LanguageTool: what it does, who it is for and alternatives
Updated · By Robert Breen
A multilingual grammar and style checker that works in more than 30 languages. Browser and Office add-ins.
Official site: languagetool.org
What LanguageTool does
LanguageTool checks spelling, punctuation, casing and style, and its paraphrasing tool rewrites sentences to be more formal, simple or concise. It plugs into Gmail, Outlook, Google Docs, Microsoft Word and the major browsers, and has desktop apps for Windows and macOS. Companies can use team accounts and a proofreading API.
Who LanguageTool is for
- Executive assistants
- Customer support agents
- Marketing coordinators
- Account managers
Key features
- Grammar, punctuation, casing and style checks
- AI paraphrasing for formal, fluent, simple or concise wording
- Personal dictionary and a Picky Mode for stricter checks
- Add-ons for Gmail, Outlook, Google Docs and Word
- Team accounts and a proofreading API
Privacy and data
LanguageTool says it does not use LanguageTool user inputs to train its language models by default, and that team plans are covered by a data processing agreement. Source: LanguageTool’s own page. Before you put client data in, check your company’s AI rules and the plan’s data settings.
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- Guide: Grammarly alternatives
Alternatives to LanguageTool
Other AI writing tools in the directory.
- DeepL Free plan AI translation for text and whole files that keeps a document's original formatting, images and fonts, plus DeepL Write to polish your wording. Glossaries keep key terms consistent.
- Grammarly Free plan Checks grammar, tone and clarity everywhere you write, and drafts or rewrites text with AI. Works in email, docs and the browser.
- Jasper Free trial An AI writing platform for marketing teams that keeps every draft on brand. Campaign, blog and ad copy with brand voice controls.
- Copy.ai Free plan AI writing and workflows for sales and marketing copy, from emails to product pages. Run the same content process across many items.
- Writesonic Free trial AI writing and SEO tools for blog posts and landing pages, plus tracking of how AI search mentions your brand.
- Wordtune Free plan Suggests rewrites to make sentences shorter, clearer or more formal. Good for polishing emails and reports.
Frequently asked questions
- What is LanguageTool?
- A multilingual grammar and style checker that works in more than 30 languages. Browser and Office add-ins. LanguageTool checks spelling, punctuation, casing and style, and its paraphrasing tool rewrites sentences to be more formal, simple or concise. It plugs into Gmail, Outlook, Google Docs, Microsoft Word and the major browsers, and has desktop apps for Windows and macOS. Companies can use team accounts and a proofreading API.
- Who is LanguageTool for?
- LanguageTool fits executive assistants, customer support agents, marketing coordinators and account managers, and other office teams with the same job to do.
- Is LanguageTool free?
- LanguageTool has a free plan; paid plans add more usage or features. Plans change often, so check the official pricing page before you commit.
- What are some alternatives to LanguageTool?
- Other AI writing tools include DeepL, Grammarly, Jasper, Copy.ai and Writesonic.
- Is LanguageTool safe for work data?
- LanguageTool says it does not use LanguageTool user inputs to train its language models by default, and that team plans are covered by a data processing agreement. Check your own company’s rules, and use a business plan with training turned off for client data.
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Checked against LanguageTool’s official site on October 20, 2026: source 1, source 2. Spotted something out of date? Email rbreen@ynteractive.com. Listings are free; submit your AI tool.
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