Oneder Effects is a Michigan-based guitar pedal company founded by Nick Diener, formerly the vocalist and guitarist of the punk/emo band The Swellers. Diener originally launched Oneder Studios as a recording facility producing emo and punk acts, then pivoted into building effects pedals during the COVID-19 pandemic, drawing on years of experience chasing tone as a touring musician.

The lineup includes the Oneder Drive (the flagship overdrive), the Old Blue Overdrive, the Red Ryder Distortion (a take on the RAT circuit), the Oneder Fuzz, the Burn Pile Fuzz Driver, the My Boost Over You boost, and the Onederbolt Distortion. The Onederwall combines a Big Muff-style fuzz with the Onederbolt distortion in a single dual enclosure. Oneder has also produced signature collaborations with artists from Less Than Jake, New Found Glory, The Get Up Kids, and Anberlin.

The pedals are built in Michigan and sold through the brand's webstore as well as retailers including Reverb, Guitar Center, and Chicago Music Exchange. Diener has since extended the Oneder name into the Oneder Guitar Company, offering electric guitars alongside the effects line.

Oneder Effects has 13 products cataloged on Equipboard, including Distortion Effects Pedals, Fuzz Effects Pedals, and Overdrive Effects Pedals. Their gear is featured by 6 artists, with the strongest followings in Rock and Metal. Notable users include Ian Fowles, Taylor Young, and Bo Lueders.