vMix is live production and streaming software for Windows PCs and laptops. It lets users mix, switch and record video sources and stream to platforms such as Facebook, YouTube and Twitch. The software is installed on the user's own computer and runs there. It is developed by StudioCoast Pty Ltd, which describes itself on its website as an Australian software development company.
StudioCoast Pty Ltd is an Australian proprietary company; its website does not state a registered address. Australia is outside the EU and the EEA. Because vMix runs on local hardware, the sovereignty question centres on the external services it connects to, such as streaming platforms and video conferencing inputs, rather than on a vendor cloud. The vendor's website does not describe vMix hosting customer data, and the open-source status is not stated.