Cookie policy

Effective date: this cookie notice was last updated on 22 January 2024

This Cookie Notice applies to the main Human Cell Atlas website ( You may access and change your cookie preferences at any time.

If you visit the HCA Data Portal (, additional cookies may be set. Please see the Data Portal Privacy Policy for more information.

What are cookies?

Human Cell Atlas (also referred to as “we” or “us“) uses cookies and other similar technologies on its website. A cookie is a very small text document, which often includes an anonymous unique identifier. Cookies are created when your browser loads a particular website. The website sends information to the browser which then creates a text file. Every time the user goes back to the same website, the browser retrieves and sends this file to the website’s server. Find out more about the use of cookies on If you would like more information about our privacy practices, please consult our Privacy Notice.

What cookies do we use and what information do they collect?


  • Strictly necessary cookies: these cookies are required to enable core functionality. Without these cookies, services you have asked for, like cookies that allow you to access secure areas of our website, cannot be provided. If you disable these cookies certain parts of the website will not function for you.
  • Analytics cookies: these cookies help us improve or optimise the experience we provide. They allow us to measure how visitors interact with the website and we use this information to improve the user experience and performance of the website.
Cookie name Provider Purpose Category Expiration
CookiePolicy Human Cell Atlas To verify if the user has read the information regarding cookies, and what cookie preferences they have selected Strictly necessary 2038/01/19
fs_cookie_* Human Cell Atlas To remember form data that has been entered by the user Strictly necessary 3 days
_pk_id..* Matomo Analytics To collect information and report website usage statistics Analytics 13 months
_pk_ses..* Matomo Analytics To collect information and report website usage statistics Analytics 30 minutes

Matomo Analytics

We use Matomo ( to help us understand how visitors navigate our websites. It uses analytics cookies to collect information and report website usage statistics. The information is processed and stored onsite in our UK data center.

How can you manage your cookie preferences?

When you visit our website, you are asked to fully or partially accept or decline that cookies will be placed on your devices. However, it is not possible to decline cookies that are strictly necessary to provide the functionality of the website. In case you have consented to the use of other cookies, you can always withdraw your consent by changing your preferences.

You can also change the settings of your internet browser to prevent cookies from being placed on your devices. In addition, you can delete cookies that have already been set on your devices. Please click on the links below in order to know how you can delete or block cookies in the most common browsers: