Guardyn

Self-hostable, post-quantum end-to-end encrypted messenger for desktop and mobile.

Mobile appfreeglobal

Guardyn is a free, open-source private messaging app with post-quantum end-to-end encryption, encrypted group calls, and sealed sender. It's available as mobile apps for iOS/Android and a desktop app, and is self-hostable and Kubernetes-native so organizations can run their own infrastructure. It's aimed at privacy-focused individuals and organizations who want an alternative to mainstream messengers with independently verifiable, post-quantum-ready encryption.

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Problem & pain-point mapping
Who we surface it to (audience fit)
What it's a strong alternative to
Trust & credibility signals

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