LanguageTool AI features and pricing (October 2026)

LanguageTool is a writing assistant that checks grammar, spelling, punctuation and style in more than 30 languages and rewrites sentences with AI. Individuals use the free version; companies add team dictionaries and style guides.

LanguageTool is operated by LanguageTooler GmbH in Hamburg; according to the data processing agreement, the contracting party for business customers is Learneo, Inc. in Redwood City, USA. Browser extensions exist for Chrome, Edge, Firefox, Opera and Safari, plus add-ins for Google Docs, Microsoft Word, Apple Pages and LibreOffice, integrations for Gmail, Outlook, Apple Mail and Thunderbird, and desktop apps. Premium adds more than 20,000 extra checks in seven languages, texts up to 150,000 characters and unlimited AI rephrasing. The Teams plan adds user management, a shared style guide and a team dictionary for 2 to 1,000 users. The data processing agreement lists hosting providers in Germany, the USA and Ireland; texts from the online editor and desktop app are stored with Amazon Web Services in the USA, and OpenAI generates alternative wordings.

• Rephrases sentencesThe AI paraphrasing feature offers alternative wordings for a sentence; free users get three a day, Premium users unlimited. Staff improve unclear passages in emails and documents without switching tools. According to the DPA, OpenAI is a subprocessor for this feature.
• Improves style and tonePremium suggests stylistic improvements and tone adjustments beyond pure error correction. Texts become clearer and more consistent, also in foreign languages.
• Checks many languages in one toolGrammar, spelling and punctuation checks cover more than 30 languages, including German, English, French, Spanish, Portuguese and Dutch. International teams use one tool instead of one per language.

• Strong coverage of German and other European languages, from a Hamburg-based company.
• Extensions for five browsers plus Office, email and desktop integrations.
• Public data processing agreement with a list of subprocessors, including Hetzner and Telekom in Germany and AWS and OpenAI in the USA.

LanguageTooler GmbH is based in Hamburg; according to the DPA, the contracting party for business customers is Learneo, Inc. in the United States.

The extension reads text in every field where it is active, so agree with IT on which apps it may run in. The data processing agreement is public; the processor is Learneo, Inc. in the USA, and transfers rely on the Data Privacy Framework and Standard Contractual Clauses, so check whether that fits the texts your staff write. Current prices were not displayed on the pricing page during our check in September 2026, so get a quote for your number of users.

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