What Does LanguageTool Do?

Total employees33
HeadquartersPotsdam
Founded2017

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.

Where Is LanguageTool's Headquarters?

HQ Function

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.

Notable Features:

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.

Work Culture:

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.

HQ Significance:

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.

Values Reflected in HQ: The Potsdam HQ reflects LanguageTool's German roots, often associated with engineering quality, meticulousness, and reliability. Its operation within the EU framework also highlights a commitment to strong data privacy standards. The company's broader remote-first approach, complemented by this physical HQ, showcases values of flexibility, global talent acquisition, and trust in distributed teams to achieve a common goal.

Location:

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.

Street Address:

Karl-Liebknecht-Str. 1

City:

Potsdam

State/Province:

Brandenburg

Country:

Germany

Where Else Does LanguageTool Operate Around the World?

No additional office locations available.

Buying Intent Signals for LanguageTool

Highperformr Signals uncover buying intent and give you clear insights to target the right accounts at the right time — helping your sales, marketing, and GTM teams close more deals, faster.

Notable news
Hiring actively
Corporate Finance
Corporate Finance
Corporate Finance
Corporate Finance
Corporate Finance
*Example signal, not calculated in real time

Who's Leading LanguageTool? Meet the Executive Team

As of April 2025, LanguageTool' leadership includes:

Dr. Daniel Naber - Founder & Managing Director
Stefan Klemm - Managing Director

Who's Investing in LanguageTool?

LanguageTool has been backed by several prominent investors over the years, including:

High-Tech Gründerfonds (HTGF)

What Leadership Changes Has LanguageTool Seen Recently?

Hire0
Exits0

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.

What Technology (Tech Stack) Is Used byLanguageTool?

Discover the tools LanguageTool uses. Highperformr reveals the technologies powering your target accounts — helping your sales, marketing, and GTM teams prioritize smarter and close faster.

LanguageTool Email Formats and Examples

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

What's the Latest News About LanguageTool?

LanguageTool BlogFebruary 27, 2024

LanguageTool Introduces WriteRight: Its New AI Writing Assistant

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 BlogNovember 21, 2023

LanguageTool Launches Style Guide Feature for Consistent Writing

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 BlogAugust 29, 2023

LanguageTool Launches Official App for iOS Devices

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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