Cookie Policy

Last updated: 9 November 2026

1. Purpose

Diametral takes the protection of personal data of visitors to its website diametral.com seriously.

This policy explains the trackers that may be set or read while browsing the website, their purposes and how you can manage your choices.

The data controller is Diametral, SAS, 251 boulevard Pereire, 75017 Paris. Contact: dpo@diametral.com.

2. What is a cookie?

A cookie is a small text file or a comparable identifier stored on your device when visiting a website. Other technologies that store or read information on the device, such as browser local storage (localStorage) or session storage (sessionStorage), are subject to the same rules.

Diametral uses trackers to:

  • ensure the security of the website and its forms;
  • remember your cookie choice;
  • measure audience and traffic sources where you have consented.

3. Applicable framework

The setting and reading of trackers on a device are governed by Article 5(3) of Directive 2002/58/EC, transposed into French law by Article 82 of Law No. 78-17 of 6 January 1978, known as the French Data Protection Act.

Your prior consent is required, except for trackers whose sole purpose is to enable or facilitate electronic communication or that are strictly necessary to provide the requested service. Consent must be freely given, specific, informed, unambiguous, and withdrawable at any time as easily as it was given (Articles 4(11) and 7 GDPR).

Trackers that store your choice and trackers that ensure service security, for example by limiting automated access, are not subject to consent.

4. Managing your choices

The website uses a consent management platform based on vanilla-cookieconsent (version 3.1.0).

The banner allows you to accept, reject or customise trackers subject to consent. The “Manage my cookies” link, available at the bottom of every page, allows you to change or withdraw your choice at any time.

By default, Google Consent Mode is set to “denied” for audience measurement, advertising, personalisation and functionality, while security remains allowed. Advertising data redaction (ads_data_redaction) is enabled.

Your choice, together with its date and a random consent identifier, is also recorded in a technical log hosted on Cloudflare Workers infrastructure in order to keep proof of consent.

5. Data that may be processed

Depending on the tracker and your choice, the following may be processed:

  • IP address and technical data relating to the device and browser;
  • random online identifiers;
  • date and time of visits;
  • pages viewed and referral website;
  • campaign parameters (UTM) and landing page;
  • the last offer viewed during the visit;
  • cookie choice, date and consent identifier;
  • technical signals necessary for abuse prevention.

6. Trackers used

6.1 Strictly necessary trackers (without consent)

These trackers are essential for website security and for retaining your choice. They are not used to track browsing for audience or advertising purposes and cannot be disabled from the banner.

  • dm_consent (Diametral, first-party cookie): remember your cookie choice and its date. Duration: 6 months.
  • _cfuvid (Cloudflare, technical security cookie): distinguish visitors sharing the same IP address in order to limit abusive requests. Duration: session (deleted when the browser closes).
  • Google reCAPTCHA (Google, script and technical calls): protect forms against automated submissions. No cookie is set under diametral.com; Google may use the _GRECAPTCHA cookie on its own domains (6 months).
  • Cloudflare Turnstile (Cloudflare, script and technical calls): protect forms against automated submissions. No cookie set.

6.2 Audience measurement (with consent)

These trackers are set only after acceptance of the “Audience measurement” category. Google Analytics is loaded through Google Tag Manager.

  • _ga (Google Analytics 4, cookie): distinguish visitors to produce traffic statistics. Duration: 13 months maximum.
  • _ga_<identifier> (Google Analytics 4, cookie): retain the session state for the website Analytics property. Duration: 13 months maximum.
  • dm_utm (Diametral, browser local storage): retain the visit source (campaign parameters, landing page, referral website) to identify which content generates contact requests. Duration: 30 days from the first visit after acceptance.
  • dm_last_offre (Diametral, browser session storage): remember the last offer viewed during the visit, to identify which offer led to a contact request. Duration: until the tab is closed.

Audience measurement data are retained in Google Analytics for 14 months.

6.3 Advertising, social networks and personalisation

The website does not use any advertising, social network or personalisation tracker. If such a tool is added, it will be described in this policy and subject to your consent before activation.

7. Consent and withdrawal

Audience measurement trackers are activated only after a positive choice on your part. Rejection is as easy as acceptance and does not prevent access to the website.

Your choice is retained for six months. After that period, you are asked again.

You may change or withdraw your choice at any time through the “Manage my cookies” link. Withdrawal removes the _ga and _ga_<identifier> cookies and the dm_utm and dm_last_offre storage.

Deleting a cookie in the browser does not delete data already transmitted to a provider. Requests relating to personal data may be sent to dpo@diametral.com.

8. Transfers and providers

The website is hosted by Webflow, Inc. (United States). Google and Cloudflare are involved in audience measurement, security and the consent log. These providers may process data outside the European Economic Area, in particular in the United States.

These transfers are covered by the EU-US Data Privacy Framework adequacy decision where the provider is certified, or otherwise by standard contractual clauses. Details are set out in the privacy policy.

9. Browser settings

You may also configure your browser to block or delete cookies:

Blocking strictly necessary trackers may prevent the use of certain forms.

10. Updates and contact

This policy is updated to reflect changes to the website, trackers, providers or applicable law. The last updated date is revised with each substantial change.

For any question about this policy, contact dpo@diametral.com.