Cat that kicks an exclamation mark.
Hardware of a Free Design
Transparent. No Tricks. No Compromises.


Zerocat is run by Kai Mertens, who seeks for help, support, pioneer customers, and friends without smartphones. If you need to see a tool come true, which does not yet exist as free-design hardware, please get in touch.

Software that we use for Communication

We are using Tox with uTox and qTox.
Our Tox IDs are provided on this page.

[...] Tox is a distributed and secure instant messenger with audio and video chat capabilities. — GNU Guix Package Description for uTox

In addition, let’s try communication via Jami Communication Software.
Jami IDs are provided on this page.

Jami is a secure and distributed voice, video and chat communication platform that requires no centralized server and leaves the power of privacy in the hands of the user. It supports the SIP and IAX protocols, as well as decentralized calling using P2P-DHT. — GNU Guix Package Description for Jami

As a third option, let’s use the GNU Privacy Guard in conjunction with email.
Public OpenPGP keys are available for download from this page. See OpenPGP for more details.

The GNU Privacy Guard is a complete implementation of the OpenPGP standard. It is used to encrypt and sign data and communication. [...] — GNU Guix Package Description for GnuPG