Privacy Statement

We at Euclid are a team of software engineers, data scientists, product managers, and entrepreneurs. But we're also regular people and full-time consumers who understand privacy concerns. We've designed our product from the very beginning to protect data privacy. To do that, we follow three principles:

  • We are interested in how large groups of people behave.  We are not in the business of learning about who you are or where you go.
  • We share only aggregated data, not data about your device.
  • You can opt out of participation in this data collection.

If you have any questions, please contact us at

When you walk with your mobile device (with its Wi-Fi function enabled) into a retail space that uses our technology, Euclid senses the following: the presence of the device, its signal strength, its manufacturer (Apple, Samsung, etc.), and a unique identifier known as its Media Access Control (MAC) address. This combination of numbers and letters identifies a specific device to the surrounding Wi-Fi networks. Because the MAC address does not disclose the device owner's real-world identity, that information is never collected. You can find more information about MAC addresses on Wikipedia or feel free to contact us.

Euclid collects and aggregates data into reports for retail clients. These reports are used to improve store layouts, determine timing for promotions and sales, measure the effects of advertising, and set staffing levels and store hours.

When any Wi-Fi-enabled mobile device (such as a smartphone, tablet, or computer) is turned on, it regularly sends signals to announce its presence to nearby wireless networks. Euclid can sense when Wi-Fi-enabled devices make a signal. Euclid saves the information embedded in the signal, including a device's unique MAC address. Euclid promptly hashes the MAC addresses it collects and then transmits it to a database. The data is then used to produce the reports for our retail clients. We contractually prohibit downstream recipients from attempting to use the data to identify a particular individual.

Euclid's software was specially written to limit the sensor to collect only the data we need to improve client operations. At no point is your name, phone number, or any other personal information collected by Euclid.

Our clients use the reports that Euclid generates to answer questions such as: How many new shoppers did I have this week vs. last week? Do more people stop and enter the store with one window display vs. another? How well did my marketing campaign work?

Answering these questions requires no personal information of any kind. We only need to determine the amount of traffic that came into the store.

We share information only with our clients—the retailers from whose stores the data is captured. When Euclid provides a third party with an analysis of foot-traffic trends, it never includes device-specific data nor any names of stores included in the analysis. Only aggregated data is used.

We do not sell, rent, or otherwise disclose device-specific information to third parties.

We only use qualified, respected 3rd-party providers (such as Amazon Web Services) for data exchange, aggregation, and storage, which are necessary to provide Euclid's services. Read more about Amazon’s security measures.

Before being stored on Amazon Web Services, data is transferred securely (using SSL) and is then "hashed," or scrambled into a meaningless string of numbers and letters. Once a MAC address is hashed, Euclid will not attempt to re-identify the original MAC address from that data.

We retain data from individually hashed MAC addresses for 24 months, unless we have to keep the information for legal purposes. After 24 months, we only retain data about hashed MAC addresses in aggregate form.

Euclid does not respond to government requests unless we believe in good faith that a response is mandated by law. We require a warrant or court order before disclosing any of the limited amount of device location data that we possess.

In an effort to protect consumer privacy, Euclid complies with the Mobile Location Analytics Code of Conduct. This code was established as an industry-wide standard for protecting the privacy of consumers when dealing with their mobile device data. It also defines rules of engagement for technology companies like Euclid to inform consumers about foot-traffic analysis and provide an easy way to opt out.

Yes. You can opt out by submitting your MAC address here. Euclid will remove any existing data about that MAC address and will collect no further data about that MAC address in the future.

Euclid complies with the US-EU Safe Harbor Framework and US-Swiss Safe Harbor Framework as set forth by the US Department of Commerce regarding the collection, use, and retention of personal information from European Union member countries and Switzerland. Euclid has certified that it adheres to the Safe Harbor Privacy Principles of notice, choice, onward transfer, security, data integrity, access, and enforcement. To learn more about the Safe Harbor program, and to view our certification page, please visit

In compliance with the US-EU and US-Swiss Safe Harbor Principles, Euclid commits to resolve complaints about your privacy and our collection or use of your personal information. European Union or Swiss citizens with inquiries or complaints regarding this privacy policy should first contact Euclid at

Euclid has further committed to refer unresolved privacy complaints under the US-EU and US-Swiss Safe Harbor Principles to an independent dispute resolution mechanism, the BBB EU SAFE HARBOR, operated by the Council of Better Business Bureaus. If you do not receive timely acknowledgment of your complaint, or if your complaint is not satisfactorily addressed by Euclid, please visit the BBB EU SAFE HARBOR web site at for more information and to file a complaint.

If you have any comments or questions, please contact us at

Thank you.

We self-certify compliance with