Privacy Policy

As of: July 2026

This is a non-binding English translation. Only the German version of this privacy policy is legally binding.

1) Introduction and contact details of the controller

1.1 We are pleased that you are visiting our website and thank you for your interest. Below we inform you about how we handle your personal data when you use our website. Personal data is any data by which you can be personally identified.

1.2 The controller responsible for data processing on this website within the meaning of the General Data Protection Regulation (GDPR) is:

MJ Digital Ventures UG (haftungsbeschränkt)
Irminfriedstr. 20A
82166 Gräfelfing, Germany
info@donauhub.ai

The controller responsible for the processing of personal data is the natural or legal person who alone or jointly with others determines the purposes and means of the processing of personal data.

1.3 If a data protection officer has been appointed, they can be reached as follows:

Maximilian Bockelbrink
Irminfriedstr. 20A
82166 Gräfelfing

2) Data collection when visiting our website

2.1 Server log files

When you use our website purely for informational purposes, i.e. when you do not register or otherwise transmit information to us, we only collect data that your browser transmits to our server or to the hosting provider, so-called server log files.

When you access our website, the following data in particular may be processed:

the website you visited
date and time of access
amount of data sent in bytes
source/reference from which you reached the page
browser used
operating system used
IP address used, where applicable in anonymized form
hostname of the accessing computer

Processing is carried out in accordance with Art. 6 (1) (f) GDPR on the basis of our legitimate interest in improving the stability, security, and functionality of our website. The data is not passed on or otherwise used unless this is necessary to ensure technical operation, to ward off attacks, or due to legal obligations.

We reserve the right to subsequently check the server log files if there are concrete indications of unlawful use.

2.2 SSL / TLS encryption

For security reasons and to protect the transmission of personal data and other confidential content, for example inquiries to the controller, this website uses SSL or TLS encryption.

You can recognize an encrypted connection by the string "https://" and the lock symbol in your browser bar.

3) Hosting

For the hosting of our website and the display of the page content, we use the following provider:

Hetzner Online GmbH
Industriestr. 25
91710 Gunzenhausen
Germany

All data collected on our website is processed on the provider's servers, insofar as this is necessary for providing and operating the website.

When our website is accessed, Hetzner processes in particular technical access data that is necessary for the secure and stable operation of the website. This may include in particular the IP address, date and time of access, pages or files accessed, browser information, operating system, referrer URL, and hostname of the accessing computer.

Processing is carried out in accordance with Art. 6 (1) (f) GDPR on the basis of our legitimate interest in a secure, reliable, and efficient provision of our online offering.

We have concluded a data processing agreement with Hetzner in accordance with Art. 28 GDPR, which ensures the protection of our site visitors' data and prohibits unauthorized disclosure to third parties.

4) Cookies

To make visiting our website attractive and to enable the use of certain functions, we use cookies, i.e. small text files that are stored on your device.

Some of these cookies are automatically deleted again after you close your browser, so-called session cookies. Others remain on your device for a longer period and enable page settings to be saved, so-called persistent cookies. In the latter case, you can find the storage period in the overview of the cookie settings of your web browser.

Insofar as personal data is also processed by individual cookies used by us, processing is carried out in accordance with Art. 6 (1) (b) GDPR for the performance of a contract, in accordance with Art. 6 (1) (a) GDPR in the case of consent given, or in accordance with Art. 6 (1) (f) GDPR to safeguard our legitimate interests in the best possible functionality of the website as well as a user-friendly and effective design of the site visit.

You can set your browser so that you are informed about the setting of cookies and can decide individually whether to accept them, or exclude the acceptance of cookies for certain cases or generally.

Please note that if you do not accept cookies, the functionality of our website may be limited.

5) Contacting us

When you contact us, for example via a contact form or email, personal data is processed exclusively for the purpose of handling and responding to your request and only to the extent necessary for this purpose.

This may include the following data in particular:

name, if provided
email address
phone number, if provided
content of your message
other voluntarily transmitted information

The legal basis for processing this data is our legitimate interest in responding to your request in accordance with Art. 6 (1) (f) GDPR.

If your contact is aimed at concluding a contract or pre-contractual measures, the additional legal basis for processing is Art. 6 (1) (b) GDPR.

Your data will be deleted when the circumstances indicate that the matter concerned has been conclusively clarified and provided that no statutory retention obligations stand in the way.

