Letro Tech GmbH

Letro is a Swiss next‑gen ultra secure formal communication solution for enterprises, institutions and governments. Our core product, LetroLetters, enables end‑to‑end encrypted, verifiable formal communications, designed for high‑stakes, regulated workflows where proof, integrity and auditability matter (e.g., banking, healthcare, public sector). We also develop a Digital ID capability (“PostNumber”) for identity proofs and secure delivery; each digital ID will be issued via secure passport NFC scan under 60 seconds.

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