About
Built for the people who actually hold their own keys.
Xellox makes the physical layer of Bitcoin self-custody: the steel your seed phrase survives on after the paper burns and the drive dies.
Mission
Steel-grade backup, nothing more.
Hardware wallets handle signing. Xellox handles the last mile — the recovery phrase — so your coins outlive the device that generated them. One product line. One problem. Made well.
Founder
Samuel Harjunpää.
Xellox is run by Samuel Harjunpää, a Bitcoin-native engineer based in Finland. You can find him on stage, on podcasts, and occasionally getting reposted by Michael Saylor — see the Signal page.
Company
Xellox Oy.
Registered in Finland. Every Yokis kit is manufactured, anodized, and shipped from the EU. Reach us at contact@xellox.io.