LanguageTool
LanguageTool: A broad multilingual checker with open-source and self-hosting options. Ranked #2 of 88 in Grammar Checkers by our editors (9.2/10); pricing: Free plan; best for multilingual users and self-hosted deployments.
At a glance
- Editor score9.2 / 10
- PricingFree plan
- Best forMultilingual users and self-hosted deployments
- Free planYes
- Tone detectionYes
- Founded2003 · San Francisco, California, United States
- Facts checked22 Sep 2026
Where it wins
- Supports grammar, punctuation, style, and paraphrasing in 31 languages
- Works across web, desktop, mobile, office apps, browsers, and APIs
- Open-source core with a self-hosted LanguageTool server option
Where it doesn't
- Premium Monthly costs €19.90 per user per month
- Team pricing is limited to up to 20 users
- Advanced features are concentrated in paid plans
Our verdict on LanguageTool
LanguageTool is a multilingual writing assistant for individuals, professionals, teams, and developers. It checks grammar, spelling, punctuation, and style through a web editor, browser extensions, desktop applications, mobile software, office integrations, and APIs. Its feature set also includes AI sentence paraphrasing, personal dictionaries, personal style guides, Picky Mode, and browser-based real-time checking. With support for 31 languages, an open-source core, and a self-hosted server option, it is particularly suited to multilingual users and organizations that want deployment flexibility.
The published plans cover free access and three paid options. Premium Monthly costs €19.90 per user per month and includes premium grammar, punctuation, and style checking, a browser add-on, a Personal Style Guide, and AI sentence rephrasing. Premium Annual costs €59.89 per user per year and adds all languages and dialects, a Personal Dictionary, and a Personal Style Guide alongside premium checking. Team costs €56.90 per user per year for up to 20 users, with team subscriptions and annual per-user pricing. The annual Premium plan displays €4.90 per month when billed annually.
LanguageTool fits a varied writing stack: integrations include Google Docs, Microsoft Word, Apple Pages, LibreOffice, Gmail, Apple Mail, Outlook, and Thunderbird. Windows, macOS, iOS, Chrome, API access, and self-hosting extend that reach beyond a single editor. The Proofreading API supports developer workflows, while the self-hosted LanguageTool server provides an option for organizations managing their own deployment. Choose it for broad language coverage, personal style controls, and ecosystem flexibility. Consider another grammar checker if your priority is a higher Team user limit or a lower-cost premium monthly plan.
Your product? Our editors can test LanguageTool in depth and publish a review, labelled as paid · from $149/mo →
LanguageTool pricing
All 6 LanguageTool plans and prices →
LanguageTool fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Not verified |
| Browser extension | Yes |
| Desktop app | Yes |
| Mobile app | Yes |
| Style suggestions | Yes |
| Tone detection | Yes |
| Languages supported | 31 |
| Money-back guarantee | 14 days |
| Deployment | Cloud, Self-hosted, Desktop, Mobile, Browser extension |
| Platforms | Web, Windows, macOS, iOS, Chrome extension |
| Compliance & security | GDPR |
| Support | Email, Live chat, Docs |
| Built for | Solo, Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 11 integrations: Google Chrome, Mozilla Firefox, Microsoft Edge, Safari, Opera, Microsoft Word … See all → |
| Pricing | Free plan (source) |
| Website | languagetool.org |
| Facts checked | 22 Sep 2026 |
LanguageTool integrations
LanguageTool lists 11 integrations on its own site.
- Google Chrome
- Mozilla Firefox
- Microsoft Edge
- Safari
- Opera
- Microsoft Word
- Google Docs
- LibreOffice
- Gmail
- Apple Mail
- Thunderbird
See all LanguageTool integrations →
Alternatives to LanguageTool
- GrammarlyA broad writing assistant with strong grammar, tone, rewriting, and AI coverage.9.4
- Microsoft EditorA strong Microsoft 365 writing assistant with focused platform coverage.9.0
- GingerA cross-device English writing assistant with a free plan and paid rephrasing and translation tools.8.8
See all LanguageTool alternatives →
LanguageTool vs the competition
- LanguageTool vs Grammarly
- LanguageTool vs Microsoft Editor
- LanguageTool vs Ginger
- LanguageTool vs ProWritingAid
- LanguageTool vs Scribbr Grammar Checker
- LanguageTool vs Sapling
Compare LanguageTool with any tool side by side →
Also Ranked In
LanguageTool is ranked in 9 of our directories; the 6 strongest besides Grammar Checkers.
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The editor score above is our own research. What this page doesn't have yet is a reader's view — what you used LanguageTool for, what worked and what didn't. No stars are seeded and no review is paid for; an editor reads every one before it appears.
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Featured on iTechGuides
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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