6) Use of customer data for direct marketing

Subscribing to our email newsletter

If you subscribe to our email newsletter, we will regularly send you information about our offers, news, or other content of MJ Digital Ventures UG.

The only mandatory information for sending the newsletter is your email address. Providing further data is voluntary and may be used to address you personally.

For sending the newsletter, we use the so-called double opt-in procedure, which ensures that you will only receive newsletters once you have expressly confirmed your consent to receive the newsletter by clicking a verification link sent to the email address provided.

By activating the confirmation link, you give us your consent to use your personal data in accordance with Art. 6 (1) (a) GDPR.

In this context, we store the IP address registered by your internet service provider as well as the date and time of registration, in order to be able to trace any possible misuse of your email address at a later point in time.

The data we collect when you subscribe to the newsletter is used strictly for the intended purpose.

You can unsubscribe from the newsletter at any time via the link provided for this purpose in the newsletter or by sending a corresponding message to the controller named at the beginning.

After you have unsubscribed, your email address will be deleted from our newsletter distribution list without delay, unless you have expressly consented to further use of your data or we reserve the right to further data use that is permitted by law and about which we inform you in this declaration.

7) Web analytics services

7.1 Google Analytics 4

This website uses Google Analytics 4, a web analytics service provided by:

Google Ireland Limited
Gordon House, 4 Barrow St
Dublin, D04 E5W5
Ireland

Google Analytics 4 enables an analysis of your use of our website.

By default, when you visit the website, Google Analytics 4 may collect and process information about your usage behavior through so-called pings, cookies, or comparable technologies. This information may also include your IP address, which is, however, regularly truncated by Google in order to reduce direct identifiability.

The information is transmitted to Google servers and processed there. Transfers to Google LLC, based in the USA, are also possible.

Google uses the collected information on our behalf to evaluate your use of the website, to compile reports on website activity for us, and to provide further services associated with website use and internet use.

According to Google, the truncated IP address transmitted by your browser as part of Google Analytics is not merged with other data held by Google.

All of the processing described above, including the possible setting of Google Analytics cookies or comparable technologies, only takes place if you have given us your express consent in accordance with Art. 6 (1) (a) GDPR.

Without your consent, Google Analytics 4 will not be used during your site visit.

You can revoke your consent at any time with effect for the future. To exercise your right of revocation, please deactivate this service via the cookie consent tool provided on the website.

We have concluded a data processing agreement with Google, which ensures the protection of our site visitors' data and prohibits unauthorized disclosure to third parties.

For data transfers to the USA, Google has joined the EU-US Data Privacy Framework, which is intended to ensure compliance with the European level of data protection on the basis of an adequacy decision by the European Commission.

Further legal information on Google Analytics 4 can be found at policies.google.com/privacy and at policies.google.com/technologies/partner-sites.

Demographic characteristics

Google Analytics 4 can use the "demographic characteristics" function and thereby create statistics that can make statements about the age, gender, and interests of site visitors. This is done by analyzing advertising and information from third-party providers.

This allows target groups for marketing activities to be identified. However, the collected data cannot be assigned by us to any specific person.

Google Signals

As an extension to Google Analytics 4, Google Signals may be used on this website to generate cross-device reports.

If you have activated personalized ads and have linked your devices to your Google account, Google may, subject to your consent to the use of Google Analytics in accordance with Art. 6 (1) (a) GDPR, analyze your usage behavior across devices and create data models, including on cross-device conversions.

We do not receive any personal data from Google in this context, only statistics. If you want to stop the cross-device analysis, you can deactivate the "personalized advertising" function in the settings of your Google account. Further information on Google Signals can be found at support.google.com/analytics/answer/7532985.

User IDs

As an extension to Google Analytics 4, the "User IDs" function may be used on this website. If you have consented to the use of Google Analytics 4 in accordance with Art. 6 (1) (a) GDPR, have created an account on this website, and log in with this account on different devices, your activities, including conversions, can be analyzed across devices.

8) Retargeting / remarketing and conversion tracking

8.1 Meta Pixel / Facebook Pixel for creating custom audiences

Within our online offering, we use the Meta Pixel service, formerly Facebook Pixel, from the following provider:

Meta Platforms Ireland Limited
4 Grand Canal Square
Dublin 2
Ireland

If a user clicks on an advertisement we have placed on Facebook or Instagram, the URL of our linked page can be extended with a parameter by means of the Meta Pixel. After the redirect, this URL parameter can be processed by a cookie or comparable technologies in the user's browser.

