LanguageTool review
A broad multilingual checker with open-source and self-hosting options.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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.
LanguageTool pros and cons
- 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
LanguageTool fact sheet, pricing and score →
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