13 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 13 start-ups with an aggregate funding of $408.0m. The average funding per company in this subset is $31.4m.

Last update to the database: Jun 24, 2025. See changelog.

Track over 71,000 companies

Discover
Fast-growing Global startups

Seedtable uses technology and people to track over 71,000 companies to help you find the right ones to partner with.

Pricing + Sign up

2

Funding Rounds

$8.0m

Money raised

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

Key people:

5

Funding Rounds

$2.5m

Money raised

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

Key people:

1

Funding Rounds

$5.6m

Money raised

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

Location:

Key people:

3

Funding Rounds

$26.8m

Money raised

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

7

Funding Rounds

$249.3m

Money raised

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

4

Funding Rounds

$11.2m

Money raised

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.

3

Funding Rounds

$37.0m

Money raised

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.

1

Funding Rounds

$4.4m

Money raised

Company developing optical communications hardware for strong digital encryption.

Location:

Key people:

4

Funding Rounds

$27.6m

Money raised

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

Location:

Key people:

1

Funding Rounds

$18.8m

Money raised

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

Key people:

1

Funding Rounds

$2.1m

Money raised

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

Location:

Key people:

1

Funding Rounds

$4.8m

Money raised

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

1

Funding Rounds

$10.0m

Money raised

zeroRISC provides open-source silicon security solutions for cloud, IoT, and critical infrastructure device protection.

Sign up to access our full database

Enter your email and get access to 71,000 + technology companies you can partner with.

Join 29000+ founders, operators, and investors.