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CookiePro Knowledgebase

What’s the difference between first and third-party cookies?

Last Updated: October 15, 2019

The main differences between a first and third-party cookie include:

  • Setting the cookie
    • First-party cookies are set by the publisher’s web server or any JavaScript loaded in the website. Third-party cookies can be set by a third-party server, such as an AdTech vendor, via code loaded on the publisher’s website
  • Cookie availability
    • First-party cookies are available to the domain that created it. A third-party cookie accessible on any website that load the third-party server’s code
  • Browser support/blocking
    • First-party cookies are supported by all browsers and can be blocked or deleted by the user. Third-party cookies are supported by all browsers, but many are blocking the creation of third-party cookies by default. Users are also taking matters into their own hands and deleting third-party cookies on their own.

Learn About the Different Cookie Consent Models

At a first glance, it may seem that everyone is using the same cookie banner on their website, but there are in fact five main models for cookie law consent.

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