Horizon Quantum Holdings Ltd.

Horizon Quantum Holdings Ltd. is a quantum software company focused on software infrastructure for quantum applications. Its website says the company builds development, deployment, and execution infrastructure intended to bridge current quantum hardware and future applications. The company’s main named product is Triple Alpha, an integrated development environment with proprietary languages and a compiler for creating portable quantum programs across different processors.

According to the company’s About page, Horizon Quantum was founded in 2018 by Dr. Joe Fitzsimons and began operations in Singapore in 2019. It later opened a Dublin office in 2023. The same page states that the company launched early access to Triple Alpha in 2023, added features including dynamic memory management, pulse control, and measurement-based quantum computation in 2024, and established a hardware testbed at its Singapore headquarters in 2025. Horizon Quantum presents itself primarily as a software infrastructure provider, while also noting tighter hardware-software integration through its own quantum computer.