Agile is a house brand of Rondo Music, a family-run American retailer established in 1959 and based in New Jersey. Since 1999, Rondo has imported Agile-branded electric guitars and basses built to their specifications in South Korea, with the line focused on designs that larger manufacturers underserve — extended-range 7-, 8-, 9- and 10-string models, left-handed configurations, fretless and headless builds, and set-neck or neck-through solidbodies at price points well below boutique equivalents.

The catalog includes long-running series such as the AL (a Les Paul-style single-cutaway with models like the AL-2000, AL-3000 and AL-3100), the Interceptor Pro extended-range shred guitars (frequently loaded with EMG 707/808 pickups), the Harm doublecut, the Septor and Intrepid multi-scale 7- and 8-strings, and the Herald hollowbody, along with a range of four- through six-string basses. Agile's guitars are sold exclusively through Rondo Music's own website and its storefronts on Reverb, eBay and Amazon rather than through traditional music-store distribution.

The brand has a dedicated following among bedroom players, metal guitarists and multi-scale enthusiasts who value the unusual specifications and upgraded features — coil-splitting, compound-radius fretboards, abalone binding — offered at budget and mid-tier prices. Agile is rarely endorsed by major touring artists but is widely discussed on forums such as SevenString.org and The Gear Page, where it is often recommended as an affordable entry point into extended-range playing.

Agile has 46 products cataloged on Equipboard, including Solid Body Electric Guitars, Extended Range Guitars, and Semi-Hollowbody Electric Guitars. Their gear is featured by 9 artists, with the strongest followings in Rock, Metal, and Pop. Notable users include Chris Poland, Eddie Pickard, and Miles Dimitri Baker. Agile's catalog spans the full price spectrum — from entry-level options to high-end flagships.