Klanghelm is a one-person audio software company based in the Berlin area of Germany, run by developer Tony Frenzel. It specializes in emulations of vintage analog compressors, saturation circuits, and metering tools for digital audio workstations, releasing both commercial and freeware VST/AU/AAX plugins for Windows and macOS.

The company is best known for the MJUC variable-tube compressor, the DC8C advanced digital compressor, the SDRR saturation "chameleon," the VUMT and VUMT deluxe metering and channel tools, and the TENS studio spring reverb. Free versions — DC1A, IVGI, MJUC jr., and TENS jr. — have circulated widely in home studios and are frequently recommended on forums like KVR Audio and Gearspace as high-quality entry points to analog-style processing.

Within the plugin community, Klanghelm has built a reputation for dense, character-driven processors at modest price points, driven largely by word of mouth rather than heavy marketing. Frenzel handles DSP development, interface design, and support himself, and the small catalog reflects a focus on a handful of deeply iterated tools rather than a broad product line.

Klanghelm has 11 products cataloged on Equipboard, including Compressor Plugins, Saturation Plugins, and Spectral Analysis Plugins. Their gear is featured by 4 artists, with the strongest followings in Electronic, Rock, and Metal. Notable users include Noisia, Adam Nolly Getgood, and Caribou.