ReaXComp

ReaXComp is a free multiband compressor developed by Cockos, the company behind the popular REAPER digital audio workstation. It’s part of the ReaPlugs VST FX Suite, a bundle of native REAPER effects that can be used as plugins in any DAW. If you’re looking for a highly configurable yet surgically precise multiband compressor, look no further than ReaXComp. The plugin offers unlimited bands, intuitive controls, accurate metering, and transparent filtering.

In addition, ReaXComp is extremely CPU-efficient and snappy. You can run multiple instances in your DAW without any performance issues. Some users might find the interface design too surgical or dull, but ReaXComp is a no-nonsense multiband compressor that lets you focus on mixing without admiring a flashy GUI.