On the one hand, this enables Meta to determine the visitors of our online offering as a target group for displaying ads, so-called Facebook Ads or Instagram Ads. Accordingly, we use the service to display the ads we place only to users who have also shown an interest in our online offering or who have certain characteristics, for example interests in certain topics that are determined based on the websites visited and that we can transmit to Meta, so-called custom audiences.

On the other hand, the Meta Pixel can be used to track whether users were redirected to our website after clicking on a Meta advertisement and what actions they take there, so-called conversion tracking.

The collected data is generally anonymous or pseudonymized for us and does not allow us to draw any direct conclusions about the identity of users. However, the data is stored and processed by Meta, so that a connection to the respective user profile is possible and Meta can use the data for its own advertising purposes.

You can revoke your consent at any time with effect for the future by deactivating this service in the cookie consent tool provided on the website.

Where necessary, we have concluded a data processing agreement or a joint controllership agreement with Meta. The information generated by Meta is generally transmitted to a Meta server and stored there. In this context, a transfer to servers of Meta Platforms, Inc. in the USA may also occur.

For data transfers to the USA, Meta has joined the EU-US Data Privacy Framework, which is intended to ensure compliance with the European level of data protection on the basis of an adequacy decision by the European Commission.

8.2 Google Ads remarketing

This website uses retargeting technology from the following provider:

Google Ireland Limited
Gordon House, 4 Barrow St
Dublin, D04 E5W5
Ireland

For this purpose, Google may set a cookie in the browser of your device or use comparable technologies which automatically enable interest-based advertising by means of a pseudonymous cookie ID and on the basis of the pages you visit.

Further data processing only takes place if you have agreed with Google that your internet and app browsing history will be linked by Google to your Google account and information from your Google account will be used to personalize ads that you view on the web.

If, in this case, you are logged in to Google while visiting our website, Google uses your data together with Google Analytics data to create and define target group lists for cross-device remarketing. For this purpose, your personal data is temporarily linked by Google with Google Analytics data in order to form target groups.

In the context of using Google Ads remarketing, a transfer of personal data to servers of Google LLC in the USA may also occur.

All of the processing described above, in particular the setting of cookies or the reading of information on the device used, is only carried out if you have given us your express consent to do so in accordance with Art. 6 (1) (a) GDPR. Without this consent, retargeting technology will not be used during your site visit.

You can revoke your consent at any time with effect for the future. To exercise your revocation, please deactivate this service in the cookie consent tool provided on the website.

8.3 Google Ads conversion tracking

This website uses the online advertising program Google Ads and, within the framework of Google Ads, the conversion tracking of:

Google Ireland Limited
Gordon House, 4 Barrow St
Dublin, D04 E5W5
Ireland

We use Google Ads to draw attention to our offers with the help of advertising material on external websites. In relation to the advertising campaign data, we can determine how successful individual advertising measures are. We pursue the aim of showing you advertising that is of interest to you, of making our website more interesting for you, and of achieving a fair calculation of the advertising costs incurred.

The cookie for conversion tracking can be set when a user clicks on an ad placed by Google. These cookies generally lose their validity after 30 days and are not used for personal identification. If the user visits certain pages of this website and the cookie has not yet expired, Google and we can recognize that the user clicked on the ad and was redirected to this page.

Each Google Ads customer receives a different cookie. Cookies can therefore not be tracked across the websites of Google Ads customers. The information collected with the help of the conversion cookie is used to create conversion statistics for Google Ads customers who have opted for conversion tracking.

We learn the total number of users who clicked on our ad and were redirected to a page provided with a conversion tracking tag. However, we do not receive any information with which users can be personally identified. In the context of using Google Ads, a transfer of personal data to servers of Google LLC in the USA may also occur.

Details on the processing triggered by Google Ads conversion tracking and on Google's handling of website data can be found at policies.google.com/technologies/partner-sites.

All of the processing described above, in particular the setting of cookies or the reading of information on the device used, is only carried out if you have given us your express consent to do so in accordance with Art. 6 (1) (a) GDPR. You can revoke your consent at any time with effect for the future by deactivating this service in the cookie consent tool provided on the website.

In addition, you can permanently object to the setting of cookies by Google Ads conversion tracking by downloading and installing the Google browser plug-in available at the following link: google.com/settings/ads/plugin.

