Greengate Productions was a British electronics company based in Hertfordshire, England, founded around 1982 following a meeting at a computer user group in Hemel Hempstead. The company developed music hardware and software for the Apple II platform during the early era of digital sampling.

Greengate is best known for the DS:3, an expansion card for the Apple II+ that turned the home computer into a four-voice, 8-bit digital sampler and sequencer. The DS:3 system paired the card with a 49-key controller keyboard and editing software, and later revisions added MIDI support, touch sensitivity, and amplitude control. A planned successor, the DS:4, was designed around eight-voice polyphony, 16-bit audio, and MIDI/SMPTE synchronization for video work.

Sold largely direct and through a small network of resellers, the DS:3 shipped several hundred units before production difficulties and limited distribution brought the company's run to an end. The DS:3 remains a notable artifact of 1980s computer-based sampling, referenced in retrocomputing communities and occasionally revisited through hardware clone projects.

Greengate has 1 product cataloged on Equipboard, including Portable & Arranger Keyboards. Their gear is featured by 1 artist, with the strongest followings in Rock. Notable users include Spike Edney.