Sygaldry

Sygaldry is a photonic quantum computing startup that was accepted into Y Combinator's Winter 2025 batch (YC W25). The company is developing photonic quantum computers that use light-based qubits, leveraging the inherent advantages of photonics including room-temperature operation and natural resistance to decoherence.

As part of the YC W25 cohort, Sygaldry represents one of the newest entrants to the quantum computing hardware space, joining the growing wave of photonic quantum computing companies including PsiQuantum, Xanadu, and QuiX Quantum. The company's approach to photonic quantum computing aims to address key scalability challenges in quantum hardware development.

Sygaldry is positioned at the intersection of photonics and quantum computing, developing integrated photonic chips for quantum information processing. The Y Combinator backing provides the company with early-stage funding and access to the accelerator's extensive network of technology investors and mentors.