QumulusAI, Inc. operates as a cloud infrastructure company. It operates through two segments, Bitcoin and High-Performance Computing. The company engages in the deployment of graphics processing unit-powered solutions for artificial intelligence applications. It is also involved in bitcoin mining and hosting, as well as compute power. The company serves underserved small and mid-market customers, including machine learning teams, AI infrastructure startups, and research institutions. The company was formerly known as Global Digital Holdings Inc. and changed its name to QumulusAI, Inc. in August 2025. The company was founded in 2019 and is based in Atlanta, Georgia.