Q*Bird

Q*Bird is a Delft, Netherlands-based deep-tech startup founded in January 2022 by researchers from QuTech/TU Delft, building quantum key distribution (QKD) hardware and software to protect network communications against both current and future quantum-computer-enabled attacks. The company’s Falqon product line implements measurement-device-independent QKD (MDI-QKD), an architecture that removes the detector hardware — historically the most exploitable component of QKD systems — from the trust boundary, so an attacker who compromises the measurement device still cannot recover the key.

Its newest product, the Falqon MQS4000 Quantum Switch, extends QKD from simple point-to-point links to scalable multipoint-to-multipoint networks, allowing many users to share quantum key exchange infrastructure without redesigning hardware for every new connection. The company has run field tests on SURF’s Dutch national research network and lists early engagements with the Port of Rotterdam, along with commercial and telecom relationships including Cisco, Juniper, KPN, Eurofiber, and ABN AMRO.

Q*Bird’s relevance is tied to the "harvest now, decrypt later" threat model: adversaries capturing encrypted traffic today in anticipation of future quantum-computer decryption capability. That threat is real but the truly exploitable timeline remains uncertain, and quantum-safe networking is still a niche, early-adopter market largely limited to critical infrastructure, government, and financial institutions with the highest sensitivity to long-horizon confidentiality risk. The company is small and early-stage, having raised roughly EUR2.5 million in 2024, and independent, named production deployments beyond pilot/field-test status are limited so far.