Communication at the highest security level

The self-hosted communication solution for highest demands on security and confidentiality.

A Strong Foundation for Your Communication

All our Threema solutions are unique in their implementation, yet they are built on the same strong foundation. The three aspects of trust, transparency, and technology form the core of our philosophy and provide the basis for secure, reliable, and future-proof communication solutions.

Trust

Secure communication starts with trust. Threema protects your content through consistent end-to-end encryption – without requiring any personal information such as a phone number or email address. The principle of data minimization is at the core of our approach. Millions of users worldwide, both private individuals and businesses, rely on this security every day.

Transparency

If you promise security, you have to prove it. Threema is open source, undergoes regular independent audits, and fully complies with all GDPR requirements. Instead of tracking or hidden data usage in our applications, we rely on consistent data minimization and clear processes, ensuring full transparency.

Technology

Modern, powerful, and versatile: Threema relies on future-proof technology to enable stable, cross-platform communication – whether for private use, within organizations, or fully self-hosted. With Active Directory and MDM integration, APIs, APIs, and a flexible infrastructure, Threema seamlessly adapts to any environment. Secure communication made in Switzerland.

Protecting sensitive communication without compromise

Organizations with strict security requirements cannot afford to take risks with internal communication. The combination of proven security architecture and complete data sovereignty creates an independent chat environment – ideal for use in government agencies, industrial operations, the judiciary, and law enforcement.

• Self-hosted communication solution: a company-owned communication environment that provides the highest level of confidentiality
• Full data sovereignty and control: all information remains on your own servers – no cloud dependencies, no external data flows
• Digital sovereignty without compromise: no central storage of personal data

Holistic security architecture for maximum confidentiality

Threema OnPrem combines proven cryptography with a self-hosted deployment concept – enabling secure communication at the highest level and complete data control.

• Protection against cyber threats: isolated infrastructure protects against government trojans, targeted attacks, and espionage
• Highest compliance standards for public sector requirements: meets the strictest security regulations for handling classified information
• End-to-end encryption: all content is consistently encrypted
• Zero-knowledge architecture: effectively prevents surveillance and targeted attacks

Powerful features for secure and flexible communication

Threema OnPrem combines the familiar features and well-known administration interface of Threema Work with the security and control of a self-hosted system – with cross-platform compatibility on mobile devices and desktop computers.

• Network independence in crisis situations: operates even in case of public network failure – ideal for crisis management
• Customizable whitelabeling: Threema OnPrem can be tailored to your organization’s corporate design
• Closed system with no connection to external messaging networks: internal communication only, no third-party access
• Seamless integration into IT security infrastructures: no external services, full system control, individually adaptable
• Tailored configuration and central administration: admin portal with user management, permission control, security settings, usage statistics, MDM support, and BYOD compatibility
• Chat app features: one-on-one and group chats, voice and video calls, file sharing, polls, off-hours policy, and more

The right solution for security-critical infrastructures

Threema OnPrem is designed for organizations and enterprises where confidentiality, control, and independence are top priorities:

Public authorities and institutions with strict security requirements

• Ministries, parliaments, administrative bodies
• Police, judiciary, customs, intelligence services
• Governments and international organizations

Infrastructures requiring continuous operational readiness

• Rescue services and disaster relief agencies
• Military units and command centers
• Control centers, coordination units, crisis teams

Companies and organizations with internal IT infrastructure

• Energy suppliers, telecommunications providers, infrastructure operators
• Companies operating in high-security environments
• Research institutions dealing with confidential data