LanguageTool
AI-powered grammar, spelling and style checker for 30+ languages, with a strong DACH and EU-privacy focus.
Category: Content & SEO · Editing & paraphrasing
Features
LanguageTool is a grammar and spell checker available as a browser add-on, desktop app, and API. The free plan checks up to 2,000 characters per text field; Premium raises this limit to 150,000 characters and unlocks unlimited AI rewriting.
The browser extension does not run purely locally: its default configuration sends text to a server for checking. Review the settings and privacy information before entering confidential content. Teams can define shared writing rules through a style guide.
- Grammar and spell check up to 2,000 characters on the free plan
- Premium: up to 150,000 characters per text field
- Unlimited AI sentence and text rewriting from Premium
- Team style guide for consistent corporate language and writing conventions
- Browser add-on for Chrome, Firefox, Edge, Safari, and other browsers
- The browser extension's default configuration sends text for server-side checking
Prices and plans
| Tier | Price | Period | What you get |
|---|---|---|---|
| Kostenlos | free | - | Grammar/spelling check up to 2,000 characters 3 AI rewrites per day |
| Premium Monatlich | Not verified for this market | Month | Up to 150,000 characters Unlimited AI paraphrasing |
| Premium Jaehrlich | Not verified for this market | year | Same as Premium Monthly |
| Teams (2 seats) | Not verified for this marketAnnual total for 2 seats in the configurator; larger teams have different prices, VAT included | year | All Premium benefits Team style guide |
| Premium (quarterly) | Not verified for this market | quarter | Up to 150,000 characters Unlimited AI paraphrasing |
| Premium (2 years) | Not verified for this market | 2 years | Up to 150,000 characters Unlimited AI paraphrasing |
Limits
Free LanguageTool checks up to 2,000 characters per text field and allows 3 AI rewrites daily. Premium raises the text-field limit to 150,000 characters and offers rewrites without a quantity limit. Monthly, quarterly, annual, and two-year billing are available. Team prices depend on the selected seat count; a team annual total is not a monthly per-user price.
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FAQ
Is LanguageTool available for free?
Yes. A permanently free plan is published, not a time-limited trial.
Where is LanguageTool's vendor based?
LanguageTooler GmbH (Potsdam/Berlin), seit 2023 Teil von Learneo, Inc. (USA), based in Germany. For data processing and privacy terms the vendor's own contract governs.
How is LanguageTool billed?
Premium: EUR 19.90 monthly or EUR 59.89 annually; up to 150,000 characters per text field. Quarterly, two-year, and team options are separate.
Is LanguageTool still active?
Live-checked against the official vendor page.
How many plans are documented for LanguageTool?
The catalog documents 6 plans with price, billing period, and included features.
Which use case is LanguageTool categorized for?
LanguageTool is listed in the catalog under “Content & SEO.”
Where do the details about LanguageTool come from?
Prices, limits, and product details are documented against the listed official vendor page.
How we compare
We compare free access, paid entry, plan limits, features and the listed official sources. Unsourced figures stay marked as not published.
Only confirmed entries appear in the catalog. Prices, plans and limits come from listed official vendor pages. Missing figures stay marked as not published. Result lists are alphabetical by default and can be switched to Free access first; neither is a quality ranking. The vendor page always wins.
Edited and checked by the AI Compare team
Sources
- https://languagetool.org/
- https://languagetool.org/legal
- https://languagetool.org/premium
- https://languagetool.org/es/premium
- https://languagetool.org/legal/privacy
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