IBM

IBM Research Zurich researchers co-authored three of the four NIST PQC standards (ML-KEM/CRYSTALS-Kyber, ML-DSA/CRYSTALS-Dilithium, FN-DSA/Falcon), and IBM sells Quantum Safe migration tools and services.

Very high relevance · Software & platforms · United States, Armonk · founded 1911 · 270k staff

Alphabet (Google DeepMind)

Google co-designed SPHINCS+ (SLH-DSA), turned on hybrid ML-KEM key exchange by default in Chrome, and is rolling PQC out across Google Cloud KMS and its internal traffic.

Very high relevance · Software & platforms · United States, Mountain View · founded 1998 · 183k staff

Cloudflare

Cloudflare runs hybrid post-quantum key agreement by default across its global network and carries a large share of the world's PQ-protected TLS traffic.

Very high relevance · Operations & infrastructure · United States, San Francisco · founded 2009 · 4,263 staff

PQShield

Oxford spin-out whose researchers contributed to the NIST PQC standards (Falcon and others); it licenses PQC hardware IP and software libraries to chipmakers and OEMs.

High relevance · Design · United Kingdom, Oxford · founded 2018

Thales

Thales sells Luna HSMs with FIPS 140-3 validated PQC support, PQC-ready smart cards and 5G SIMs, and quantum-safe network encryptors for governments.

High relevance · Systems integration · France, Paris · founded 1893 · 83k staff

Infineon Technologies

Infineon is a top PQC patent applicant, made the first Common Criteria-certified security controller with ML-KEM, and ships PQC-protected TPM and secure-element firmware.

High relevance · Components & subsystems · Germany, Neubiberg · founded 1999 · 58k staff

NXP Semiconductors

NXP researchers co-authored CRYSTALS-Kyber and Dilithium, and NXP is adding PQC to its secure elements, microcontrollers and automotive processors.

High relevance · Components & subsystems · Netherlands, Eindhoven · founded 2006 · 33k staff

SandboxAQ

Alphabet spin-out whose AQtive Guard cryptographic inventory and PQC migration platform is used by US federal agencies (via DISA) and large banks.

High relevance · Software & platforms · United States, Palo Alto · founded 2022

Microsoft

Microsoft Research co-designed FrodoKEM and other PQC candidates, added ML-KEM and ML-DSA to SymCrypt and Windows, and runs a company-wide Quantum Safe Program.

High relevance · Software & platforms · United States, Redmond · founded 1975 · 228k staff

Amazon (AWS)

AWS ships ML-KEM hybrid TLS in its s2n-tls and AWS-LC libraries and KMS, ACM and Secrets Manager endpoints, and offers ML-DSA signing in AWS KMS.

High relevance · Operations & infrastructure · United States, Seattle, Washington · founded 1994 · 1.6m staff

Apple

Apple runs the PQ3 post-quantum protocol in iMessage for hundreds of millions of devices and adds ML-KEM hybrid TLS across its operating systems.

High relevance · Hardware & devices · United States, Cupertino · founded 1976 · 164k staff

Keyfactor

Keyfactor maintains the Bouncy Castle and EJBCA libraries, which are widely used early implementations of ML-KEM and ML-DSA, and sells PQC certificate lifecycle tools.

High relevance · Software & platforms · United States, Independence · founded 2001

Samsung Electronics

Samsung is the leading international PQC patent applicant, launched the S3SSE2A secure element with hardware PQC, and added PQC to Galaxy devices and Samsung SDS services.

Moderate relevance · Components & subsystems · South Korea, Suwon · founded 1969 · 268k staff

Huawei

Huawei does PQC research, has integrated post-quantum algorithms into its network and telecom equipment, and is China's largest PQC patent applicant in ICT.

Moderate relevance · Hardware & devices · China, Shenzhen · founded 1987 · 208k staff

Entrust

Entrust's nShield HSMs have NIST CAVP-validated ML-KEM, ML-DSA and SLH-DSA, and it sells PQC-ready PKI and certificate services.

Moderate relevance · Software & platforms · United States, Shakopee · founded 1969

DigiCert

DigiCert is a major certificate authority that offers ML-DSA PQC certificates and PKI, and runs PQC test tooling and an industry quantum-readiness programme.

