Castedosa Guitars is a small-batch electric guitar maker founded in 2022 by Carlos Lopez, a former Master Builder at the Fender Custom Shop with roughly two decades of high-end guitar building experience. The instruments are built by hand in Riverside, California, as a family operation: the brand name combines letters from Carlos, his wife Stephanie, and their children Dorian and Savannah. Stephanie hand-winds the pickups under the in-house TS Castedosa name.

The lineup centers on bolt-neck electrics with a vintage-leaning aesthetic and modern playability. Models include the Conchers Standard 25.5" and Conchers Baritone, the Marianna in semi-hollow and carve-top variants, the offset-style 3511 Lobo, the ABI, and the Conchers Short Scale Bass. The Conchers line in particular is designed with lower tunings in mind, drawing inspiration from players like Ariel Posen and Madison Cunningham.

Castedosa instruments are sold through a curated dealer network including Chicago Music Exchange, Wildwood Guitars, High Voltage Guitars, and Andertons in the UK, and have built a reputation in boutique guitar circles for the level of fit, finish, and detail typically associated with Custom Shop work.

Castedosa Guitars has 7 products cataloged on Equipboard, including Solid Body Electric Guitars, Semi-Hollowbody Electric Guitars, and Electric Basses. Their gear is featured by 2 artists, with the strongest followings in Rock and Pop. Notable users include Frank Iero and Hiroto Wakai.