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LanguageTool is an open-source, AI-powered multilingual writing assistant designed to help users improve their texts by checking for grammar, style, spelling, and punctuation errors. It supports over 30 languages and dialects, offering real-time suggestions to enhance clarity, conciseness, and overall writing quality. LanguageTool is available as a browser extension for popular browsers like Chrome, Firefox, Edge, and Safari, as a desktop application for Windows and macOS, an app for iOS, an add-on for Google Docs and Microsoft Word, and via an API for integration into other services. It serves a diverse user base, from individual writers and students to professional organizations and businesses aiming for error-free and polished communication.
Serves as the central hub for LanguageTooler GmbH's operations, including core software development, product management, business strategy, marketing, and global team coordination for the LanguageTool service.
The headquarters is situated in Potsdam, a city known for its UNESCO World Heritage sites, including parks and palaces. While specific unique architectural details of the office itself are not publicly highlighted, it provides a modern and collaborative workspace for the Potsdam-based team members within a vibrant technological and cultural environment.
LanguageTool fosters a hybrid work culture. While many team members, including key developers and linguists, work remotely from various countries, the Potsdam office serves as a physical anchor for local staff and occasional team gatherings. The culture emphasizes open-source principles, linguistic precision, innovation, and a collaborative approach to enhancing the AI-powered writing assistant. There's a strong focus on work-life balance and empowering employees.
The Potsdam headquarters is significant as the registered legal seat of LanguageTooler GmbH and the operational center for its European activities. It underpins the company's commitment to the German and broader European market, adhering to regional business practices and robust data protection standards like GDPR. It also symbolizes the company's growth from an open-source project to a professional software provider.
LanguageTool supports users globally with its multilingual writing assistant available in over 30 languages and dialects. Its services are accessed by millions of individuals, educational institutions, and businesses worldwide through its website, browser extensions, desktop apps, mobile apps, and APIs. The company's team is also internationally distributed, with core members and freelance linguists contributing to development, linguistic rule creation, and customer support from various countries, reflecting a truly global operational model.
Karl-Liebknecht-Str. 1
Potsdam
Brandenburg
Germany
No additional office locations available.
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As of April 2025, LanguageTool' leadership includes:
LanguageTool has been backed by several prominent investors over the years, including:
No major publicly announced executive hires or exits have been identified for LanguageTool (LanguageTooler GmbH) in the last 12 months. The leadership team, including Managing Directors Dr. Daniel Naber and Stefan Klemm, appears stable and consistent in guiding the company's growth.
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LanguageTooler GmbH, the company behind LanguageTool, likely uses standard corporate email formats for its employees. While not publicly specified, a common pattern for tech companies in Germany is [first].[last]@[companydomain].com or [initials]@[companydomain].com. The primary domain for corporate communication appears to be languagetooler.com.
[first].[last]@languagetooler.com
Format
max.mustermann@languagetooler.com
Example
65%
Success rate
LanguageTool Blog • February 27, 2024
LanguageTool announced the launch of WriteRight, a new AI-powered feature designed to help users rephrase sentences, improve clarity, and adjust tone, further enhancing its suite of writing assistance tools....more
LanguageTool Blog • November 21, 2023
LanguageTool introduced a new Style Guide feature, enabling users and teams to create custom writing rules and maintain consistency across documents and communications....more
LanguageTool Blog • August 29, 2023
LanguageTool expanded its platform availability by releasing an official app for iOS, allowing iPhone and iPad users to access its powerful writing assistance features on the go....more
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