Moderate relevance · Software & platforms · United States, Lehi · founded 2003

Utimaco

Utimaco's u.trust and CryptoServer HSMs support NIST PQC and stateful hash-based signatures (LMS/XMSS), and it supplies PQC HSMs to payments and PKI customers.

Moderate relevance · Hardware & devices · Germany, Aachen · founded 1983

CryptoNext Security

Spin-out of Sorbonne University and Inria that sells a PQC remediation software suite and has done quantum-safe migration pilots with French defence and banks.

Moderate relevance · Software & platforms · France, Paris · founded 2019

Synopsys

Synopsys licenses PQC-capable security IP (agile PQC public-key accelerators, hardware secure modules) that chip designers build into SoCs.

Moderate relevance · Design & engineering software · United States, Sunnyvale · founded 1986 · 20k staff

Rambus

Rambus sells Quantum Safe Engine IP cores and root-of-trust IP that implement ML-KEM and ML-DSA in hardware for data-centre and government chips.

Moderate relevance · Design · United States, San Jose · founded 1990

Intel

Intel is a top-10 international PQC patent applicant, does research on hardware acceleration of lattice and hash-based schemes, and is adding PQC to platform firmware security.

Moderate relevance · Components & subsystems · United States, Santa Clara · founded 1968 · 109k staff

STMicroelectronics

ST researchers co-authored SPHINCS+ and the Keccak/SHA-3 hash it relies on, and ST offers PQC libraries for its STM32 microcontrollers and secure elements.

Moderate relevance · Components & subsystems · Switzerland, Geneva · founded 1987 · 50k staff

Cisco Systems

Cisco is building PQC (ML-KEM hybrid IKEv2/TLS, quantum-safe secure boot) into its routers, firewalls and IOS XE/XR, and has published a quantum-safe roadmap.

Moderate relevance · Hardware & devices · United States, San Jose · founded 1984 · 86k staff

NTT

NTT's Social Informatics Laboratories do PQC research and standards work, and NTT is testing quantum-safe hybrid encryption on its networks and IOWN infrastructure.

Moderate relevance · Operations & infrastructure · Japan, Tokyo · founded 1952

NEC

NEC is a top-10 international PQC patent applicant that researches lattice cryptography and lightweight PQC and supplies quantum-safe communications to Japanese government users.

Moderate relevance · Professional & data services · Japan, Tokyo · founded 1899 · 105k staff

Lattice Semiconductor

Lattice's MachXO5-NX TDQ is a FPGA family with built-in CNSA 2.0-compliant PQC for secure boot and platform root of trust.

Moderate relevance · Design · United States, Hillsboro · founded 1983

CryptoLab

Seoul National University spin-out and the second-largest international applicant in this field's patent data; it works on lattice cryptography (HEaaN homomorphic encryption) and co-designed Korean PQC (KpqC) candidates.

Low relevance · Research & IP · South Korea, Seoul · founded 2017

Sansec Technology

Chinese HSM and cryptographic-module maker whose HSMs support ML-KEM, ML-DSA and SLH-DSA under FIPS 140-3, alongside China's national SM algorithms.

Low relevance · Hardware & devices · China, Beijing · founded 2008

China Telecom

Through its China Telecom Quantum Group it runs quantum-secure calling and has rolled out hybrid QKD-plus-PQC encrypted communications to government and enterprise users.

Low relevance · Operations & infrastructure · China, Beijing · founded 2002

Post-Quantum

UK firm (formerly PQ Solutions) that co-designed the NTS-KEM code-based scheme, which was merged into the Classic McEliece NIST submission, and sells quantum-safe VPN and identity products.

Low relevance · Software & platforms · United Kingdom, London · founded 2009

QuSecure

QuSecure's QuProtect software orchestrates PQC migration and holds US Air Force and Army SBIR contracts, including the first PQC-protected satellite link.

Low relevance · Software & platforms · United States, San Mateo · founded 2019

Crypto4A Technologies

Canadian maker of QxHSM quantum-safe hardware security modules, which have PQC and crypto-agile firmware and are certified for Canadian government use.

Low relevance · Hardware & devices · Canada, Ottawa · founded 2012

evolutionQ

Founded by University of Waterloo cryptographers Michele Mosca and Norbert Lütkenhaus, it sells the BasejumpQDM quantum-risk management and PQC migration platform.

