What cookies are
A cookie is a small file that a website places in your browser. Some cookies are needed to make the site work. Others are used to measure visits or to recognise which company is visiting the site.
Which cookies and services we use
At present the following six services and cookies load on our website.
Service
Purpose
Who places it
Where the data goes
Functional?
Google Tag Manager (GTM-5P7G33WL)
Loads and manages measurement scripts on every page of the site
Google
United States
Non-functional
Leadinfo (LI-65687247A2F69)
Recognises, from your IP address, which company is visiting our site, on every page
Leadinfo
Netherlands
Non-functional
OpenAI measurement pixel (ChatGPT Ads)
Attributes, only if you arrived through an advertisement in ChatGPT, a later request or completed scan to that advertisement; sets the cookies __oppref and __obref for this
OpenAI
United States
Non-functional
tnx_acq (origin of your visit)
Remembers for ninety days through which source or campaign you arrived, under a random number, so that we can attribute a request to that source; only loads after consent
Twentynext (own server)
Stays on our own server / in your browser
Non-functional
Google reCAPTCHA v3
Assesses, on pages with a form, whether a visitor is human; for this it sends your IP address and behavioural signals to Google, among other things
Google
United States
Necessary*
pll_language (Polylang)
Remembers your language choice (Dutch/English)
Twentynext (own server)
Stays on our own server / in your browser
Functional
* reCAPTCHA protects our forms against automated misuse and is therefore necessary for them to work; we do not ask for consent for it. It does share your IP address and behavioural signals with Google in the United States. If you would rather avoid that, contact us by telephone or email instead of using the form.
Your choice and how to change it
Changing your choice
Google Tag Manager, Leadinfo, the OpenAI measurement pixel and our own origin cookie only load after you have given consent through the banner that appears on your first visit. If you choose essential only, they do not load, nothing about your visit is recorded and the site works as normal. We store your choice for six months in a cookie on your own device (tnx_consent), so it applies per browser and per device. You can change it at any time: open the cookie choice again.
Turning cookies off yourself
You can always manage or delete cookies through your browser settings. Where to find this differs per browser:
Chrome: Settings → Privacy and security → Cookies and other site data
Firefox: Settings → Privacy & Security → Cookies and Site Data
Safari: Preferences → Privacy
Edge: Settings → Cookies and site permissions
If you turn cookies off entirely, certain parts of our website, such as forms, may work less well.
Changes
We may amend this statement, for example when we add or remove a service. Last updated: 4 September 2026.
See also our privacy statement.
