S-Fifteen Instruments

S-Fifteen Instruments Pte. Ltd. is a Singapore-based quantum-technology company that designs and manufactures quantum cryptography and photonics hardware. Its product range includes quantum key distribution (QKD) systems, quantum random number generators, entangled photon-pair sources and single-photon detectors, alongside control and measurement instrumentation such as timetaggers, digital I/O and RF devices, and optical power meters. The company supplies research laboratories and enterprises building quantum-secure communications and photonic experiments from its base at Ayer Rajah Crescent.

Headquarters: Singapore 139967