This notice covers vierkant.xyz and enquiries to vierkant GmbH. Updated: 19 October 2026.
vierkant GmbH
Represented by managing director Bernd Holger Holarek
Stemmering 34, 45259 Essen, Germany
Phone: +49 201 765 040 85
Email: info@vierkant-design.de
Please use these contact details for privacy enquiries and to exercise your rights.
Our hosting provider is DomainFactory GmbH, c/o WeWork, Neuturmstraße 5, 80331 München, Germany. When you access this website, technical connection and access data are processed, including IP address, access time, requested address or file, data volume, response status and, where transmitted, browser, operating system and referring page. The purposes are delivering the website, ensuring security and investigating faults and attacks. The legal basis is Article 6(1)(f) GDPR: our legitimate interest in operating a secure, reliable website. Our hosting provider receives the technical data. We do not use these logs for advertising profiles.
Technical logs are retained only for as long as needed for secure operation, troubleshooting and investigating concrete security incidents, and are then deleted or anonymised. An incident or the establishment, exercise or defence of legal claims may require longer retention.
We do not use Google Analytics or comparable advertising or visitor analytics tools on this website. Fonts, images and videos are served from our own web hosting. Google Maps is offered only as an external link, not an embedded map. Visiting our contact page does not itself load a Google map.
We do not set analytics or advertising cookies or equivalent tracking storage. Necessary technical processing for transmission and display remains unaffected. Where access to your device is strictly necessary to provide a digital service you request, section 25(2) TDDDG applies; personal data processing additionally requires the GDPR legal basis specified for that purpose.
If you contact us by phone or email, we process the information you provide, such as your name, contact details, message and project or order information, to answer your enquiry, prepare a quotation and, where applicable, perform a contract. Article 6(1)(b) GDPR applies to pre-contractual steps and contracts with you. Article 6(1)(f) GDPR applies to general enquiries and business contacts, based on our legitimate interest in appropriate business communication. Article 6(1)(c) GDPR applies to statutory retention obligations.
Enquiry data are deleted when processing is complete unless further correspondence, statutory retention obligations or legal claims require continued retention. Contractual and accounting documents are retained according to the applicable statutory document category and retention period.
Our business email uses Google Workspace, provided by Google Cloud EMEA Limited, 70 Sir John Rogerson’s Quay, Dublin 2, Ireland; the provider processes email content and communication data. Necessary data may also be disclosed to project and shipping providers, payment providers, tax advisers or legally entitled authorities where required for the relevant purpose. We do not disclose your data for third-party advertising.
Google Workspace may involve processing outside the EU/EEA, particularly by affiliated companies in the United States. The EU-US Data Privacy Framework adequacy decision under Article 45 GDPR may apply to certified US recipients; otherwise appropriate safeguards, in particular EU Standard Contractual Clauses under Article 46 GDPR, are required. You may request information about recipients and safeguards relevant to your data. See the provider’s privacy notice.
Providing enquiry data is voluntary. Without information necessary to answer an enquiry or perform a contract, we may be unable to do so. We do not make decisions based solely on automated processing, including profiling, in these processes.
Opening an external link takes you to another provider. That provider receives the data needed to establish the connection and processes data under its own privacy notice. This includes the Google Maps link, which opens the map with the external provider only when you follow it.
Subject to the legal conditions, you have rights of access (Article 15 GDPR), rectification (Article 16), erasure (Article 17), restriction (Article 18) and data portability (Article 20). Where processing relies on consent, you may withdraw consent at any time with future effect, without affecting prior lawful processing.
Where processing relies on Article 6(1)(f) GDPR, you may object under Article 21 on grounds relating to your particular situation. We then stop processing unless we demonstrate compelling legitimate grounds overriding your interests, rights and freedoms, or processing is needed for legal claims. You may object to processing for direct marketing at any time without providing such grounds.
Under Article 77 GDPR you may complain to a supervisory authority, particularly where you habitually reside or work, or where an alleged infringement occurred. Our competent authority is the Landesbeauftragte für Datenschutz und Informationsfreiheit Nordrhein-Westfalen, Kavalleriestraße 2–4, 40213 Düsseldorf, Germany, www.ldi.nrw.de.
This website uses HTTPS encryption. Please agree a suitable transmission method with us before sending particularly confidential information.