Please note that certain functions of this website may not be available or only available to a limited extent if you have deactivated the use of cookies. Google's data protection provisions can be viewed at policies.google.com/privacy.

9) Address autocompletion

Google Maps Places API

In the web application we operate at app.donauhub.ai we use the Google Maps Places API, a service provided by:

Google Ireland Limited
Gordon House, 4 Barrow St
Dublin, D04 E5W5
Ireland

We use the service solely to complete address entries. When you enter an address in the web application – while setting up your account and in your organization's settings – the service suggests matching addresses and fills in the address fields once you have made your selection. No map is displayed at any point.

The service is loaded only on those pages of the web application that contain an address field. On all other pages of the web application, and on this website, the service is not loaded and no address data is transmitted to Google there. As soon as you open a page containing an address field – that is, before you enter anything – your browser retrieves the service's program code directly from Google. In doing so, your IP address, device and browser information, the internet address of the calling web application as the referrer, and the date and time of access are transmitted to Google in particular. For Google Analytics, which we use on this website, see section 7.

As soon as the content of the address field reaches a minimum length – currently three characters – that content is transmitted to Google so that Google can determine matching suggestions. This also applies where the field already contains a stored address and you merely amend it: what is transmitted is the entire field content in each case. A session identifier, by which Google associates the entries belonging to one operation with each other, is also transmitted. If you select a suggestion, the full address details for that entry are additionally retrieved from Google. You are not obliged to accept a suggestion and may fill in the address fields yourself; the content of the field is, however, transmitted while you are entering it. The remaining address fields – such as postal code, city and country – are not transmitted to Google.

The legal basis for the transmission to Google is Art. 6 (1) (f) GDPR on the basis of our legitimate interest in accurate and prompt address capture and in avoiding incorrect master data. To be distinguished from this is our collection and storage of your address; that is based on Art. 6 (1) (b) GDPR insofar as it is necessary to perform a contract or to take pre-contractual steps. Your right to object under section 12.2 to the processing based on Art. 6 (1) (f) GDPR described above remains unaffected.

The storage of information on your terminal equipment involved in loading the service, and the access to information already stored there, take place without consent on the basis of § 25 (2) No. 2 TDDDG (Telekommunikation-Digitale-Dienste-Datenschutz-Gesetz), as in our assessment they are strictly necessary in order to provide the address autocompletion you have expressly requested. Address autocompletion is therefore not offered as a choice in the web application's cookie consent tool.

In the context of using the service, a transfer of personal data to servers of Google LLC in the USA may occur. For data transfers to the USA, Google has joined the EU-US Data Privacy Framework, which is intended to ensure compliance with the European level of data protection on the basis of an adequacy decision by the European Commission.

Further information on data processing by Google can be found at policies.google.com/privacy.

10) Tools and miscellaneous

Cookie consent tool

This website uses a so-called cookie consent tool to obtain effective user consent for cookies requiring consent and cookie-based or comparable applications.

The cookie consent tool is displayed to users when the page is accessed in the form of an interactive user interface on which consent for certain cookies and/or services can be given by selection.

Through the use of the tool, all cookies and services requiring consent are only loaded if the respective user gives the corresponding consent. This ensures that such cookies are only set on the respective user's device or comparable technologies are only used in the case of consent given.

The tool sets technically necessary cookies in order to store your cookie preferences.

If, in individual cases, personal data such as the IP address is processed for the purpose of storing, assigning, or logging cookie settings, this is carried out in accordance with Art. 6 (1) (f) GDPR on the basis of our legitimate interest in legally compliant, user-specific, and user-friendly consent management and thus in a legally compliant design of our website.

A further legal basis for processing is Art. 6 (1) (c) GDPR. As controllers, we are subject to the legal obligation to make the use of technically non-necessary cookies and services dependent on the respective user's consent.

Where necessary, we have concluded a data processing agreement with the provider of the cookie consent tool, which ensures the protection of our site visitors' data and prohibits unauthorized disclosure to third parties.

Further information about the operator and the setting options of the cookie consent tool can be found directly in the corresponding user interface on our website.

11) Use of OpenAI / AI agent

On our website, we use an AI-supported agent to answer user inquiries, provide information, and – depending on use – generate initial recommendations, summaries, or other content. The provider of the underlying AI technology is OpenAI Ireland Ltd., 1st Floor, The Liffey Trust Centre, 117–126 Sheriff Street Upper, Dublin 1, D01 YC43, Ireland ("OpenAI").

