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Privacy Policy

What does this privacy policy cover?

Criteo takes your privacy very seriously. This privacy policy governs and details the main privacy principles we apply to the data we collect through our services.

To access our privacy policy governing our corporate website only please click here.

About Criteo’s services

Criteo specializes in creating personalized advertisements. We work with online partners to build advertisements for users who visit their website or mobile applications and with publishers to display personalized advertisements.

Our aim is to deliver advertisements by displaying products and/or personalized banners that you might be interested in, based on your recent browsing behavior. For example, if you visit and browse on Website/mobile application A, on a subsequent online visit to Website/mobile application B, you will see ads personalized by your browsing history on Website/mobile application A.

With our service, you should receive personalized ads that are more relevant for you than the standard advertising you would receive without Criteo. Click here for more information on Interest Based Advertising

User Choices

If you do not want to receive ads displayed by Criteo, on your current browser and browsers we have matched to your technical identifier you can disable the display of Criteo ads here.

If you only want to opt out from your current browser uncheck the box.


  • You just disabled Criteo Service on your current browser and browsers we have matched to your technical identifier. Please note that the opt out on matched browsers will be effective as soon as we see you on these browsers again if this happens within 6 weeks.
  • You just disabled the Criteo service on your current browser.
  • You just enabled the Criteo service on your current browser.
  • Sorry, unable to process your request. Please try later.

More about user choices

Your options to disable the display of Criteo advertisements.

Please note: that each environment is separate. If you do not want to receive Criteo ads whatever device, browser used you must disable our services for both the online web and mobile app environments.

Online web environment: (desktop, tablet, and smartphone browsers)

Please note: when you opt out as instructed in this section, a cookie will be set on your browser. We must maintain the cookie on your browser in order to recognize you as having opted out from our service. You must opt out again if you clear that cookie from your browser, use a different internet browser, or use a new computer to access the internet.

Please note that this procedure will only block ads that are displayed by Criteo. If you chose to opt out matched browsers, please note :

  • that your opt-out on these matched browsers will be effective as soon as we see you again on these browsers if this happens within 6 weeks ;
  • and that you may nonetheless continue to have cookies on other unmatched browsers and see ads displayed by Criteo on these browsers.

You can also opt out of Criteo’s service by visiting the following links. Please note that these platforms allow you to opt out of interest-based advertising delivered by registered members on the current browser you are using.

For US:

For EU:

You may also want to use browser settings to modify your preferences. At Criteo our goal is to offer a harmonized online experience whatever browser you use. Most browsers accept our cookies by default but in certain cases, like Safari, our cookies are blocked by default by the browser settings (and potentially without your knowledge). In these situations we will inform you before we drop our cookies so that you can tell us either that you want to experience our ads, or opt-out of our services by using the Criteo opt-out. In cases where you interact with our service and want to experience our personalized ads your browser settings may nonetheless be configured to block certain third party cookies. In this situation, the most efficient way to disable our ads in for these browsers is by using our Opt-out.

As described above, we elected to provide mechanisms of choice through our proprietary opt out and through industry platforms and do not respond to web browser do not track signals.

Other environments (Mobile applications)

Please note: to opt-out from advertising served by Criteo in mobile applications, you must be browsing in applications.

If you no longer want to be exposed to Criteo personalized banners in the mobile application environment, you can opt out simply by clicking on the opt-out button accessible through the ad choices icons integrated in all our banners. (see complementary options for iOS and Android here under)

Please note that this procedure will only block ads that are displayed by Criteo. If you want to disable more services, please refer to your operating system settings, or follow instructions below. Your opt-out will be stored server side linked to your device ID.

Android Users (version 2.3 and above)

To use the “opt-out of interest-based advertising” option, follow the instructions provided by Google here: Google Play Help. If you don’t have the Google Play Services installed on your device, you won’t receive Criteo services.

