Post Quantum Security

21 Companies 1 Categories

Companies helping organizations protect data, identities, and communications against future quantum-enabled attacks.

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Post-quantum security infrastructure

21 companies

Companies building the cryptography, key distribution, and randomness layers needed to make security systems resilient in a post-quantum world.

Q*Bird

q-bird.com

Q*Bird builds quantum-secure communication hardware and software for scalable quantum networks, focused on quantum key distribution (QKD) systems that generate and exchange keys securely.

11-50 employees Employees Unknown Stage 2022 Founded
Trajectory Signals Strength Moderate

Confidence: High

Project Eleven

projecteleven.com

Project Eleven is an applied lab building post-quantum security and migration tools for digital assets, including quantum-safe wallet infrastructure, audit/reference implementations, and readiness assessments for blockchains and institutions.

2-10 employees Employees Series A Stage 2024 Founded
Trajectory Signals Strength Strong

Confidence: Medium

CryptoNext Security

cryptonext-security.com

A Paris-based post-quantum cryptography software company that helps organizations discover, remediate, and manage cryptographic assets with crypto-agility and PQC solutions. ([cryptonext-security.com](https://www.cryptonext-security.com/en/?utm_source=openai))

11-50 employees Employees Unknown Stage 2019 Founded
Trajectory Signals Strength Slight

Confidence: Medium

KETS Quantum Security

kets-quantum.com

KETS Quantum Security builds chip-based quantum-safe security hardware and networking products, including Quantum Key Distribution (QKD) and Quantum Random Number Generators (QRNG), to protect communications and infrastructure.

11-50 employees Employees Unknown Stage 2016 Founded
Trajectory Signals Strength Slight

Confidence: Medium

evolutionQ

evolutionq.com

evolutionQ develops quantum-safe cybersecurity products and services, including post-quantum cryptography (PQC) software, quantum key distribution (QKD) tooling, and cryptographic risk-assessment services.

11-50 employees Employees Series A Stage 2015 Founded
Trajectory Signals Strength Slight

Confidence: Medium

VeriQloud

veriqloud.com

VeriQloud builds quantum cybersecurity infrastructure, including Qline for quantum key distribution and Qasmat for quantum-safe distributed cloud storage.

11-50 employees Employees Unknown Stage 2017 Founded
Trajectory Signals Strength Slight

Confidence: Medium

Quside

quside.com

Quside develops quantum-technology products, especially quantum random number generators and entropy/rand­omness infrastructure, to strengthen secure connectivity and high-performance computation. ([quside.com](https://quside.com/?utm_source=openai))

51-200 employees Employees Series A Stage 2017 Founded
Trajectory Signals Strength Slight

Confidence: Medium

Quantum Bridge Technologies Inc.

qubridge.io

Quantum Bridge builds quantum-safe cybersecurity infrastructure, including patented key-distribution and symmetric-key establishment technology, to help organizations protect communications and data against future quantum threats.

11-50 employees Employees Series A Stage 2019 Founded
Trajectory Signals Strength Moderate

Confidence: High

zerothird

zerothird.com

zerothird builds entanglement-based quantum key distribution (eQKD) systems that generate shared keys from distributed entangled photons for quantum-safe communication.

11–50 employees Employees Unknown Stage 2023 Founded
Trajectory Signals Strength Moderate

Confidence: High

PQShield

pqshield.com

PQShield develops post-quantum cryptography products and infrastructure across software, hardware, and cloud environments to protect data and communications against future quantum attacks.

51-200 employees Employees Series B Stage 2018 Founded
Trajectory Signals Strength Moderate

Confidence: Medium

QuSecure

qusecure.com

QuSecure is a post-quantum cybersecurity company that provides crypto-agility and quantum-safe encryption software to help organizations protect data and communications against future quantum threats.

Unknown Employees Series A Stage 2019 Founded
Trajectory Signals Strength Moderate

Confidence: Medium

Post-Quantum

post-quantum.com

Quantum-safe cybersecurity company building post-quantum cryptography products and migration tooling for protecting communications and critical infrastructure.

