Two programs, one developer, one attitude.

VisualDev is not a company but the place where Simon Murk publishes his software: Hiatus Remote for remote support where the relay sees nothing, and Tenjin, a self-hosted media server with native clients.

Why build it yourself

Both projects grew out of the same unease: tools that route screens or media libraries through someone else's servers demand trust that cannot be verified. Hiatus and Tenjin are designed so that the relay only forwards encrypted packets. Passwords never leave the devices, keys are created on both ends, and anyone who does not trust the operator runs the relay themselves.

How the work is done

Logic and user interface are strictly separated: the logic lives in libraries without any dependency on the UI and is covered by unit, integration and fuzzing tests. Architecture, protocols and threat models are described on this website even though the source code stays closed. The manuals are written in German first and updated with every change to the user interface.

Contact

Questions, bug reports and feedback on the manuals go to the address given in the imprint. Please send security-related reports to the same contact; if a security.txt is set up, you will find it at /.well-known/security.txt.

Licences of the programs

Hiatus Remote and Tenjin are closed source and use components under the following licences. The full licence texts ship with every download.

Component	Licence	Used in
Qt 6	LGPLv3 (dynamically linked)	Hiatus, Tenjin clients
ngtcp2 · nghttp3	MIT	Hiatus, Tenjin
OpenSSL 3	Apache 2.0	Hiatus, Tenjin
libmpv	LGPLv2.1+	Tenjin desktop client
AndroidX Media3	Apache 2.0	Tenjin Android clients
SQLite	Public domain	Tenjin server, website
Inter · JetBrains Mono	SIL OFL 1.1	Website

The licences of the website itself are listed under Licences.