Please note that this is a device setting and will disable interest-based ads from all providers, and not just for Criteo

iOS users (version 6 and above)

To use the “Limit Ad-Tracking” option, follow the instructions provided by Apple here: Apple Support Center

Please note that this is a device setting and will disable interest-based ads from all providers, and not just for Criteo

Other Platforms

Criteo services only work with iOS (version 6 and above), so we do not provide interest-based ads on other platforms.

Our Technology

We collect information via anonymous cookies placed on your browser.

Online web environment: (desktop, tablet, and smartphone browsers)

Criteo “tags” visitors to its partners’ websites with browser cookies. Users tagged by Criteo are given a technical identifier. At no point does Criteo collect identifying personal data such as your name or address.

The browser cookies track the products viewed by the visitor and pages visited of the partner for whom Criteo is delivering ads. Pixel tags are used by Criteo to transfer browsing data from visitors of our partner's websites to Criteo's servers.

What are cookies? A cookie is a small text file stored on a user’s computer for record-keeping purposes. There are two types of cookies:

  • Session cookies are used to make it easier for you to navigate on websites. A session ID cookie expires when you close your browser.
  • Persistent cookies are used to run our technology as they enable us to track and target the interests of our users to enhance the experience on our partners’ websites. Persistent cookies remain on your hard drive for an extended period of time. You can remove persistent cookies by following the directions provided in your internet browser’s ‘help’ file.

What are pixel tags? A pixel tag (also commonly known as a web beacon) is an industry-standard, often-transparent graphic image usually no larger than a 1x1 pixel that is placed in a website.

Our partners’ advertisements are displayed on many websites, also known as “publishers.” These publishers may also place cookies on your browser. These cookies are there so that the publishers recognize that Criteo has a personalized advertisement available for your browser.

Browser matching: (desktop, tablet, and smartphone browsers)

To serve you our personalized advertisements and provide a harmonized web experience we may match your identifiers on the different browsers you are using. At no point we collect identifying personal data such as your name or address to operate the matching. We use exact matching methods by leveraging our advertising partner’s identifiers or email hash that they may pass to us. See data collection paragraph to learn more. Matching your devices only works in the online environement (browser to browser) ; mobile application environment remains separate.

Other environments (Mobile applications)

In environments that do not support cookies, like mobile applications, we may use other similar technologies for the same purpose of cookies. To serve our ads in mobile applications we collect identifiers, such as Google Advertising ID or IDFA depending on the operating system of your mobile device. These identifiers consist in a string of technical and random characters singling out your device that Criteo stored by Criteo with a hash (non reversible encrypting method). 

Data collection & use

We do not know who you are. We collect and use technical data relating to your browsing navigation to display personalized advertisements.

We collect browsing information

We only collect data related to your browsing activity through cookies or equivalent identifiers that record:

  • events related to your activity on the partner’s website (such as the number of pages viewed, the products you viewed on that website, your searches made on the partner’s website)
  • information related to your device (device type, operating system, version)
  • and events related to the Criteo ad serving activity such as the number of ads displayed to you.

We also collect technical user identifiers from our partners for the purpose of matching the browsers you use and serve you relevant ads based on your behaviour accross browsers. For that purpose we process and store

  • CRM ID of our advertising partners, and/or a hashed version of your CRM ID or of your email address – the hashing method used is the MD5 which is a non reversible encrypting method. CRM ID or MD5 of your email correspond to a series of characters that does not permit your identification. For eg : a hash of name@mail.com would be 95ad3e9a65078288849e0ce56cf032c4

We do not collect any identifying information

We do not know who you are. We do not know your address, your place of work, your date of birth, your email address, your phone number. We do not use or store your IP address for targeting purposes*. 

We do not collect hardware-based identifiers such as UDID, Mac Address. 

We do not collect sensitive information (such as religion, political opinion, health…).


We collect this information in order to increase the relevancy of the ads being displayed to you.

The data we collect is also used for reporting purposes, and to give our clients and partners more information about the performance of their advertising campaigns, and to improve performance over time.

We do not create segments to specifically target children under 13 years old.

