GrassRoots is an entry-level guitar and bass brand operated by ESP Company of Japan, positioned below ESP's Edwards and Navigator lines as the value-oriented tier of the ESP family. The brand launched in the early 1990s with production based in Japan and later shifted manufacturing to Korea, with some models also produced in ESP's China facility under Japan-based quality control. GrassRoots instruments are designed to echo the body styles found across the broader ESP catalog, giving players access to the company's shape language at a lower price point.

The lineup is organized by body-style codes rather than single flagship models, including G-LP Les Paul–style singlecuts, G-SE Stratocaster-style doublecuts, G-TE Telecaster-style guitars, G-FR offset/Flying V-style shapes, and G-HR Horizon-style superstrats that mirror ESP's signature metal-oriented designs. The catalog also covers 4-, 5-, and 6-string basses, acoustic guitars, left-handed variants, and short-scale mini guitars aimed at beginners and travel use.

GrassRoots is distributed primarily in Japan and across Asian markets and is not part of ESP's main international LTD distribution, which has made the brand something of a domestic-market and import-only curiosity for players outside the region. It is generally compared to ESP's LTD 400-series and below, and is discussed in enthusiast communities as a gateway into ESP-style builds for players on a budget.

ESP GrassRoots has 22 products cataloged on Equipboard, including Solid Body Electric Guitars and Electric Basses. Their gear is featured by 6 artists, with the strongest followings in Rock, Metal, and Blues. Notable users include Takayoshi Ohmura, Enrico Laoagan, and Ichika.