Seamoon is an effects pedal brand whose lineage traces back to a small Berkeley, California company founded in 1973. The original Seamoon Inc. was associated with electronics author Craig Anderton and is best remembered for the Funk Machine envelope filter, an early auto-wah design that became a cult favorite among funk and studio players. Other period pedals included the Studio Phase phaser, the Fresh Fuzz (notable for using an op-amp rather than the era's more common transistor-based fuzz circuits), and the Controlled Tone Preamp.

The Seamoon name was revived under Seamoon FX, a modern iteration co-owned by session bassist and producer Neil Jason, whose stated aim was to recreate the sound of the original Funk Machine after being dissatisfied with other clones. The relaunched line focuses on compact, pedalboard-friendly builds of vintage-inspired circuits. Its catalog includes the Funk Machine envelope filter, the Grind Machine overdrive, the Octatron octave pedal, and the Skye Machine.

The brand markets itself around the tagline "Keeping the Funk Alive" and sits in a niche of boutique effects makers reviving classic 1970s designs for modern players. Original Seamoon units from the 1970s remain collectible on the vintage market.

Seamoon has 4 products cataloged on Equipboard, including Filter Effects Pedals, Fuzz Effects Pedals, and Overdrive Effects Pedals. Their gear is featured by 6 artists, with the strongest followings in Rock, Jazz, and Pop. Notable users include Eric Johnson, Michael Brecker, and Neil Jason.