Grzenia Guitars is a Chicago-based electric guitar maker founded in 2018 by Alexander Grzenia, who started the company in a garage on the city's South Side. The brand designs and produces a small lineup of original-shape solid-body electrics, with named models including the Royale, Empress, Hussar, Jagerin, Baroness, Czar, and Ventress.

Production is organized around a few collections, including the Nero Standard Series — all-black instruments with open-pore finishes — and the Roots Series of in-stock builds. The company also takes custom orders direct through its website and has produced artist-collaboration variants such as the Fuzzed Drones F1 edition of the Jagerin.

Grzenia sells direct-to-consumer through its own site and is also stocked on Reverb and at Guitar Center, with the brand maintaining its presence largely through Instagram and Facebook rather than traditional dealer networks.

Grzenia has 4 products cataloged on Equipboard, including Solid Body Electric Guitars.