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LanguageTool
Open-source grammar, style, and spell checker.
⭐ 4.2/5Free Tier AvailableOpen SourceFounded 2003
About LanguageTool
LanguageTool is an open-source writing assistant that supports over 30 languages. It offers grammar checking, style suggestions, and spell checking through browser extensions, desktop apps, and API. Being open source, it can be self-hosted for privacy-conscious users.
Key Features
✓Grammar checking
✓Style checking
✓30+ languages
✓Browser extension
✓API
✓Self-hosting
✓Personal dictionary
✓Picky mode
✓Add-ins
✓Rephrasing
Pros & Cons
👍 Pros
- ✓Open source
- ✓Multi-language
- ✓Self-hostable
- ✓Affordable
👎 Cons
- ✗Less accurate than Grammarly
- ✗Limited AI features
- ✗Smaller ecosystem
- ✗Basic free plan
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