The self-hosted communication solution for highest demands on security and confidentiality.
Threema has conducted an extensive study on messenger security among industry leaders.
More than 8,000 organizations and over 12 million people worldwide trust Threema for secure 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.
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.
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.
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, and a flexible infrastructure, Threema seamlessly adapts to any environment. Secure communication made in Switzerland.
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
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
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
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
Thanks to comprehensive whitelabeling options, the Threema OnPrem app can be fully customized to match the company’s corporate design. This ensures a consistent appearance across all communication channels.
App name: can be flexibly customized to the company
App icon: individual logo for easy recognition
Color scheme: seamlessly integrated into the corporate design
If a smartphone with the Threema OnPrem app installed is lost, an attacker could, in the worst case, gain complete access to the hardware and isolate the device from the network.
With the globally unique DualLock feature, app access can be blocked, keeping chat content encrypted and inaccessible to unauthorized persons. This ensures that sensitive data is reliably protected in all cases.
Companies often face the challenge of exchanging sensitive information securely, quickly, and easily with external contacts. Private messengers often seem to be the only solution, but they come with risks.
This is where EasyConnect comes in: The company creates an individual QR code and sends it to the external contact. The contact scans the code, opening a secure and confidential communication channel. No complicated registration or detours are necessary. This enables secure corporate communication seamlessly beyond the company’s own solution.
In large organizations, employees must be able to quickly and easily find and contact anyone in the company, regardless of department or location. At the same time, roles such as CEOs or department heads require special protection from unwanted inquiries.
With Circles, certain users or groups can be made visible or invisible to others. This keeps internal communication smooth and efficient, while consistently protecting privacy and maintaining hierarchies.
Threema OnPrem is designed for organizations and enterprises where confidentiality, control, and independence are top priorities:
Ministries, parliaments, administrative bodies
Police, judiciary, customs, intelligence services
Governments and international organizations
Rescue services and disaster relief agencies
Military units and command centers
Control centers, coordination units, crisis teams
Energy suppliers, telecommunications providers, infrastructure operators
Companies operating in high-security environments
Research institutions dealing with confidential data
When communication needs to be secure, organizations trust Threema. Whether for businesses, public authorities, or critical infrastructures: With Threema OnPrem, sensitive communication remains protected – intuitive, reliable and fully under your own control.
We’re happy to show you how Threema OnPrem can help your organization to secure internal communication at the highest level and ensure full data ownership.
