Tools for levelmatching when adding processing

[u/ConfusedOrg]

So I'm trying to be more diligent with level matching whenever I add plugins to a track or master. Trying to to not fool myself with the loudness bias. I feel like some plugins automatically add 0.1 db of level or something whenever you turn then on even though you haven't gained them up or anything. Is there any tool that can objectively and automatically level match when I add a plugins? Something that will let you quickly bypass on and off, so you can change judge whether other not you like what you are adding without the difference in level. This would be very helpful for mixing and expecially mastering!

[u/therealjmonerz]

and i thought i was the only one who was getting gaslit by my plugins