Quantum Resilience
Post-quantum cryptography, quantum key distribution, quantum-safe networking and cryptographic inventory - preparing for the quantum threat to today's encryption.
SandboxAQ
Alphabet spinout building AQtive Guard, a cryptographic management platform helping enterprises inventory, assess and migrate to quantum-safe encryption.
QuintessenceLabs
A Canberra, Australia-based quantum cybersecurity company providing hardware QRNG, quantum key distribution and post-quantum-readiness tools, backed by a…
American Binary
Deep-tech cybersecurity company building the first enterprise VPN fully compliant with the NSA's CNSA 2.0 post-quantum cryptography standard.
ID Quantique
Geneva-founded Quantum Key Distribution and quantum-safe cryptography pioneer, acquired by Nasdaq-listed IonQ in 2025 to anchor its quantum…
enQase
U.S. quantum-safe security platform unifying post-quantum cryptography, key governance and hardware-rooted entropy.
TYCHON
Fairfax cybersecurity software company focused on cryptographic discovery, inventory and post-quantum readiness for enterprises and agencies.
ISARA Corporation
Canadian cryptographic-discovery and post-quantum migration vendor, an early NIST PQC standards contributor now selling into US federal and…
QNu Labs
QNu Labs builds quantum-safe cybersecurity infrastructure — quantum key distribution, quantum random number generation, and post-quantum key management…
Post-Quantum
UK cryptography vendor building quantum-safe encryption, VPN, and identity products, with an IETF-standardized post-quantum VPN protocol trialed by…
PQShield
PQShield builds post-quantum cryptography libraries and hardware accelerators, including quantum-resistant TLS/network encryption implementations, to help organizations transition network…
Enquantum
Enquantum is a quantum-security company based in Holon, Israel, founded in 2020 and backed in part by the…
Quantum Bridge Technologies
Quantum Bridge Technologies builds quantum-safe key distribution infrastructure that protects data now against future 'harvest now, decrypt later'…
Crypta Labs
A London-based hardware company building Quantum Random Number Generators that extract true entropy from quantum photonics, with an…
Project Eleven
A 2024-founded New York post-quantum migration specialist for crypto networks that raised a $20M Series A at a…
HEQA Security
Israeli maker of quantum-safe appliances combining quantum key distribution with post-quantum cryptography overlays; formerly QuantLR.
QTI (Quantum Telecommunications Italy)
Florence quantum key distribution (QKD) company, a spin-off of the Italian CNR optics institute and a subsidiary of…
QuSecure
QuSecure builds a software-only platform, QuProtect, that discovers where classical cryptography is used on an organization's network and…
pQCee
pQCee is a Singapore-based post-quantum cryptography company building tools to help organizations prepare for the eventual arrival of…
KETS Quantum Security
Bristol-based developer of chip-scale quantum key distribution and quantum random number generation for satellite, naval, and telecom networks.
Q*Bird
Dutch deep-tech startup spun out of QuTech/TU Delft building measurement-device-independent quantum key distribution hardware for quantum-safe network communications.
Quantropi
Ottawa-based post-quantum cryptography company selling quantum-secure encryption for data in transit and at rest, currently completing a reverse…
LQUOM
Yokohama quantum-communication startup developing quantum repeaters for long-distance quantum networks and a quantum internet.
AllSecureX
AllSecureX is an Indian startup building a software-defined platform to discover cryptographic assets and manage the transition to…
Sparkle
International carrier (Telecom Italia Sparkle) that has launched quantum-safe network services; tracked here for those services only.
Anametric
Austin startup developing chip-scale quantum photonic integrated circuits for post-quantum and quantum-based cybersecurity.
CyberHive
CyberHive builds zero-trust, quantum-safe network connectivity software for defence, aerospace, maritime, and other bandwidth-constrained, high-risk environments.
Arqit
London-based public company (Nasdaq: ARQQ) building quantum-safe encryption key distribution and, more recently, cryptographic discovery tools for post-quantum…
QIZ Security
A seed-stage New York cryptographic-asset inventory startup for post-quantum migration.
Light Rider
Maryland quantum-integration company building quantum-entropy and quantum-LiFi security products, founded by a former U.S. Army cyber officer.
QTrino Labs
An IIT-incubated Indian post-quantum startup with a source-code CBOM tool, majority-acquired by Satin Technologies in 2026.
InfiniQuant
Erlangen-based quantum cryptography developer building metropolitan and satellite quantum key distribution and quantum random number generation.
Cavero Quantum
A Leeds, UK university spin-out building lightweight, quantum-safe encryption and authentication software for SIM cards and constrained IoT…
Lokdon
Columbia, SC-based vendor offering keyless, post-quantum encryption (ECSMID, DataShieldAI) as a developer SDK; thin independent evidence of scale…
QuantumIQ
A Vancouver post-quantum readiness vendor absorbed into Redwood AI via an all-share deal with milestone escrow.
SLEEX
A South Korean seed-stage startup fusing lightweight quantum key distribution with AI-driven sensing for underwater and IoT security.