Understanding: First party vs. third party cookies

Updated by Anton Lauritsen

In this article, we'll describe what is meant by first and third-party cookies.

What are first-party and third-party cookies?

These are set by the publisher’s web server (or any JavaScript loaded on the website). 

First-party cookies:

  • Available to the domain that created it 
  • Supported by all browsers
  • Can be blocked or deleted by the user 
  • Used for login, tracking, target experiences and more
Dreamdata only uses first-party cookies

Third-party cookies, on the other hand, are set via code loaded on the publisher’s website or by a third-party server - eg. AdTech vendor

Third-party cookies:

  • Accessible on any website that loads third-party server’s code
  • Supported by all browsers, many block the creation of third-party cookies by default.
  • Users are also able to delete third-party cookies on their own.
Chrome plans to disable third-party cookies for 1% of users from Q1 2024 for testing, with a view to disable 100% of users from Q3 2024.

We are always here to help so please reach out to friends@dreamdata.io with any questions or requests!

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