LanguageTool is an open-source grammar and spell checker that supports over 30 languages. It detects errors in grammar, spelling, and style across web browsers, desktop applications, and Google Docs. The free version covers essential corrections; premium adds advanced checks.
| Pricing from | Free (Basic); £5.08/month (Premium) |
| Best for | Multilingual writers and those seeking budget-friendly grammar assistance |
| Website | www.languagetool.org |
Strengths and trade-offs
- Excellent multilingual support at a fraction of competitors' cost
- Open-source model with transparency and frequent community updates
- Grammar detection accuracy is sometimes lower than proprietary alternatives in English
- Browser extension and integration can be less seamless than established competitors
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