About Human Sender
Building the trust layer for human communication
Every digital channel is becoming untrustworthy. We are building the protocol that puts proof of human authorship back into every message, call, and meeting.
€10
Cost to clone any voice
30 seconds of LinkedIn audio is enough.
$25M
Wired to a deepfaked CFO
Arup, Hong Kong, February 2024.
65%
Cold emails hit spam or are ignored
Inboxes have stopped trusting strangers.
The problem
Every channel is broken
Voice clones can be created from 30 seconds of audio. Real-time video deepfakes run on consumer laptops. AI writes phishing emails more convincingly than most humans. Cold emails go to spam at over 65% false-positive rates because inboxes have lost faith in strangers.
Arup, Feb 2024
Finance worker wired $25M to fraudsters after a video call with a deepfaked CFO on Teams.
Ferrari, 2024
CEO impersonated on WhatsApp to senior executives using a real-time voice clone.
WPP CEO, 2024
Mark Read deepfaked on a Teams call. Voice clone combined with publicly available footage.
Our approach
Proof of effort — not just identity
The real problem is not detecting fake media. It is a missing protocol layer: there is no standard way to prove that a real human composed and sent this specific communication, to you, right now.
Human Sender builds that layer. Every message or call can carry a one-time proof-of-effort token tied to the message content, the sender's verified identity, and the timestamp. It cannot be generated without a biometric confirmation on a registered device.
Channel-agnostic
Works across email, SMS, phone, LinkedIn, WhatsApp — any channel where you can include a short URL or a code.
No app needed to verify
Recipients verify in one click. No account required. Works in any browser on any device.
Content-bound
The code is tied to the exact message body via a SHA-256 hash. Alter the message and the verification fails.
Biometric-gated
Minting a code requires Face ID or fingerprint. No bot or script can generate codes in bulk.
The company
Based in Barcelona. Built for Europe.
Human Sender is operated by Blustrix OÜ, a private limited company registered in Estonia (registry code 16864889). We are building for the European market first — where regulatory tailwinds, GDPR, and eIDAS 2.0 make verified identity both a legal priority and a competitive edge.
All data is stored and processed in the EU. No exceptions.
The long-term vision
We want Human Sender to become the trust layer for human-to-human digital communication — the way HTTPS became the trust layer for web traffic.
A world where every cold email shows a verified-human badge, every outbound call shows agent identity, and every video call shows a live biometric confirmation that the person is real.
Starting with sales reps. Building toward the infrastructure layer that protects everyone.
Want to talk?
Partnership enquiries, press, or just curious — we respond within one business day.