Privacy Policy

We at grandcentrix take the protection of your personal data very seriously. We treat your personal data confidentially and in accordance with the legal data protection regulations. When you use this website, various personal data are collected.

Personal data is data that can be used to identify you personally. This privacy policy explains what data we collect and what we use it for. It also explains how and for what purpose this is done. We would like to point out that data transmission on the Internet (e.g., when communicating by e-mail) can have security gaps. Complete protection of data against access by third parties is not possible.

Information on the processing of your data

Responsible party

grandcentrix GmbH
Seat of the company:
Holzmarkt 1
50676 Cologne

Managing directors:
Matthias Krömer and Roland Hänel

Phone: +49 (0)221 677 860 0

Data protection officer

You can reach our data protection officer at the following contact details:

grandcentrix GmbH
Volker Leniger
Holzmarkt 1
50676 Cologne

Phone: +49 (0)221 677 860 70

Collection of data

Your data is collected, for example, when you provide it to us. This can be, for example, data that you transmit by e-mail. Other data is collected automatically by our IT systems when you visit our website. This is mainly technical data (e.g., IP address, internet browser, operating system or time of page view). This data is collected automatically as soon as you enter our website.


If you send us inquiries by e-mail, your details including the contact data you provide there will be stored by us for the purpose of processing the inquiry and in the event of follow-up questions. We do not pass on this data without your consent.

Types of data processed

  • inventory data (e.g., name, address)
  • contact data (e.g., e-mail address, telephone number)
  • content data (e.g., texts, photos, videos)
  • metadata/communication data (e.g., device information, IP addresses)
  • usage data (e.g., website visit, access times)

Categories of data subjects

  • website visitors
  • customers
  • interested parties
  • employees

Purposes of processing

  • contact requests
  • communication
  • appointment arrangement
  • provision of our website offer
  • tracking

Use of data

Part of the data is collected to ensure error-free provision of the website. Other data may be used to analyze your user behavior. Further data, in particular data transmitted by you, is used for communication and for the fulfillment of contracts or for the execution of pre-contractual purposes.

We process personal data based on the following legal grounds:

  • Consent (Art. 6 para. 1 p. 1 lit. a DSGVO)
  • Contract performance and pre-contractual inquiries (Art. 6 para. 1 p. 1 lit. b DSGVO)
  • Legitimate interest (Art. 6 para. 1. lit. f DSGVO)

Security of processing

We take appropriate technical and organizational measures to ensure a level of protection appropriate to the risk in accordance with the legal requirements, taking into account the current state of the art, the implementation costs and the nature, scope, circumstances, and purposes of the processing, as well as the different probabilities of occurrence and the extent of the threat to the rights and freedoms of natural persons.

SSL or TLS encryption

This site uses SSL or TLS encryption for security reasons and to protect the transmission of confidential content, such as requests that you send to us as the site operator. You can recognize an encrypted connection by the fact that the address line of the browser changes from “http://” to “https://” and by the lock symbol in your browser address line. If SSL or TLS encryption is activated, the data you transmit to us cannot be read by third parties.

Shortening of IP addresses

If the processing of complete IP addresses is not necessary, they will be shortened by us or our contractual partners or replaced by placeholders. This procedure enables us to analyze user behavior on our pages without drawing conclusions about a specific person.

Recipients of the data

In the course of processing personal data, data may be transferred to or disclosed to other entities, e.g., partner companies or individuals. Recipients of this data may include, for example, payment institutions in the context of payment transactions, service providers commissioned with IT tasks or providers of services and content that are integrated into a website. In such cases, we observe the legal requirements and, in particular, conclude appropriate contracts or agreements that serve to protect your data with the recipients of your data.

Transfer to third countries

Third countries are countries outside the European Union (EU), or the European Economic Area (EEA).

If data is transferred to a third country or processed on our behalf in a third country, this is done in accordance with the legal requirements. For our part, data is only transferred to service providers or partners with processing in third countries with an acknowledged level of data protection. This includes special guarantees such as standard contractual clauses.

Storage of data

The data you transmit to us will remain with us until you request us to delete it, revoke your consent to store it, or the purpose for storing the data no longer applies (e.g., after we have completed processing your inquiry). Mandatory legal provisions - in particular retention periods - remain unaffected.

Your rights

Regarding your rights, as well as further questions on the subject of data protection, you can contact us at any time at the above address or by e-mail.


You have the right at any time to receive information free of charge about the origin, recipient and purpose of your stored personal data.


You have the right to request the completion or correction of your data, depending on the circumstances.


You have the right to demand the deletion of your data in accordance with legal requirements.


In accordance with legal requirements, you have the right to restrict the processing of your data. In this case, we will not process the data for any purpose other than storage.


