LanguageTool
A privacy-friendly, multilingual grammar and style checker for 30+ languages.
LanguageTool is a proofreading tool (LanguageTooler GmbH) covering grammar, punctuation and style across 30+ languages — the strongest non-English coverage of this group. It stands out for its open-source core, EU hosting and self-host options, and AI paraphrasing in Premium, making it the privacy-conscious pick.
Key features
- Grammar, punctuation and style in 30+ languages
- AI sentence paraphrasing (Premium)
- Personal style guide and dictionary
- Open-source core with self-hosting option
Pros
- Best multilingual coverage of the group
- Privacy-focused and self-hostable
- Cheapest long-term annual price
Cons
- Free tier character-limited (2,000)
- No free trial (money-back only)
- AI features less polished than Grammarly
Pricing
Free; Premium from ~US$4.99/mo (annual)
| Free | $0 |
| Premium | $19.90/mo |
| Teams | Custom |
Premium ~$4.99/mo billed annually ($59.88/yr) or $19.90 month-to-month; 14-day money-back, no trial. Free tier caps at 2,000 characters. Verified Jun 2026 (prices med-confidence — vendor widget failed to render).
Models
Proprietary + AI
Platforms
webdesktopbrowser-extworddocsmobileapi
Good for
AcademicCopywritingBlogging & SEO
LanguageTool appears in
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Last reviewed 2026-06-23. Categories: Grammar, Editing.