When you use the AI agent, the content you enter, your inquiry, and the technical response of the system are transmitted to OpenAI and processed there. This may concern the following data in particular: free-text inputs, information about your request, technical usage data, and other information that you voluntarily enter into the chat. Please do not enter any information that is not necessary for processing your request.

Processing is carried out in order to provide the function of the AI agent and to answer your inquiry. The legal basis is Art. 6 (1) (b) GDPR, insofar as the use is necessary for carrying out pre-contractual measures or for the performance of a contract, as well as Art. 6 (1) (f) GDPR on the basis of our legitimate interest in offering an efficient, user-friendly, and automated communication and information service.

If, in the course of use, you voluntarily enter health-related information or other special categories of personal data, we will only process this insofar as it is necessary for processing your request and you have expressly consented to this. In this case, the legal basis is Art. 9 (2) (a) GDPR in conjunction with Art. 6 (1) (a) GDPR. You can revoke your consent at any time with effect for the future.

OpenAI processes the transmitted data on our behalf. For this purpose, we have concluded a data processing agreement with OpenAI or accepted OpenAI's corresponding data processing terms. OpenAI may use sub-processors. OpenAI provides a current overview of the sub-processors used by OpenAI.

According to OpenAI, data from API / business use is by default not used to improve or train the OpenAI models. OpenAI may store API inputs and outputs for a limited period, in particular to provide the service, for error analysis, security, and abuse detection. Further information on data processing by OpenAI can be found in OpenAI's privacy policy and data protection information.

The AI agent can generate content automatically. The information output may be incomplete, outdated, or incorrect and does not replace professional advice, in particular no medical, legal, tax, or other professional advice. Please verify important information independently or consult a qualified professional.

12) Rights of the data subject

12.1 Applicable data protection law grants you the following data subject rights vis-à-vis the controller with regard to the processing of your personal data. For the respective conditions of exercise, reference is made to the legal basis cited:

right of access in accordance with Art. 15 GDPR
right to rectification in accordance with Art. 16 GDPR
right to erasure in accordance with Art. 17 GDPR
right to restriction of processing in accordance with Art. 18 GDPR
right to notification in accordance with Art. 19 GDPR
right to data portability in accordance with Art. 20 GDPR
right to revoke consent given in accordance with Art. 7 (3) GDPR
right to lodge a complaint in accordance with Art. 77 GDPR

12.2 Right to object

If, in the context of weighing interests, we process your personal data on the basis of our overriding legitimate interest, you have the right at any time, for reasons arising from your particular situation, to object to this processing with effect for the future.

If you exercise your right to object, we will end the processing of the data concerned. However, further processing remains reserved if we can demonstrate compelling legitimate grounds for the processing that override your interests, fundamental rights, and freedoms, or if the processing serves to assert, exercise, or defend legal claims.

If your personal data is processed by us for the purpose of direct marketing, you have the right to object at any time to the processing of personal data concerning you for the purpose of such advertising. You can exercise the objection as described above. If you exercise your right to object, we will end the processing of the data concerned for direct marketing purposes.

13) Duration of storage of personal data

The duration of the storage of personal data is measured on the basis of the respective legal basis, the purpose of processing and, where applicable, additionally on the basis of the respective statutory retention period, for example retention periods under commercial and tax law.

When personal data is processed on the basis of express consent in accordance with Art. 6 (1) (a) GDPR, the data concerned is stored until you revoke your consent.

If statutory retention periods exist for data processed in the context of legal or quasi-legal obligations on the basis of Art. 6 (1) (b) GDPR, this data is routinely deleted after expiry of the retention periods, provided it is no longer required for the performance or initiation of the contract and no legitimate interest of ours in further storage continues to exist.

When personal data is processed on the basis of Art. 6 (1) (f) GDPR, this data is stored until you exercise your right to object in accordance with Art. 21 (1) GDPR, unless we can demonstrate compelling legitimate grounds for the processing that override your interests, rights, and freedoms, or the processing serves to assert, exercise, or defend legal claims.

When personal data is processed for the purpose of direct marketing on the basis of Art. 6 (1) (f) GDPR, this data is stored until you exercise your right to object in accordance with Art. 21 (2) GDPR.

Unless otherwise stated in the other information in this declaration about specific processing situations, stored personal data is otherwise deleted when it is no longer necessary for the purposes for which it was collected or otherwise processed.