LanguageTool
An open-source multilingual grammar, style and spell checker from a German company, covering more than 30 languages.
LanguageTool is a grammar, style and spell checking service developed by LanguageTooler GmbH, headquartered in Potsdam, Germany. Its core engine is open source, and the product is offered as a web editor, browser extensions and integrations for office and writing tools.
LanguageTool checks more than 30 languages, catching grammar, spelling, punctuation and style issues, with a free tier and an affordable Premium plan that adds advanced style suggestions and longer texts. As a German company with an open-source core and EU data-protection compliance, it is a leading European alternative to Grammarly for multilingual writers.
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