Last Updated: May 18, 2018; Effective: May 25, 2018

This Cookie Policy describes the different types of cookies that may be applied on the equipment of consumers who visit and any other websites (the “Sites”) owned and operated by PubMatic, Inc. and its affiliates (collectively, “PubMatic”).

We may update this Cookie Policy from time to time in order to reflect, for example, changes to the cookies we use or for other operational, legal or regulatory reasons.   Please therefore re-visit this Cookie Policy regularly to stay informed about our use of cookies and similar technologies. The date at the top of this Cookie Policy indicates when it was last updated.

If you have any further queries, please contact us by email at, or write to us at the following address:

PubMatic, Inc. c/o Privacy
601 Marshall Street
Redwood City, California 94063, USA

Some cookies that we use through the Sites will collect personal information about you, or information that becomes personal information if we combine it with other data. Any personal information that we collect will be used in accordance with our Privacy Policy.

For information about cookies that may be applied through the PubMatic technology platform, see our Platform Cookie and Other Similar Technologies Policy.


Cookies are a standard feature of websites that allow us to collect certain information from your browser or device when you visit our Sites.  In relation to the use of cookies by our partners and clients, note that we do not have access or control over these cookies.


We use a variety of cookies on the PubMatic Sites for several reasons.  We also may use web logs, pixel tags, or web beacons, which are pieces of code that may be used to read and place cookies on a web browser, to collect information about how you interact with websites or advertisements.

The sections below describe the types of cookies most frequently used by PubMatic on the Sites and explain their use.

Essential Cookies

We use cookies that are essential to making the Sites work.  These types of cookies enable you to move around the Sites and use their features.  For example, we may use cookies to record a user login, manage user sessions, authenticate users of our management apps, or adjust settings and functionality on the Sites.  Without these cookies, we may not be able to provide the services that are necessary for you to be able to use the Sites, such as signing into your account.

Preference Cookies

We also use cookies that collect information about your choices and preferences.  These cookies allow us to remember language or other local settings and customize the Sites accordingly.  For example, we may store settings and preferences of our logged in users.

Social Media Cookies

Some of the pages on the Sites contain tools or applications that are linked to third-party social media service providers such as Facebook, Twitter and LinkedIn.  The social media service provider may set its own cookies on your computer or device through these tools or applications.  You should check the social media service provider’s website for further details about how they use cookies.

Cookie Names
Facebook Social Plugins Enables visitors to engage with us via Facebook and show visitors relevant ads and personalized content on Facebook. To learn more about Facebook’s practices and to opt out, please visit and
Linkedin Widgets Enables visitors to engage with us via LinkedIn and show visitors relevant ads and personalized content on LinkedIn. To learn more about LinkedIn’s practices and to opt out, please visit and
Twitter Button Enables visitors to engage with us via Twitter and show visitors relevant ads and personalized content on Twitter. To learn more about Twitter’s practices and to opt out, please visit and select “Do Not Track” in certain browser settings.

Analytics Cookies

These cookies collect information about how people are using the Sites, for example which pages are visited the most often, how visitors move from one webpage to another, and whether visitors experience any difficulty using the Sites. Overall, these cookies provide us with analytical information about how the Sites are performing and how we can improve it, and in some instances, whether our advertising is effective or not.

Cookie Names
Engagio [ei_client_id] These cookies are associated with account-based marketing services provided by Engagio. Engagio cookies collect information that is used either in aggregate form to help us understand how our websites are being used, or to measure the effectiveness of our marketing campaigns.

To learn more about how Engagio uses cookies, please visit

Google Analytics [_ga.js] We use Google Analytics cookies to collect aggregate statistical data about how visitors use the Sites so that we can improve the user experience and serve up the content our visitors find most useful. Google Analytics cookies store information such as what pages users visit, how long they are on the Sites, how they arrived at the Sites, and what they click on.

To learn more about Google’s practices and to opt out, please visit, analytics/devguides/collection/analyticsjs/cookie-usage, and

The following cookies may be used in connection with Google Analytics:

[_utma] Used to distinguish users and sessions.

[_utmb] Used to determine new sessions/visits.

[_utmc] Not used in ga.js. Set for interoperability with urchin.js. Historically, this cookie operated in conjunction with the __utmb cookie to determine whether the user was in a new session/visit.

[_utmt] Used to throttle request rate (e.g., to reduce the frequency with which a browser may request data from the server).

[_utmz] Stores the traffic source or indicates the advertising campaign that explains how the user reached our Sites.

Pardot [“visitor_id,” “pi_opt_in,” and “pardot”] These cookies are associated with an email marketing service provided by Pardot. These tracking cookies allow a website to link visitor behavior to the recipient of an email marketing campaign, in order to measure campaign effectiveness.  To opt out of this tracking, please select “Do Not Track” in certain browser settings.  To learn more about how Pardot uses cookies, please visit and 2125923-how-does-pardot-track-activities-.
SmartRecruiters We use SmartRecruiters to help us manage our careers page and job application process.  SmartRecruiters uses cookies to identify users. When a user located in one of the European countries who have adopted EU Data Protection Directive 95/46/EC accesses SmartRecruiters, the company will display a notification with a link to SmartRecruiters’ cookie policy. The notification is localized to the language of the user’s browser.

To  learn more about how SmartRecruiters uses cookies, please visit Configuration/ Global_Compliance_Administration/ What_is_SmartRecruiters’_ Cookie_Policy%3F.

Stat Counter This cookie is used only to determine first-time and returning visitors and to estimate unique visits to the site. To learn more about StatCounter’s practices and to opt out, please visit

Advertising Cookies

We may partner with certain third parties to deliver advertising that we believe may interest you based on your activity on our Sites and other websites over time. These third parties may set and access cookies on your computer or other device and may also use web logs, pixel tags, or web beacons. These cookies are used to deliver advertisements that are more relevant to you and your interests. They are also used to limit the number of times you see an advertisement as well as to help measure the effectiveness of the advertising campaign.

Cookie Names
Quantcast [_qca] This is a cookie associated with Quantcast, a digital advertising company. Quantcast provides website rankings, and the data the cookie collects is also used for audience segmentation and targeted advertising. To learn more about Quantcast’s practices and to opt out, please visit


You have the right to decide whether to accept or reject cookies. In addition to the options provided above, you may refuse or accept cookies from the Sites at any time by activating settings on your browser.  Information about the procedure to follow in order to enable or disable cookies can be found on your Internet browser provider’s website via your help screen.  You may wish to refer to for information on commonly used browsers.  Please be aware that if cookies are disabled, some website features may not operate as intended.