Xynth Audio is a music software company that develops audio plugins for producers, positioning itself with the tagline "for producers, by producers." Its products are distributed in VST3 and Audio Unit formats for macOS and Windows, targeting electronic music producers, mixing engineers, and sound designers looking for creative harmonic and tonal tools.

The company's flagship plugin is Chroma, a spectral processor that analyzes incoming audio and shifts out-of-key frequencies to the nearest note in a user-selected scale, effectively tuning the harmonic content of a sound to fit the key of a track. Its other main release, Rezonator, is a harmonic resonator effect featuring six tunable resonators with built-in effects and a streamlined control layout, used to add pitched resonance and harmonic color to any source material.

Xynth Audio distributes directly through its own site and through storefronts such as Gumroad, and maintains an active presence on plugin-news outlets like KVR Audio and Synth Anatomy, where releases such as Rezonator have been covered. The company also runs a Discord community alongside its social channels.

Xynth Audio has 1 product cataloged on Equipboard, including Pitch Shifter Plugins. Their gear is featured by 1 artist, with the strongest followings in Electronic. Notable users include Nasko.