Frigate is the open-source, Docker-based NVR project. Fregata is a commercial native macOS port of Frigate, repackaged as a signed, notarized .app that runs natively on Apple Silicon with extreme performance - no Docker, no VMs, no terminal setup.
Fregata adds Apple Neural Engine detection, VideoToolbox hardware accelerated video decode/encode, and hundreds of other performance optimizations for Apple Silicon (see docs.fregata.app for more). The Frigate Python core is open source; the macOS runtime port, Apple Silicon optimizations, and the Fregata brand are proprietary.