11-50 employees Employees Unknown Stage 2009 Founded
Trajectory Signals Strength Slight

Confidence: Medium

QNu Labs

qnulabs.com

QNu Labs builds quantum-safe cryptography infrastructure, including quantum key distribution (QKD), quantum random number generation (QRNG), post-quantum cryptography (PQC), and an integrated quantum security platform for enterprises and government.

51-200 employees Employees Series A Stage 2016 Founded
Trajectory Signals Strength Moderate

Confidence: Medium

QuintessenceLabs

quintessencelabs.com

QuintessenceLabs is an Australian quantum cybersecurity company that builds quantum-resilient data protection products, including quantum key generation, crypto-agile key management, quantum key distribution, and quantum random number generation.

51-200 employees Employees Unknown Stage 2008 Founded
Trajectory Signals Strength Slight

Confidence: Low

BTQ Technologies Corp.

btq.com

BTQ develops post-quantum cryptography and quantum-native infrastructure, including quantum-secure hardware, secure networks, and quantum randomness tools designed to protect critical systems against future quantum attacks.

Unknown Employees Unknown Stage 2021 Founded
Trajectory Signals Strength Moderate

Confidence: Medium

ThinkQuantum S.r.l.

thinkquantum.com

ThinkQuantum is an Italian quantum-security startup that designs, develops, and markets quantum key distribution (QKD) systems, satellite/space quantum communications, and quantum random number generation (QRNG) devices for secure communications.

11-50 employees Employees Unknown Stage 2021 Founded
Trajectory Signals Strength Moderate

Confidence: Medium

KEEQuant GmbH

keequant.com

KEEQuant develops and supplies quantum key distribution (QKD) and key management systems, with hybrid post-quantum cryptography (PQC) integration for quantum-safe communications.

11-50 employees Employees Unknown Stage 2020 Founded
Trajectory Signals Strength Moderate

Confidence: Medium

Quantum Dice

quantum-dice.com

Quantum Dice builds quantum random-number-generation and probabilistic-computing hardware, commercializing patented quantum entropy technology for high-assurance cybersecurity and related security applications. ([quantum-dice.com](https://quantum-dice.com/about))

11-50 employees Employees Unknown Stage 2020 Founded
Trajectory Signals Strength Moderate

Confidence: Medium

Xiphera

xiphera.com

Xiphera designs and implements hardware-based cryptographic security IP cores for FPGA and ASIC environments, including post-quantum cryptography and other quantum-resilient security solutions.

11-50 employees Employees Seed Stage 2017 Founded
Trajectory Signals Strength Moderate

Confidence: Medium

Qrypt

qrypt.com

Qrypt builds quantum-secure encryption and entropy infrastructure, including quantum entropy services, key-generation tooling, and digital quantum key distribution to protect data against post-quantum threats.

11-50 employees Employees Unknown Stage 2017 Founded
Trajectory Signals Strength Slight

Confidence: Medium

LuxQuanta

luxquanta.com

LuxQuanta is a European quantum security company that develops Quantum Key Distribution (QKD) systems and related quantum-safe cryptographic technologies for protecting critical communications infrastructure.

40+ employees Employees Series A Stage 2021 Founded
Trajectory Signals Strength Moderate

Confidence: Medium

Investors

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Top-tier investors who invested

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Other investors

Funding & Exits

Jun 2026
May 2026

Quantum Bridge Technologies Inc.

Series A

$8M • Investors: Primo Capital SGR, Wayra, Cadenza VC, Club degli Investitori, HPE, Bacchus Venture Capital

Quantum Bridge
Jan 2026

Project Eleven

Series A

$20M • Investors: Castle Island Ventures, Coinbase Ventures, Fin Capital, Variant, Quantonation, Nebular, Formation, Lattice Fund, Satstreet Ventures, Nascent Ventures, Balaji Srinivasan

Project Eleven

Q*Bird

EIC Accelerator blended finance

EUR 7.5M • Investors: European Innovation Council Accelerator

Q*Bird
Dec 2025
Oct 2025

LuxQuanta

Series A

EUR 8M • Investors: Big Sur Ventures, A&G, GMV, Wayra, EIC Fund, Corning, GTD

LuxQuanta
Sep 2025
Jun 2025

Project Eleven

Seed

$6M • Investors: Variant, Quantonation, Castle Island Ventures, Nebular, Formation

