Threema

Threema is a highly secure messaging platform developed in Switzerland. It provides end-to-end encrypted exchange of messages, calls, and files, designed for individuals, businesses, and public sector needs, with GDPR compliance. The solution emphasizes data sovereignty with private usage options (Threema Private), enterprise offerings (Threema Work), and self-hosted deployments (Threema OnPrem).

• End-to-end encryption for messages, calls, and files, with Perfect Forward Secrecy
• Zero-knowledge architecture: content readable only by the recipients, not by Threema
• Anonymity: no phone number or email required; unique Threema ID
• Minimal metadata; messages deleted from servers after delivery; contact lists stay on devices
• Open source with regular independent audits and reproducible builds
• GDPR compliant; Swiss data protection standards; no advertising or tracking
• Enterprise options: Threema Work (central admin, MDM integration, API access) and OnPrem for self-hosting
• Cross-platform support: mobile apps and desktop/web clients; group chats, voice/video calls, file sharing, polls
• Additional enterprise features: centralized user management, privacy controls, and optional add-ons

• Privacy-first by design: data minimization and no requirement for personal identifiers
• Strong security: end-to-end encryption, zero-knowledge, and Open Source transparency
• GDPR compliance and Swiss data protection excellence
• Open-source code and regular external security audits
• No ads or data trading; independent business model
• Data sovereignty options: self-hosted OnPrem and private deployments with Swiss hosting
• Practical for both individuals and organizations seeking secure collaboration

Private (Individuals): CHF 6.00 / EUR 6.00 / USD 6.00 (one-time) Core (Businesses, up to 200 employees): CHF 3.00 / EUR 3.00 / USD 3.00 per user per month Professional (Businesses, unlimited users): CHF 5.00 / EUR 5.00 / USD 5.00 per user per month OnPrem: Custom pricing (self-hosted, data sovereignty)