If the official version is outside your budget, there are several highly-rated free "glue" style compressors available:

: This is the official developer website where you can purchase the plugin or download a legitimate free trial to test its features. It is well-regarded for its analog-modeled compression based on classic 80s British console bus compressors. Legitimate Free Alternatives

: A high-quality wideband dynamics processor from Tokyo Dawn Labs, often used for bus compression.