Hazelrigg Industries is a boutique manufacturer of all-tube recording equipment based in Bucks County, Pennsylvania. The company was established in 2017 by brothers Geoff and George Hazelrigg through an exclusive licensing agreement to produce gear originally designed by Doug Fearn, who continues to serve as principal product designer and consultant. All Hazelrigg and D.W. Fearn equipment is hand-assembled in their Pennsylvania facility.

The brand is known for its vacuum tube signal processing gear aimed at professional tracking, mixing, and mastering applications. Notable products include the VLC all-tube preamp, EQ, and DI, the VNE tube compressor, the VEC "Everything Chain" bundle, the 4DI four-channel tube direct box, and a 500-series lineup comprising the DVA preamp, DLC EQ, and DNE PWM compressor. A software version of the VLC is also available as a plugin through MixWave.

The Hazelrigg brothers come from backgrounds in live performance and production, and their design approach emphasizes musical workflow and tonal character drawn from classic tube circuitry. The gear is distributed through pro audio retailers such as Sweetwater and KMR Audio and is frequently discussed on engineering-focused community sites like Gearspace.

Hazelrigg Industries has 7 products cataloged on Equipboard, including Preamps and Effects Processors. Their gear is featured by 1 artist, with the strongest followings in Pop. Notable users include Chris Cron.