custom
Limits: Pricing not transparent, Requires sales call
Feature Comparison
| Feature | LanguageTool | QuillBot |
|---|---|---|
| Checking | ||
| Multilingual grammar and spell check Strongest outside English | ||
| Plagiarism checker Premium only | ||
| Core Features | ||
| Paraphrasing 8 modes, 125 words free limit | ||
| Grammar checking Free and Premium | ||
| AI content detector Premium only, 90%+ accuracy | ||
| Summarizer 1200 words free, unlimited premium | ||
| Translator 5000 character limit | ||
| Integrations | ||
| Browser extension Premium-only, or free with a self-hosted server | ||
| Google Docs add-on | ||
| Microsoft Word add-in Buggy, frequent issues reported | ||
| LibreOffice extension | ||
| Chrome extension Works on most sites | ||
| Google Docs integration Available | ||
| Mobile app Browser-based only | ||
| AI | ||
| AI paraphrasing 3 per day free, unlimited on Premium | ||
| Style | ||
| Personal and team style guide Premium / Teams | ||
| Privacy | ||
| Self-hosted server Open source, needs Java | ||
| Mobile | ||
| iOS keyboard Requires Full Access | ||
| Usability | ||
| Offline mode Requires internet | ||
| Pricing | ||
| Free tier 125 words only | ||
| Subscription pause Can pause without losing account | ||
| Team Features | ||
| Team plans Enterprise, contact sales | ||
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