Project Eleven
Apr 2025

QuintessenceLabs

Series B2

AUD 20M • Investors: National Reconstruction Fund Corporation

QuintessenceLabs

QNu Labs

Series A

600M INR • Investors: National Quantum Mission, Lucky Investment, Speciale Invest, Tenacity Ventures, Singularity AMC

The Economic Times
Mar 2025
Feb 2025

QuSecure

Series A

$28M • Investors: Two Bear Capital, Accenture Ventures

QuSecure
Jan 2025

BTQ Technologies Corp.

Acquisition

Acquirer: BTQ Technologies Corp. • Status: Completed

Newswire.ca

Q*Bird

Grant

EUR 1M • Investors: Kansen voor West, European Regional Development Fund

Q*Bird
Jun 2024

PQShield

Series B

$37M • Investors: Addition, Chevron Technology Ventures, Legal and General, Braavos UK, Oxford Science Enterprises

PQShield
May 2024

Q*Bird

Seed round

EUR 2.5M • Investors: QDNL Participations, Cottonwood Technology Fund, InnovationQuarter

Q*Bird
Mar 2024
Dec 2023

QNu Labs

Pre-Series A1

$6.5M • Investors: Ashish Kacholia, Lucky Investments, Speciale Invest, Family fund

Entrackr
Nov 2023

CryptoNext Security

Series A

EUR 11M • Investors: AVP (AXA Venture Partners), Quantonation, Auriga Cyber Ventures

CryptoNext Security
Sep 2023
May 2023

VeriQloud

Seed

EUR 1.9M • Investors: Quantonation, WinEquity

Quantonation
Feb 2023
Jan 2023
Dec 2022
Nov 2022
Oct 2022
Sep 2022
Aug 2022

evolutionQ

Series A

$5.5M • Investors: Quantonation, The Group Ventures, SandboxAQ

evolutionQ
Jul 2022
Jun 2022

Xiphera

late seed

EUR 480K • Investors: Gorilla Capital, Korpun Seed Ltd (SijoittajaPRO Corporate Finance), Ääkköset Oy, individual investors

Xiphera
Mar 2022
Jan 2022

PQShield

Series A

$20M • Investors: Addition, Oxford Science Enterprises, Crane

PQShield
Nov 2021

Quside

Public financing

EUR 1.5M • Investors: Department of Business and Labor in Catalonia, AVANÇSA

Quside
Oct 2021

QuintessenceLabs

Series B

AUD 25M • Investors: Main Sequence Ventures, TELUS Ventures, InterValley Ventures, Capital Property Group

Business Wire
Jul 2021
Jun 2021
May 2021

ThinkQuantum S.r.l.

Founding capitalization

EUR 320K • Investors: Officina Stellare S.p.A.

Teleborsa
Jan 2021

KETS Quantum Security

equity funding

GBP 3.1M • Investors: leading European quantum and deep-tech specialist VCs

SETsquared Bristol
Aug 2020
Jul 2020

PQShield

Seed

GBP 5.5M • Investors: Kindred Capital, Crane Venture Partners, Oxford Sciences Innovation, Andre Crawford-Brunt

PQShield
Mar 2020
Jul 2019
Dec 2018

KETS Quantum Security

Seed

GBP 2M • Investors: Quantonation, Kx, Innovate UK, Industrial Strategy Challenge Fund

Quantonation press release
Sep 2018
Jan 2018

QuintessenceLabs

Grant

AUD 528K • Investors: Australian Department of Defence

QuintessenceLabs
Jul 2017

QuintessenceLabs

Grant

AUD 3.3M • Investors: Australian Department of Defence

GlobeNewswire
Jan 2017
Jul 2016

Post-Quantum

Series A

$10.3M • Investors: A M Partners, VMS Investment Group

TechCrunch
Jan 2016
Jun 2015
Feb 2014
Jan 2012
Jan 2010
Dec 2009
Jun 2008

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