STEIM (Studio for Electro-Instrumental Music) was an Amsterdam-based research center for electronic musical instruments and live performance technology, founded in 1969 by a group of Dutch composers including Misha Mengelberg, Louis Andriessen, Peter Schat, Dick Raaymakers, Jan van Vlijmen, Reinbert de Leeuw, and Konrad Boehmer. The studio's guiding philosophy held that physical touch and direct gesture were essential to electronic music performance, and its work explored the intersection of the performing body and electronic sound.

STEIM is best known for the Cracklebox (Kraakdoos), a small battery-powered touch-sensitive noise instrument originally developed by Michel Waisvisz with Geert Hamelberg in the late 1960s; roughly 4,000 units were produced and sold from Amsterdam. Under Waisvisz's long tenure as artistic director, the studio also developed The Hands, a pioneering pair of MIDI gesture controllers worn on the hands, along with software instruments such as LiSa, a real-time live-sampling environment, and junXion, a tool for mapping game controllers, sensors, and other input data to MIDI and OSC. These tools, built largely with collaborator Frank Baldé, were widely adopted by experimental electronic performers and improvisers.

Beyond instrument building, STEIM operated as an artist-in-residence program and workshop, hosting composers and performers working at the edges of electronic music, sound art, and improvised music. The organization wound down its activities in 2020 following changes in Dutch cultural funding, leaving behind an influential body of hardware, software, and documentation that shaped the field of gestural and live electronic instrument design.

STEIM has 2 products cataloged on Equipboard, including MIDI Interfaces and MIDI Keyboard Controllers. Their gear is featured by 2 artists, with the strongest followings in Electronic, Rock, and Jazz. Notable users include Michel Waisvisz and Nicolas Collins.