Short answer: nearly all of them.
Long answer: most cameras and NVRs provide access to their H.264 video streams, so they'll work with Camio Box. But we've also recommended camera packages and linked to Amazon shopping lists at:
If you're uncertain whether a particular camera or NVR model supports RTSP access to its video streams, please don't hesitate to ask us at firstname.lastname@example.org.
Camio Box automatically discovers the models that it already knows about. But adding support for a new model takes less than a day. In fact, if you're a technical person, you can even add to the list of automatically configured models yourself by submitting a Pull Request for this repo.