AlphaTheta Corporation, formerly known as Pioneer DJ Corporation, is a Japanese company that designs, develops, and sells DJ equipment, software, and professional audio equipment. While the company changed its name to AlphaTheta in January 2020, its primary brand for DJ products remains Pioneer DJ. In early 2024, AlphaTheta announced that new products would be released under the AlphaTheta brand name, alongside the existing Pioneer DJ products. This change reflects the company's broader vision to expand beyond the DJ market and explore new avenues in music and audio technology, while still maintaining its strong presence in the DJ industry with the Pioneer DJ brand.