TouellSkouarn is a French effects and synthesizer module maker founded in 2010 by Gaël Loison, based in Plougastel-Daoulas in Brittany. The name is a Breton-language neologism roughly meaning "ear candy," and most of the brand's products are likewise named in Breton. Each unit is hand-wired with discrete components, frequently using germanium transistors, and the company also offers custom builds and vintage equipment repair.

The lineup spans guitar stompboxes, Eurorack modules, and desktop units, with a recurring focus on saturated, character-rich circuits. Notable products include the Strakal Brulu germanium fuzz, the Ar Merc'het Brao dual filter and overdrive, the Koantenn overdrive with resonant low-pass/high-pass filter and CV input, the Sonveskañ three-channel mixer with voltage-controlled feedback, the Kemmeskañ germanium stereo mixer, the Kruel colored fuzz, and the Mar Karit tube preamp. Accessory products such as the Hirlostek and Triglostek noise generators and converters round out the catalog.

The pedals and modules have a distinctive visual aesthetic to match their sound and are distributed through boutique retailers across Europe and North America. Members of acts including Stereolab and Sunn O))) have been associated with the brand.

TouellSkouarn has 1 product cataloged on Equipboard, including Fuzz Effects Pedals. Their gear is featured by 1 artist, with the strongest followings in Rock and Jazz. Notable users include Julien Desprez.