12 Best Post Quantum Cryptography Startups to Watch in 2025

The Definitive Seedtable Ranking of Post Quantum Cryptography Startups

We track 71,000+ companies and rank them dynamically using our Seedtable Score – a score that uses quantitative and qualitative data points to signal the momentum behind a company. We then monitor the list manually leveraging our expertise as founders and investors.

There are 12 start-ups with an aggregate funding of $398.0m. The average funding per company in this subset is $33.2m.

Last update to the database: Feb 18, 2025. See changelog.

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Crypto Quantique logo

Crypto Quantique

Crypto Quantique is a company that specializes in quantum cyber security.

2

Funding Rounds

$8.0m

Money raised

Agnostiq logo

Agnostiq

A company offering a platform for privacy and security for quantum cloud computing.

5

Funding Rounds

$2.5m

Money raised

ID Quantique (company) logo

ID Quantique (company)

ID Quantique is a company developing quantum cybersecurity products, quantum scientific instrumentation, and quantum random number generation.

1

Funding Rounds

$5.6m

Money raised

ISARA (company) logo

ISARA (company)

ISARA is a company developing quantum computer resistant software products founded in 2015 by Scott Totzke.

3

Funding Rounds

$26.8m

Money raised

InfiniQuant logo

InfiniQuant

InfiniQuant is a research team hosted in Christoph Marquardt’s Quantum Information Processing group at the Max Planck Institute for Science and Light.

7

Funding Rounds

$249.3m

Money raised

Post-Quantum logo

Post-Quantum

Post-Quantum is a company that is developing quantum-resistant encryption for protection against code-breaking quantum computers and quantum-resistant signature schemes for secure blockchain deployment.

4

Funding Rounds

$11.2m

Money raised

Quantum Xchange logo

Quantum Xchange

Quantum Xchange is a quantum fiber network that is based in the United States. It uses photons of light to physically transfer a shared secret between two entities.

3

Funding Rounds

$37.0m

Money raised

KETS Quantum Security logo

KETS Quantum Security

Company developing optical communications hardware for strong digital encryption.

1

Funding Rounds

$4.4m

Money raised

Pqshield Ltd logo

Pqshield Ltd

Pqshield Limited is an Oxford-based cryptography company using their cryptographic knowledge to develop cybersecurity solutions.

4

Funding Rounds

$27.6m

Money raised

QuintessenceLabs logo

QuintessenceLabs

QuintessenceLabs is a Deakin, Australian Capital Territory-based cybersecurity company that develops solutions in quantum security.

1

Funding Rounds

$18.8m

Money raised

VeriQloud logo

VeriQloud

VeriQloud is an applications and software for quantum networks founded in 2017 by Marc Kaplan.

1

Funding Rounds

$2.1m

Money raised

Cryptosense logo

Cryptosense

Cryptosense provides the first application security software dedicated to the detection and remediation of crypto vulnerabilities.

1

Funding Rounds

$4.8m

Money raised