LanguageTool is an AI-powered writing assistant that helps users improve their grammar, style, and spelling in multiple languages, enhancing the quality of written communication.
LanguageTool is an AI-powered writing assistant that delivers comprehensive proofreading by detecting and correcting grammar, spelling, syntax, and style errors across more than 30 languages and dialects, ensuring polished and professional text. Its core value lies in combining rule-based precision with advanced AI for nuanced suggestions, including unlimited rephrasing in premium plans to enhance tone, fluency, formality, simplicity, or conciseness, plus features like Picky Mode for detecting redundancies, complex sentences, and overused words.[1][2][3][4][5] Key capabilities include real-time browser extensions for Chrome, Firefox, Edge, and Safari, seamless integrations with Google Docs, Microsoft Word, and other apps, double-click synonym suggestions, and detailed writing statistics tracking productivity, errors, and improvements.[1][2][5][7][8]
Ideal for multilingual professionals, students, non-native speakers, writers, and teams crafting reports, emails, or academic work, it supports use cases from everyday communication to long-form content like book chapters with high character limits up to 150,000.[2][9] What sets LanguageTool apart is its open-source foundation, distraction-free interface, privacy-focused client-side analysis, and superior multilingual support that outperforms many competitors, making it a versatile, affordable choice with free and premium tiers.[3][5][9]
Sources
LanguageTool explicitly states in its Terms of Service that user data is NOT used for AI training. The policy clearly co
No training on user data means no opt-out is necessary.
Low risk across data training, licensing, and sharing dimensions.
LanguageTool explicitly states in its Terms of Service that user data is NOT used for AI training. The policy clearly commits to not training artificial intelligence models on user content.
“[ToS] 'We do not use any of your User Content to train our artificial intelligence models.'”
The license granted is strictly limited to providing the LanguageTool Services. The company claims no rights beyond service delivery and explicitly states the license is for specific enumerated purposes only (providing service, compliance, and enforcement).
“[ToS] 'you give us a license (and permission) to use that User Content for the following purposes: (i) to provide the LanguageTool Services to you... (ii) to comply with applicable laws and regulations; and (iii) to enforce the Learneo policies...'”
While the DPA lists specific subprocessors with legitimate purposes (cloud hosting, analytics), the Privacy Policy indicates sharing with 'Service Providers' and 'Advertising Service Providers' with some vagueness. Subprocessors are listed but include third parties like OpenAI and Amplitude for analytics, creating moderate concern about data exposure.
“[DPA] 'All subprocessors currently used are set out in Appendix 3' and [Privacy] 'With Service Providers that help us operate our Services... Analytics providers that provide analytics on web traffic or usage of our Services'”
The Privacy Policy defers retention details to Part Two sections for specific services, which are not fully detailed in the provided documents. The DPA mentions deletion on request but lacks specific timeframes. Log files are deleted after 14 days per technical measures, but overall retention policy is vague.
“[Privacy] 'We will retain your personal data as described in the applicable Part Two section for the relevant Service you are using' and [DPA] 'log files are deleted after 14 days'”
The Terms of Service grant LanguageTool only a limited license to use content for service delivery purposes. The company does not claim ownership of outputs or any rights beyond providing the service. Users retain ownership of their content.
“[ToS] 'you give us a license (and permission) to use that User Content for the following purposes: (i) to provide the LanguageTool Services to you'”
The DPA demonstrates GDPR compliance with detailed technical and organizational measures (Appendix 2), Data Privacy Framework certification mentioned in Privacy Policy, and appointment of a Data Protection Officer. However, no SOC 2 Type II, ISO 27001, or HIPAA certifications are explicitly mentioned in the provided documents.
“[DPA] 'Appointment of a data protection officer' and [Privacy] 'we are certified and comply with the EU-U.S. and Swiss-U.S. Data Privacy Frameworks'”
Track and measure your AI tools with Olakai's observability platform.
Explore Olakai