Login Threema Work Threema Broadcast Threema Gateway en English Deutsch Français Español About us Why Threema Security and Privacy as the Cornerstones of Digital Communication Privacy Privacy Without Compromise Security Zero-Knowledge Security and Legal Compliance Products Threema Work Threema OnPrem Threema Private Solution Use Cases WhatsApp Alternative MS Teams Alternatives C-Level Communication Managing Shadow IT Fast Internal Communication via Messenger Mobile Workforce Business Continuity: Out-of-Band Communication One-to-Many Communication GDPR-Compliant Communication Strengthen Cyber Resilience: NIS2, DORA, and CER Success Stories Mercedes-Benz Group AG EDEKA City of Frankfurt am Main Bavarian State Ministry of Justice TK Elevator Success Stories Industries Public Institutions Government Emergency & Bluelight Healthcare Education Financial and Insurance Sectors Resources Blog Messenger Interoperability: Well-Intended, but Bad for Data Privacy Easier Tag Management in the Management Cockpit World Emoji Day: Our Emoji Pet Peeves What We’re Working On Anonymity at the System Level – The Ultimate Privacy Protection Blog FAQ Threema Private Threema Work Threema Broadcast Support Request Whitepapers Cryptography Whitepaper Secure Messaging in Public Authorities Business Continuity Management Comparison of Business Messaging Solutions WhatsApp Alternative for Businesses European Cybersecurity Regulations: NIS2, DORA, and CER The Challenge of Cybersecurity Study: Cybersecurity and Communication Tools Quicklinks Events Webinars Partner NEW Documents Download Pricing Login Threema Work Threema Broadcast Threema Gateway Get Started en English Deutsch Français Español Why Threema? Security Zero-Knowledge Security and Legal Compliance Threema protects confidential information, avoids metadata, and is GDPR-compliant – “Security by Design” is our philosophy. Consistent End-to-End Encryption Threema relies on robust end-to-end encryption based on open-source encryption technology to protect all communication. Unlike many other messaging services, Threema not only provides end-to-end encryption for text and voice messages, media, and calls, but also for profile pictures, group names, and the list of group members. More about encryption Regular Audits Threema is regularly subjected to comprehensive audits by recognized security experts. For instance, the renowned company Cure53 conducted a thorough security audit of the mobile apps in October 2020, and in January 2024, the new desktop app was examined. Additionally, German researchers confirmed the robustness of Threema’s communication protocol Ibex with a formal security proof in July 2023. More about security audits Legal Compliance and Adherence to EU Regulations Threema is GDPR-compliant and meets all European data protection requirements. Furthermore, Threema is subject to the strict Swiss Federal Act on Data Protection (FADP). Unlike many US services, Threema is not subject to the CLOUD Act. The business messenger helps EU companies meet the requirements of NIS2, DORA, and CER. With its own servers in an “ISO 27001”-certified data center in Zurich, comprehensive data security is ensured. Privacy-compliant communication Open Source To ensure full transparency, the source code of the Threema apps is publicly accessible. However, you don’t have to take our word for it: thanks to Reproducible Builds (on Android), you can verify for yourself that the published code matches the one underlying the apps in the app stores. More about open source Test Now for Free Try Threema Work for 30 days with 30 users – no payment details required, no automatic renewal! Test for free About us Why Threema Privacy Security Products Features Lighthouse Threema Work Threema Private Threema OnPrem Threema Gateway Downloads Threema Work Threema OnPrem Threema Private Use Cases WhatsApp Alternative Complement to MS Teams C-Level Communication Fast Internal Communication via Messenger Mobile Workforce Business Continuity: Out-of-Band Communication One-to-Many Communication GDPR-Compliant Communication Strengthen Cyber Resilience: NIS2, DORA, and CER Comparison of Private Messenger Comparison of Business Messenger Industries Public Institutions Manufacturing Healthcare Retail Tourism / Hospitality IT Education Police / Armed Forces And many more Resources Success Stories Blog FAQ Support Events App Configuration Status How to activate Threema Work Changelog Company Open Source Transparency Report Jobs Fan Shop Business Inquiries Contact Press Newsletter Privacy Policy Legal Notice Data Processing Agreement Pricing Overview Get started Follow us Made in Switzerland © 2026 Threema AG.