Privacy & data

How we handle your data.

We are an ecommerce data engineering company. Handling data carefully is part of the work. This page explains what we collect when you visit the site or contact us, why we collect it, and what you can ask us to do.

Last updated: 13 June 2026

01 Who is responsible

The data controller.

The controller for personal data collected through this site is Butterstreet 21 BV, Nieuwe Boteringestraat 21, 9712PG Groningen, Netherlands (KVK 59664967). Questions about your data? Email [email protected] or use the contact form.

02 What we collect

Site visits and messages.

If you fill in the contact form, we receive what you send: your email and message, plus optional details such as name, store URL, platform, and store age. If you accept analytics cookies, we load Google Analytics to understand how visitors use the site. We also store a small browser flag for your analytics choice.

03 Legal basis

Why we process it.

We process contact form details because you asked us to respond. We load Google Analytics for visitors who accept analytics cookies, and we use DataBull data intelligence because we have a legitimate interest in understanding how the site performs. You can decline analytics in the cookie choice and limit tracking through your browser settings or privacy extensions.

04 Sharing & transfers

Who else sees it.

We do not sell your data. We share it only with systems that help us run the site and respond to you, currently MessageBull for enquiries, Google Analytics for accepted analytics measurement, and DataBull for data intelligence. Some provider infrastructure may sit outside the European Economic Area.

05 Your rights

What you can ask for.

Under the GDPR you can ask us to access, correct, delete, restrict, or export your personal data. You can also object to certain processing and lodge a complaint with the Autoriteit Persoonsgegevens.

FAQ Privacy FAQ

Privacy questions, answered.

Who controls the personal data collected through this website?

Butterstreet 21 BV is the data controller for personal data collected through this website.

What data does the contact form collect?

The form collects your email and message as required fields, plus optional details such as name, store URL, platform, and store age.

Does Butterstreet use DataBull for data intelligence?

Yes. Butterstreet uses DataBull for data intelligence to understand how visitors use the site and how the site performs.

Which systems process enquiry or data intelligence data?

Butterstreet currently uses MessageBull for enquiries and DataBull for data intelligence.

How can I exercise GDPR rights?

Email [email protected] for English enquiries or [email protected] for Dutch enquiries.