Many producers have created tools that mimic Soothe 2's functionality at a fraction of the cost. is one of the closest competitors, and it even offers features Soothe 2 lacks, such as different attenuation settings for multiple frequency ranges. KERN Audio SMOOTH is another option available for just $29. Curves Equator from Waves, RESO from Mastering the Mix, and Techivation M-Clarity all offer affordable dynamic resonance suppression.
Find to Soothe 2 (like resonance suppressors or dynamic EQs)