- 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:
- Fiction authors and novelists; Budget-conscious freelance writers
- Top complaint:
- Word add-in crashes and freezes Word
- Price:
- Free plan, paid from $30/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)
ProWritingAid
- Free version limited to 500 words(6/10)
- Premium $30/month feels expensive(6/10)
- Refunds only within 3 days of purchase(6/10)
- Plagiarism checks cost extra on every ProWritingAid plan(5/10)
LanguageTool
- LanguageTool extension uses huge memory and crashes Firefox(8/10)
- LanguageTool slows LibreOffice with large documents(5/10)
ProWritingAid
- Word add-in crashes and freezes Word(9/10)
- Struggles with large documents over 800 words(8/10)
- Plagiarism checker extremely slow(6/10)
LanguageTool
- LanguageTool not working in Google Docs after updates(7/10)
- LanguageTool not working in Overleaf(6/10)
ProWritingAid
No signals
LanguageTool
- LanguageTool Word add-in suggestions don't apply(7/10)
ProWritingAid
- Chrome extension doesn't work on many websites(7/10)
- Scrivener integration loses changes(8/10)
- Gmail and email integration unreliable(5/10)
- ProWritingAid Word add-in no longer works on Mac(6/10)
- ProWritingAid not working in Google Docs(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)
ProWritingAid
- Inconsistent detection and false positives(7/10)
- Steep learning curve with overwhelming reports(5/10)
- Cannot save grammar preferences(6/10)
- Mishandles dialogue tags and creative writing(6/10)
LanguageTool
- LanguageTool support slow, forum no longer monitored(6/10)
ProWritingAid
- No live chat or phone support(5/10)
LanguageTool
- LanguageTool mobile keyboard limited, especially on Android(4/10)
ProWritingAid
No signals
LanguageTool
- Self-hosting LanguageTool to stay free takes work(5/10)
ProWritingAid
No signals
LanguageTool
No signals
ProWritingAid
- AI rephrasing triggers plagiarism detection(9/10)
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
ProWritingAid
Users: 1 user
Storage: Unlimited document storage is a Premium feature
Limits: 500 words checked at a time, 2 runs per report per day, 10 Rephrases/day, 3 Sparks/day, no Chapter Critique, no custom style guide or custom dictionary, no plagiarism checks
Users: 1 user
Limits: Only 1 Chapter Critique per day; plagiarism checks not included
Users: 1 user
Limits: No plagiarism checker, No priority support
Users: 1 user
Limits: No plagiarism checker, Standard support only
Users: 1 user
Limits: Extra cost is mostly AI critique quotas and community access, not better grammar checking
Users: 1 user
Limits: Plagiarism checks not included
Users: 1 user
Limits: Plagiarism checks not included
Feature Comparison
| Feature | LanguageTool | ProWritingAid |
|---|---|---|
| Checking | ||
| Multilingual grammar and spell check Strongest outside English | ||
| Plagiarism checker Premium Pro only, slow and limited | ||
| Core Features | ||
| Grammar checking 91% accuracy in testing | ||
| Style suggestions 25+ writing reports | ||
| Integrations | ||
| Browser extension Premium-only, or free with a self-hosted server | ||
| Google Docs add-on | ||
| Microsoft Word add-in | ||
| LibreOffice extension | ||
| Microsoft Word integration Buggy, crashes on large docs | ||
| Google Docs integration No Pageless mode support | ||
| Scrivener integration Loses changes, requires app closed | ||
| Chrome extension Doesn't work on all sites | ||
| Desktop app Windows and Mac | ||
| Mobile app No native mobile app | ||
| AI Features | ||
| AI rephrasing May trigger AI detection | ||
| 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 Desktop app only, limited features | ||
| Team Features | ||
| Team collaboration Basic team plans available | ||
| Pricing | ||
| Lifetime plan $399 Premium, $699 Premium Pro | ||
| Free tier 500 words only, very limited | ||
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