The Addigy Agent is a macOS-only agent that allows for the full features of Addigy, including deployment of Catalog items, information that is displayed in GoLive/the Devices page, and the installation of remoting tools such as LiveTerminal/LiveDesktop.
Addigy Agent documentation
MDM functionality is built into Apple devices and allows them to be configured using MDM configurations, which enforce device settings (such as FileVault) and commands (such as remote wipe/lock).