Founded in the mid-1990s as Wave Mechanics by Ken Bogdanowicz and Bob Belcher — both former Eventide engineers who helped design the legendary H3000 Ultra-Harmonizer — the company rebranded as Soundtoys in 2003 to avoid confusion with the Waves plugin company. Based in Burlington, Vermont, Soundtoys develops audio effect plugins that blend the character of classic analog hardware with modern flexibility, earning a reputation as one of the most respected names in professional music production software.

The Soundtoys catalog spans a wide range of effects, each known for its rich, musical sound. EchoBoy is a flagship delay plugin offering dozens of echo styles inspired by vintage tape and analog units. Decapitator delivers analog saturation modeled after classic studio hardware. Other standouts include Little AlterBoy for vocal pitch and formant manipulation, Crystallizer for granular reverse-echo effects rooted in the Eventide H3000, PrimalTap for unpredictable rhythmic delay, FilterFreak and PhaseMistress for analog-style filtering and phasing, and the SuperPlate and Little Plate reverbs. The Effect Rack provides a modular environment for chaining and combining Soundtoys effects. The complete collection is available as the Soundtoys 5 bundle.

Soundtoys plugins are widely used across genres by producers and mix engineers working with artists such as Beyoncé, Adele, Katy Perry, and Kendrick Lamar. Producer Greg Wells, known for his work with Ariana Grande and Dua Lipa, has cited Decapitator and EchoBoy as essential tools in his mixing workflow.

Soundtoys has 29 products cataloged on Equipboard, including Delay Plugins, Reverb Plugins, and Stereo Width Plugins. Their gear is featured by 249 artists, with the strongest followings in Electronic, Pop, and Rock. Notable users include Fox Stevenson, Stonebank, and Mike Shinoda. Most Soundtoys products fall in the mid-tier range — professional-grade without flagship pricing.