Fastest-growing Quantum Security companies, Q3 2026

QNu Labs is a quantum cryptography company that develops quantum-safe security solutions for data protection. The company manufactures two primary products: Armos, a Quantum Key Distribution (QKD) system, and Tropos, a Quantum Random Number Generator (QRNG). Both products are available on India's Government e-Marketplace (GeM) portal and are used by organizations including the Indian Navy and government agencies.

QIZ develops a Crypto Agility platform designed to help organizations manage cryptographic assets and prepare for the transition to Post-Quantum Cryptography (PQC). The company focuses on assisting security leaders in understanding their existing cryptographic posture, identifying vulnerabilities related to emerging quantum computing threats, and prioritizing remediation actions in line with compliance requirements.

Quantum Bridge Technologies develops quantum-safe cybersecurity solutions designed to protect data and network communications against both classical and quantum computing threats. Founded in 2019 as a spin-out from the University of Toronto, the company builds on research in quantum and classical information theory, cryptography, and communications.

QuSecure is a cybersecurity company focused on post-quantum cryptography (PQC) and crypto-agility. The company develops and markets the QuProtect R3 platform, a software solution designed to help organizations discover, remediate, and report on cryptographic vulnerabilities across their IT and OT infrastructure.

• Recon (Reconnaissance): Provides automated, continuous discovery and inventory of cryptographic assets across cloud, on-premises, air-gapped, and…
• Resilience (Remediation): Enables organizations to update and migrate cryptographic protocols across their networks without code changes, system…
• Reporting (Compliance): Generates compliance reports aligned with standards such as NIST, FIPS, CNSA 2.0, CNSSP 15, and GDPR, offering on-demand…

Entrokey Labs develops cryptographic entropy and key generation technology intended to address vulnerabilities exposed by advances in AI and quantum computing. The company's approach centers on the concept of measuring and generating high-quality entropy, the randomness that underlies cryptographic keys, since weaknesses in entropy can undermine encryption even when standard statistical tests pass.

Aliro Quantum develops quantum networking technology for entanglement-based quantum networks. The company's flagship product, AliroNet, enables organizations to run quantum networks for applications including Quantum Secure Communications (QSC), secure access to clouds and data centers, networking of quantum computers, and networking of distributed quantum sensors.

LuxQuanta is a Barcelona-based spin-off from ICFO (Institute of Photonic Sciences) founded in May 2021. The company develops and delivers Quantum Key Distribution (QKD) systems designed to integrate into existing network infrastructures and provide quantum-safe security layers on top of mathematical cryptographic techniques.

The company's core technology focuses on Continuous Variable Quantum Key Distribution (CV-QKD), which addresses the security challenges posed by quantum computing to traditional encryption methods.

Arqit is a cybersecurity company that develops and delivers quantum-resistant encryption software through its SKA-Platform (Symmetric Key Agreement Platform). The company focuses on protecting organizations against both current cryptographic vulnerabilities and future quantum computing threats by eliminating reliance on traditional Public Key Infrastructure (PKI).

PQShield is a cryptography company specializing in post-quantum cryptography (PQC) — the development of cryptographic algorithms and solutions designed to be secure against attacks from quantum computers.

• Hardware-level cryptographic IP for semiconductor and chip manufacturers
• Software cryptographic libraries for embedded systems, firmware, and applications
• Consulting and advisory services to help enterprises and governments assess and plan their migration to post-quantum standards