Overload Guitars is an Italian luthier shop based in Rome, founded in 2012 by Matteo Dondi. Operating as a small two-person custom-build operation, the company produces electric guitars, basses, cabinets, and drums, with a workflow centered on a modular custom-shop process where customers specify model, woods, hardware, pickups, finish, binding, and inlay details.

The brand's flagship is the REA, an extended-range-friendly electric guitar offered in 6, 7, and 8-string configurations as well as multi-scale variants. Overload also builds the REA bass alongside other custom guitar bodies through its custom shop program. The company sells primarily direct-to-customer rather than through traditional retail, emphasizing one-on-one specification of each instrument.

Overload has carved out a niche in the modern progressive and metal community, particularly among extended-range players, and the REA in particular has drawn coverage in seven-string and eight-string player circles.

Overload Guitars has 4 products cataloged on Equipboard, including Solid Body Electric Guitars and Electric Basses. Their gear is featured by 3 artists, with the strongest followings in Rock and Metal. Notable users include Eugene Abdukhanov, Cristiano Trionfera, and Paolo Rossi.