Third-Party Control Systems

Q-SYS

Visionary developed a comprehensive set of plugins for the Q-SYS platform. You can find them here: Alliances & Partnerships

Crestron

While not on Crestron marketplace, you can find an example module here: Visionary VOIP Crestron Driver v1.1.zip

All others

Visionary publishes an API for their 4 & 5 series products, so they can be controlled by virtually any third party system. You can find it here: 4 Series API Document - Dropbox. Note that the API for 4 & 5 series is identical.