# About Quantum Companies

## What Quantum Companies is

Quantum Companies is a directory of quantum technology companies: quantum computer makers (superconducting, trapped-ion, neutral-atom, photonic, spin and topological), quantum software and algorithms, quantum cloud access, quantum sensing and metrology, quantum networking and QKD, post-quantum cryptography vendors, cryogenics, lasers, control electronics and other component suppliers, and quantum consulting and training. Each listing page shows what we know about one quantum company.

## Where the data comes from

We take records from the sources below.

- [Business websites](https://quantumcompanies.fyi/). License: Business website facts; website text and images retain their original rights.. Data updated by hand.
- [Overture Maps](https://docs.overturemaps.org/attribution/). License: CDLA-Permissive-2.0 / ODbL; retain the licence and attribution for each source record.. Data refreshed monthly.

## A listing is a record, not an endorsement

A listing shows what we know about one quantum company. It does not mean that we recommend it.

## How a listing is checked

Every published listing has its own page, and search engines can index it.

Our team reviews each new listing before it goes live.

An owner proves control of a listing with an email address on the business domain or a manual check by our team.

An owner change to the name, phone, website, street address, address line 2, city, region, postal code and country goes to review before it shows.

## Claim or correct a quantum company

To claim a listing that is unclaimed, open it and select "Claim this listing".

To report a mistake, open the listing and select "Suggest a change".

You can also write to us at support@quantumcompanies.fyi.

- [Find your quantum company](https://quantumcompanies.fyi/search)
- [Add a quantum company](https://quantumcompanies.fyi/submit). Tell us about a quantum company we do not list.
- [Contact us](https://quantumcompanies.fyi/contact)

Also on the [web page](https://quantumcompanies.fyi/about).