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Threema OnPrem is a self-hosted, company-owned secure messaging solution that enables organizations to run a confidential, on-premises chat environment with full data sovereignty. It provides end-to-end encryption, zero-knowledge architecture, and data minimization to meet GDPR and Swiss data protection requirements, with no cloud dependencies. The platform is designed for high-security contexts (public sector, judiciary, critical operations) and integrates with enterprise infrastructure (AD/MDM, APIs) while isolating against cyber threats.
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