Founded by Olivier Armbruster in Lyon, France, Glou-Glou is a boutique effects pedal company specializing in all-analog designs that push players toward unconventional sonic territory. The brand's tagline — "underwater sounds" — hints at its experimental ethos. Every pedal is hand-assembled and wired in Lyon. Armbruster, a longtime musician who spent years collecting and repairing pedals before launching his own line, designs circuits that prioritize originality over recreating classic topologies.

Glou-Glou's catalog spans a wide range of analog effects and instruments. The Pralines pairs four parallelized resonant band-pass filters with a gated fuzz, covering everything from phaser and flanger textures to self-oscillation and bass-synth sounds. The Moutarde is a four-filter PLL harmonizer, while the Pilule is a phase-locked loop fuzz harmonizer. The Rendez-Vous combines a phaser with an SVF filter through flexible routing and mixing options. The Steak is a dual-voice analog distortion workstation with parallel signal paths for gain-stage stacking. On the more experimental end, the Flancher is a voltage-controlled analog BBD stereo delay and modulation unit offered in multiple variants, the Loupé is a creative looper, and the Bien Jolie! is a Benjolin-inspired semi-modular hybrid synth and effects pedal featuring analog VCOs, a Rungler shift register, and a resonant filter.

Glou-Glou has 10 products cataloged on Equipboard, including Multi Effects Pedals, Flanger Effects Pedals, and Looper Effects Pedals. Their gear is featured by 1 artist, with the strongest followings in Rock and Funk / Soul. Notable users include Bootsy Collins.