Understanding: First party vs. third party cookies

Updated by Anton Lauritsen

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

What are first-party and third-party cookies?

Note: Google plans to disable third-party cookies for 1% of users in 2024 for testing, with a goal phaseout third-party cookies in H1 2025. Read more here.

Dreamdata only uses first-party cookies. That means that if you're using Dreamdata's tracking script this will still work after Google has disabled third party cookies in Chrome.

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

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.

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

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