Many data processing operations are only possible with your express consent. You can revoke an already given consent at any time. For this purpose, an informal communication by e-mail to us is sufficient. The legality of the data processing carried out until the revocation remains unaffected by the revocation.

Please send your revocation to:

Data portability

You have the right to have data that we process automatically based on your consent or in fulfillment of a contract handed over to you or to a third party in a common, machine-readable format. If you request the direct transfer of the data to another responsible party, this will only be done insofar as it is technically feasible.


In the event of violations of data protection law, you have the right to lodge a complaint with the competent supervisory authority. However, we would like to ask you to contact us first.

The contact details are:
State Commissioner for Data Protection and Freedom of Information of North Rhine-Westphalia
P.O. Box 20 04 44

Objection to advertising e-mails

We hereby object to the use of contact data published within the framework of the imprint obligation to send advertising and information material that has not been expressly requested.

We expressly reserve the right to take legal action in the event of the unsolicited sending of advertising information, such as spam e-mails.


Cookies are text files that contain data from visited websites or domains and are stored by a browser on the user’s computer. A cookie is primarily used to store information about a user during or after his visit within an online offer. Here is an overview of the most important cookies:

Session cookies:
Are automatically deleted after the end of your visit or closing the browser.

Permanent cookies:
Remain stored even after the browser is closed. For example, the login status can be saved. Likewise, the interests of users used for range measurement or marketing purposes can be stored in such a cookie.

First-party cookies:
Are set by ourselves.

Third-party cookies:
Are mainly used by advertisers (so-called third parties) to process user information.

Necessary (also: essential or absolutely necessary) cookies:
Can be, on the one hand, absolutely necessary for the operation of a website (e.g., to store logins or other user input or for security reasons).

You can set your browser so that you are informed about the setting of cookies and only allow cookies in individual cases, exclude the acceptance of cookies for certain cases or in general, as well as activate the automatic deletion of cookies when closing the browser. When disabling cookies, the functionality of the website may be limited.

Cookies that are required to carry out the electronic communication process or to provide certain functions you have requested are stored on the basis of Art. 6 (1) lit. f DSGVO. The website operator has a legitimate interest in storing cookies for the technically error-free and optimized provision of its services.

Insofar as other cookies (e.g., cookies to analyze your surfing behavior) are stored, these will be treated separately in this data protection declaration, and you may be asked to consent to the use of cookies.

At the present time, grandcentrix GmbH does not use cookies.

Info about cookies regarding Calendly


We offer you the possibility to make an appointment with us in an easy and uncomplicated way. For this purpose, we use “Calendly”. Calendly is a service of Calendly LLC, BB&T Tower, 271 17th St. NW, Atlanta, GA 30363.

When using Calendly, personal data such as name, email address and phone number, as well as any other information you enter in an appointment request, is processed. This data is processed by Calendly. The use is voluntary and based solely on your consent pursuant to Art. 6 para. 1 lit. a DSGVO.

While using the online appointment booking, cookies are used by the provider Calendly. If you do not want your data to be processed by Calendly and thereby transmitted to the USA, please choose another way to make an appointment with us.

For the use of Calendly and the related data transfers, this privacy policy as well as the privacy policy of Calendly shall apply. You can find them here:

Data collection by third parties

Data collection through the use of GitHub Pages. This website is hosted on servers operated by GitHub Inc, 88 Colin P Kelly Jr St, San Francisco, CA 94107, USA. Therefore, please also refer to the GitHub Privacy Statement and GitHub Global Privacy Practices.

github privacy statement
global privacy practices

Server log files

The provider of our Internet presence automatically collects and stores information in so-called server log files, which your browser automatically transmits to us. These are:

  • browser type and browser version
  • operating system
  • referrer URL
  • host name of the accessing computer
  • time of the server request
  • IP address

This data is not merged with other data sources. The basis for data processing is Art. 6 (1) lit. b DSGVO, which permits the processing of data for the fulfillment of a contract or pre-contractual measures.

Analysis tools and third-party tools

When visiting our website, your user behavior may be statistically analyzed. This is done primarily with so-called analysis programs. The analysis of your user behavior is usually anonymous; the user behavior cannot be traced back to you. You can object to an analysis or prevent it by not using certain tools. Detailed information on this can be found in the following analysis tool information.


For the purpose of statistical analysis of the use of our web offers, we use the web analysis service Matomo, which allow an analysis of your surfing behavior. This allows us to improve the quality of our web offers and their content. We learn how the web offers are used and can thus constantly optimize our offer.

The information obtained in the course of the statistical analysis of our web offers is not combined with your other data collected in the course of the technical provision of the web offers.

The IP address used for the analysis is shortened, see IP address shortening.

We process your personal data for the statistical analysis of the use of our web offers on the basis of the following legal grounds: Legitimate interest according to Art. 6 para. 1 lit. f DSGVO