Quantum cybersecurity company LuxQuanta, Spain, has closed an €8 million series A funding round. According to the firm, the investment will support LuxQuanta’s efforts to scale production; advance R&D in quantum technologies and integrated photonics; grow its expand its commercial, technical, and operational teams; and accelerate global expansion.

The company says that it is “poised to democratize quantum-safe communications, delivering robust, scalable, and accessible solutions for telecommunications, governments, data centers, financial institutions, critical infrastructures and industrial and energy sectors.”

Protecting against quantum threats

Founded in 2021 as a spinoff from photonic R&D center ICFO, Spain, LuxQuanta develops continuous-variable quantum key distribution (CV-QKD) systems aimed at protecting digital communications against quantum threats. The company says it has already achieved multi-million-euro sales across dozens of European countries and has installations in Asia Pacific, Latin America, and the United States.

The firm’s NOVA LQ platform—which launched its second generation in March 2025—is designed to be integrated into existing optical networks; the quantum signal transmits alongside standard DWDM data channels, thus removing the need for dedicated fiber. NOVA LQ implements the Gaussian-modulated coherent-state CV-QKD protocol to provide security against attacks under finite-size conditions. It supports ETSI QKD standards, offers key rates over 100 kbps at 4 dB loss and operates up to 20 dB channel loss. The system also provides both point-to-point and multipoint configurations, which the company says halves costs for network expansion.

Optimistic investors

The series A round was led by Spanish venture capital firm Big Sur Ventures, with A&G as the main investor. “LuxQuanta’s proven CV-QKD technology and successful deployments position it as a leader in quantum cybersecurity,” said Ismael Almazán, Partner at Big Sur Ventures. “Their focus on integrated photonics is a game-changer, and we’re thrilled to support their mission to set a global standard for quantum-safe infrastructure.”

Other participants include GMV, Wayra and the European Investment Committee (EIC) Fund, alongside existing backers Corning, Inc. and GTD. The round is further complemented by the soft financing from the EIC through the EIC Accelerator program, following the €2.5 million grant awarded to LuxQuanta in March 2024.

“This series A funding is a powerful validation of our vision to safeguard global communications in the quantum era,” commented Vanesa Díaz, CEO of LuxQuanta. “With this investment, we will scale our operations, enhance our technology, and expand our global footprint. The journey to quantum-safe networks is critical, and it starts now. We’re committed to making quantum security accessible and reliable for organizations worldwide.”