While the MSRP of Waves plugins can look high, they are almost permanently on sale. The SSL G-Master Buss Compressor can frequently be purchased for as low as $29 to $35 during seasonal sales (Black Friday, Summer Sales, etc.).
Aim for only 1-3dB of gain reduction on the loudest parts of the song.
What (Logic, FL Studio, Ableton, etc.) are you currently using? What genre of music are you mixing?
Using pirated software violates copyright laws and deprives the developers who build these tools of their livelihood. Top 4 Free Alternatives to the SSL G-Buss Compressor
In the digital era, Waves Audio collaborated with SSL to create the plugin. It meticulously models the IC input and twin VCA gain-reduction design of the original hardware. Because of its legendary status, thousands of music producers, mixing engineers, and hobbyists search daily for terms like "ssl gmaster buss compressor free download verified."