Threema Libre

Threema offers a range of features, including end-to-end encrypted messaging, voice and video calls, and file sharing, all designed with maximum confidentiality in mind. The platform is built on a zero-knowledge architecture, ensuring that only intended recipients can read messages, and metadata is reduced to the technical minimum. Threema Work provides comprehensive control over user permissions, while Threema OnPrem allows companies to self-host the messenger on their own infrastructure, maintaining full control over their data. With its open-source code and regular external security audits, Threema demonstrates its commitment to transparency and security. The platform is used by thousands of companies across various industries, including medium-sized businesses, international corporations, and military and healthcare facilities, and is available for a free 30-day trial with 30 users.