On-Premises
OChK
Threema OnPrem as Part of the Managed Services Offering
More than 8,000 organizations and over 12 million people worldwide trust Threema for secure communication.
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.
Take full control over your communications: Threema OnPrem secures your internal network and enables operation in a fully isolated air-gapped environment for highly sensitive information.
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
SecureShare makes sharing files easy, flexible, and secure. Large files can be transferred effortlessly, without being constrained by traditional size limits or compromising on security. Thanks to end-to-end encryption, your data remains protected and is accessible only to the intended recipients.
As a self-hosted solution, SecureShare is designed specifically for enterprise customers. It runs on your infrastructure, giving you full control over your data. At the same time, the module integrates seamlessly with Threema Work and Threema OnPrem, offering a familiar and intuitive user experience.
With features such as centralized file management, external sharing links, and granular access rights, SecureShare is a reliable and scalable solution for secure file sharing in enterprises.
The conferencing feature enables secure, hassle-free meetings, even with external participants. Group calls can be started directly within the familiar messenger interface, while external participants can easily join via a link in their browser without needing to download the app.
All calls are end-to-end encrypted and accessible only to participants who have an invitation link. Since online meetings are initiated and conducted directly within Threema Work or Threema OnPrem, there is no need to switch to an additional tool with an unfamiliar interface.
With features such as a waiting room and moderator-controlled participant admission, the conferencing feature provides a secure and flexible solution for collaboration, both within the company and with external participants.
In day-to-day work, knowing whether someone is available is often crucial. However, many communication processes lack this transparency, leading to unnecessary waiting times, delayed responses, and inefficient workflows.
The availability status in Threema Work and Threema OnPrem solves this problem by displaying availability directly in the chat. Employees can easily set their status to “Unavailable” or “Busy”, or create a custom status to signal whether they are available or prefer not to be disturbed.
This makes team communication noticeably more efficient: colleagues can better judge the right time to reach out while respecting periods of focused work. The result is fewer interruptions, clearer expectations, and a more productive workday.
Create your own app design.
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
Block app access remotely.
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.
Communicate with contacts outside the company.
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.
Determine who can be found in the contact list.
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 TrustCircles, 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.
Connect your preferred AI directly to Threema OnPrem.
Artificial intelligence has become part of everyday working life. However, if a company’s internal AI solution is not easily accessible, employees often turn to unverified and uncontrolled tools instead. This is exactly where AiBridge comes in: it connects your preferred AI directly to Threema Work or Threema OnPrem. Whether you use public providers such as OpenAI or Anthropic, or your own solution running on Azure or AWS, AiBridge enables employees to use the company-approved AI securely – anytime and anywhere – without leaving their familiar messaging environment or relying on a VPN connection. This ensures that AI is seamlessly and securely integrated into everyday work while remaining fully under your organization’s control.
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.
