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About

About this directory

Kvantiq Directory is a curated, open directory of the European quantum computing ecosystem. It is maintained by Kvantiq Studio ApS, a Danish quantum technology company. The directory is free to use and contains no third-party tracking.

Directory at a glance

224

verified entries across the European ecosystem

Last verified

  • 110

    Companies

  • 39

    Benchmarks

  • 23

    Use cases

  • 10

    Challenges

  • 42

    Resources

Why this directory exists

An open, checkable record of the European ecosystem

Europe's quantum sector is spread across national programmes, university spinouts and early-stage companies, and the public record of who is doing what is scattered — a press release here, a funding database there, much of it paywalled or self-reported.

This directory is one attempt at a public answer you can check. It tracks 110 companies across 14 countries, shows the sources behind every entry, and withholds any entry that fewer than three credible sources can substantiate — those are listed openly on the audit dashboard rather than quietly dropped. It is free and carries no third-party tracking.

Did you know?

14

European countries have active quantum computing companies

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The directory covers companies from 14 countries — from Finland's superconducting qubit pioneers to Spain's quantum optimization startups. The largest clusters are in DACH (28), Nordics (36), and Western Europe (25).

Quantum fact

2x

minimum verified sources per entry

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Every entry in this directory requires at least two independently verified sources — company websites, peer-reviewed papers, EU project databases, or major tech press. No self-reported data. No unverified press releases. This is what sets Kvantiq apart from aggregator-style directories.

Methodology

How entries are researched and verified

Collection

Every entry is independently researched by the Kvantiq Studio team from primary sources: official company websites, peer-reviewed publications, EU project databases (Quantum Flagship, EuroHPC, BMBF), and major tech press (Nature, Science, TechCrunch). No self-reported data or press releases taken at face value.

Verification

All entries require a minimum of two independently verified sources. Citations follow numbered APS/IEEE style — the standard in physics and quantum computing. Where available, we link to DOI-resolved papers and arXiv preprints. Every source includes a dateAccessed field.

Inclusion

Companies must have an active website, verifiable operations, and a clear quantum computing focus. Early-stage startups without public visibility are excluded until they reach a verifiable threshold. Benchmarks must have published methodology and ideally reproducible code.

Updates

The directory is updated periodically. Each cycle re-verifies existing entries and adds new ones. The build system validates all content against strict Zod schemas — malformed data cannot be published.

Geographic scope

Strongest in the Nordics and DACH, across 14 countries

Company coverage by region:

nordics 36

dach 28

western europe 25

uk 11

southern europe 8

eastern europe 2

Ethics policy

What we will and will not do

European-first, open-source preferred
We prioritize European companies and open-source projects in our curation and affiliate linking.
No visitor tracking
No Google Analytics. No Facebook pixels. No third-party tracking of any kind. Privacy-respecting analytics only.
Ethical advertising only
No Google AdSense. Only contextual, privacy-respecting ad networks — EthicalAds or Carbon Ads.
Transparent linking
Companies on the blocklist (surveillance-capitalism firms) are referenced via privacy-preserving search links, not direct referrals. Their open-source frameworks keep direct links.

Know a company, benchmark, or resource that should be listed? Submit a listing.