We do not process any information which could be used by Criteo, directly or indirectly, with the help of a third party or otherwise, to determine the personal identity of users.

We share information collected with our subsidiaries or affiliated companies. We share aggregated data with our partners, i.e. data that does not permit identification of a partner, or permit you to be identified. We share non-aggregated data only upon approval of our partners and in compliance with our commercial agreements.

We partner with Ad exchanges platforms to buy ad placements through auctions. Before the auction we match our ID with the ad exchange platform and then participate to the auction by sending the bid price and the banner code to display.

*In compliance with the best industry standards, we use IP addresses:

  • For fraud detection purposes (and not for targeting purposes) to help alert us to situations which could not have been caused by human behavior, such as a massive amount of clicking in a limited period of time; or
  • To extract geographical information.

Criteo commitments and adherence

Criteo is an early adopter to initiatives of greater transparency and control for users.

Criteo supports initiatives of greater transparency and control for users and in particular has been an early adopter to the following initiatives: 

 undefined   The Digital Advertising Alliance

Criteo adheres to the Digital Advertising Alliance Self-Regulatory Principles for Online Behavioral Advertising. Criteo subscribes to the DAA opt-out platform which offers the consumer a choice page to opt out from advertising services, and general information related to privacy.

 undefined   The Network Advertising Initiative

Criteo adheres to the Network Advertising Initiative Standards (NAI Code of Conduct, Mobile Application Code). NAI offers an online web opt-out platform to allow consumers to express their choices and provides general information related to privacy and Interest Based Advertising.

 undefined The IAB Europe

Criteo belongs to the IAB Europe and conforms to the OBA Framework. The IAB Europe offers consumers an online web opt-out platform and provides general information to consumers about privacy tools.

  undefined EDAA

Criteo is also a member of the European Digital Advertising Alliance (“EDAA”) and is in compliance the EDAA’s Self-Regulatory Principles. Criteo received independant data protection EDAA certification.

EDAA was founded by a European industry coalition representing advertisers, the advertising agency sector, the direct marketing sector, the advertising network sector and the media sector.

EDAA offers consumers an online web opt-out platform and provides general information to consumers about privacy tools.

 undefined SafeHarbor

EU Safe Harbor Criteo complies with the U.S.-EU Safe Harbor Framework and the U.S.-Swiss Safe Harbor Framework as set forth by the U.S. Department of Commerce regarding the collection, use, and retention of Personal Information from European Union member countries and Switzerland. To learn more about the Safe Harbor program, and to view our certification page, please visit https://safeharbor.export.gov/list.aspx

 undefined TRUSTe

Criteo has been awarded TRUSTe's Privacy Seal signifying that this privacy policy and practices have been reviewed by TRUSTe for compliance with TRUSTe's program requirements including transparency, accountability and choice regarding the collection and use of your information.

TRUSTe's program covers the collection and use of information by Criteo from third party desktop websites via their services.

Data security and retention

The security of your information is fundamental to Criteo. We have implemented industry-standard security measures, which include the use of firewalls and encryption.

We retain the technical data that we collect for up to 13 months from the date of collection. Our cookies expire 13 months after they are last updated.

In the case of fraud detection, IP address may be retained for a maximum of 6 months for the purpose of investigating potentially fraudulent activity. The IP address is processed by teams separate to those responsible for the Criteo algorithm.

Please note that we may update or change this privacy policy. If we revise our privacy policy, we will post those changes to this privacy statement, and to other places we deem appropriate, so that you are aware of what information we collect, how we use it, and under what circumstances, if any we disclose it. If we make any material changes we will notify you by means of a notice on this site prior to the change becoming effective. Please click here for the latest version of the privacy policy.

Last updated: 26/11/2014

Contact us

For any questions on this privacy policy:

By email: cil@criteo.com
By mail: CIL-CRITEO – 32 Rue Blanche -75009 Paris- France

If you are not satisfied with our response you can contact TRUSTe.