Low relevance · Software & platforms · Canada, Kitchener · founded 2015

SK Telecom

SK Telecom made PQC SIM cards with Thales, applied PQC to its networks and subscriber authentication, and is a quantum-safe partner in the GSMA Post-Quantum Telco Network Taskforce.

Low relevance · Operations & infrastructure · South Korea, Seoul · founded 1984

Chunghwa Telecom

Taiwan's incumbent operator, whose Telecommunication Laboratories have demonstrated and deployed hybrid PQC and quantum-safe secure communications for Taiwanese government networks.

Low relevance · Operations & infrastructure · Taiwan, Taipei · founded 1996

SEALSQ

WISeKey's semiconductor arm develops the QS7001 post-quantum secure element and PQC root-of-trust chips, and is expanding PQC programmes in Saudi Arabia and elsewhere.

Low relevance · Components & subsystems · Switzerland, Geneva · founded 2022

Securosys

Swiss maker of Primus HSMs, which support all NIST-selected PQC algorithms; they are used by the Swiss interbank clearing system and by banks and custodians.

Low relevance · Hardware & devices · Switzerland, Zurich · founded 2014

Technology Innovation Institute

Its Cryptography Research Centre, under Abu Dhabi's ATRC, released the UAE's first PQC software library, which feeds the UAE Cyber Security Council's national post-quantum migration plan.

Low relevance · Research & IP · United Arab Emirates, Abu Dhabi · founded 2020

QuintessenceLabs

Australia's leading quantum-cybersecurity firm, which sells quantum random number generators, a key-management platform and PQC-ready encryption to Australian and US government customers.

Low relevance · Hardware & devices · Australia, Canberra · founded 2008

QNu Labs

India's leading quantum-safe security startup, backed by the National Quantum Mission, whose QShield platform combines NIST-compliant PQC with QKD and QRNG.

Low relevance · Hardware & devices · India, Bengaluru · founded 2016

Tata Consultancy Services

TCS runs quantum-safe cryptography advisory and migration services, including cryptographic discovery and PQC transition, for banks and enterprises worldwide.

Low relevance · Professional & data services · India, Mumbai · founded 1968 · 608k staff

Singtel

Singtel launched a nationwide quantum-safe network that combines PQC and QKD for enterprise and government customers, in line with Singapore CSA's quantum-safe guidance.

Low relevance · Operations & infrastructure · Singapore, Singapore · founded 1879

Senetas

Senetas makes CN-series high-assurance network encryptors with quantum-resistant, crypto-agile options; Thales distributes them globally for government and critical-infrastructure links.

Low relevance · Hardware & devices · Australia, Melbourne · founded 1999

Kryptus

Brazil's main HSM maker; its kNET HSM supports ML-KEM, ML-DSA and SLH-DSA with NIST CAVP validation and is used by ICP-Brasil certificate authorities such as V/Cert.

Very low relevance · Hardware & devices · Brazil, Campinas · founded 2003

Aselsan

Turkey's defence-electronics champion, majority owned by the Turkish Armed Forces Foundation, whose cryptography team designs high-assurance crypto systems and works on PQC for national secure communications.

Very low relevance · Systems integration · Türkiye, Ankara · founded 1975 · 11k staff

Cybernetica

Estonian research and development firm behind X-Road and e-government systems; it has studied and planned post-quantum migration of Estonia's digital identity and state infrastructure.

Very low relevance · Research & IP · Estonia, Tallinn · founded 1997

QuantumGate

ATRC/VentureOne venture that sells a TII-derived Crypto Discovery Tool and PQC migration services under the UAE's national post-quantum transition partnership.

Very low relevance · Software & platforms · United Arab Emirates, Abu Dhabi

QApp

Russian startup linked to the Russian Quantum Center that develops post-quantum signature and encryption products (including domestic lattice schemes) for Russian banks and government.

Very low relevance · Software & platforms · Russia, Moscow

Synergy Quantum

Indian quantum-cybersecurity startup that in 2025 opened a PQC-over-5G quantum cybersecurity sandbox at The Garage in Riyadh, backed by Saudi Arabia's Ministry of Communications and Information Technology.

Very low relevance · Software & platforms · India, New Delhi

pQCee

Seed-stage Singapore startup selling FIPS 203 ML-KEM-based post-quantum encryption for web applications.

Very low relevance · Software & platforms · Singapore, Singapore