Privacy notice

Note on language: This is a translation of the German original. In case of any discrepancy, the German version at nusselt.de/datenschutz is legally binding.

1. Data protection at a glance

General information

The following notes provide a simple overview of what happens to your personal data when you visit this website. Personal data is any data that can be used to personally identify you. Detailed information on the subject of data protection can be found in our privacy notice below.

Data collection on this website

Who is responsible for data collection on this website?

Data processing on this website is carried out by the website operator. You can find the operator's contact details in the section "Information on the controller" in this privacy notice.

How do we collect your data?

Some of your data is collected when you provide it to us. This may include, for instance, data you enter into a contact form.

Other data is collected automatically or with your consent when you visit the website, by our IT systems. This is primarily technical data (e.g. internet browser, operating system, or time of page access). This data is collected automatically as soon as you enter this website.

What do we use your data for?

Some of the data is collected to ensure error-free provision of the website. Other data may be used to analyze your user behavior. If contracts can be concluded or initiated via the website, the transmitted data is also processed for contract offers, orders, or other engagement enquiries.

What rights do you have regarding your data?

You have the right to receive information about the origin, recipients, and purpose of your stored personal data free of charge at any time. You also have a right to request the correction or deletion of this data. If you have given consent for data processing, you can withdraw this consent at any time for the future. Furthermore, you have the right, under certain circumstances, to request the restriction of the processing of your personal data. You also have the right to lodge a complaint with the competent supervisory authority.

You can contact us at any time regarding this and other questions on data protection.

Analysis tools and third-party tools

When you visit this website, your browsing behavior may be statistically analyzed. This is mainly done with so-called analysis programs.

Detailed information on these analysis programs can be found in the privacy notice below.

2. Hosting

We host the contents of our website with the following provider:

Hetzner

The provider is Hetzner Online GmbH, Industriestr. 25, 91710 Gunzenhausen, Germany (hereinafter "Hetzner").

For details, please refer to Hetzner's privacy notice: https://www.hetzner.com/legal/privacy-policy/.

The use of Hetzner is based on Art. 6(1)(f) GDPR. We have a legitimate interest in the most reliable presentation of our website. Where appropriate consent has been requested, processing is carried out exclusively on the basis of Art. 6(1)(a) GDPR and § 25(1) TDDDG, insofar as the consent covers the storage of cookies or access to information on the user's terminal device (e.g. device fingerprinting) within the meaning of the TDDDG. Consent can be withdrawn at any time.

3. General information and mandatory disclosures

Data protection

The operators of these pages take the protection of your personal data very seriously. We treat your personal data confidentially and in accordance with statutory data protection regulations and this privacy notice.

When you use this website, various personal data is collected. Personal data is data with which you can be personally identified. This privacy notice explains what data we collect and what we use it for. It also explains how and for what purpose that is done.

We point out that data transmission over the internet (e.g. via email) may have security gaps. Complete protection of data from access by third parties is not possible.

Information on the controller

The controller responsible for data processing on this website is:

Nusselt Management GmbH
Drachenseestr. 4a
81373 Munich, Germany

Managing Director: Alexander Nusselt
Commercial Register: HRB 269211, Local Court of Munich
VAT ID: DE348341433

Phone: +49 (0)89 215 543 20
Email: webmaster@nusselt.de

The controller is the natural or legal person who alone or jointly with others decides on the purposes and means of processing personal data (e.g. names, email addresses, or similar).

Storage period

Unless a more specific storage period has been mentioned within this privacy notice, your personal data remains with us until the purpose for data processing no longer applies. If you assert a legitimate request for deletion or withdraw consent to data processing, your data will be deleted, provided we have no other legally permissible reasons for storing your personal data (e.g. retention periods under tax or commercial law); in the latter case, deletion takes place after these reasons cease to apply.

General information on the legal bases for data processing on this website

If you have consented to data processing, we process your personal data on the basis of Art. 6(1)(a) GDPR or Art. 9(2)(a) GDPR, insofar as special categories of data under Art. 9(1) GDPR are processed. In the case of explicit consent to the transfer of personal data to third countries, data processing is also based on Art. 49(1)(a) GDPR. If you have consented to the storage of cookies or to access to information on your terminal device (e.g. via device fingerprinting), data processing is additionally based on § 25(1) TDDDG. Consent can be withdrawn at any time. If your data is necessary for the performance of a contract or for the implementation of pre-contractual measures, we process your data on the basis of Art. 6(1)(b) GDPR. We also process your data insofar as this is necessary for the fulfilment of a legal obligation, on the basis of Art. 6(1)(c) GDPR. Data processing may also be carried out on the basis of our legitimate interest under Art. 6(1)(f) GDPR. The respective relevant legal bases in each individual case are described in the following paragraphs of this privacy notice.

Information on data transfer to third countries that are not secure under data protection law, and to US companies that are not DPF-certified

We use, among other things, tools from companies based in third countries that are not secure under data protection law, as well as US tools whose providers are not certified under the EU-US Data Privacy Framework (DPF). When these tools are active, your personal data may be transferred to and processed in these countries. We point out that in third countries that are not secure under data protection law, a level of data protection comparable to the EU cannot be guaranteed.

We note that the USA, as a safe third country, generally has a level of data protection comparable to the EU. A data transfer to the USA is permitted if the recipient has a certification under the "EU-US Data Privacy Framework" (DPF) or has suitable additional safeguards. Information on transfers to third countries, including the data recipients, can be found in this privacy notice.

Recipients of personal data

In the course of our business activities, we cooperate with various external parties. In some cases, transmission of personal data to these external parties is also necessary. We pass personal data to external parties only if this is necessary for the performance of a contract, if we are legally obliged to do so (e.g. transfer of data to tax authorities), if we have a legitimate interest under Art. 6(1)(f) GDPR in the transfer, or if another legal basis permits the transfer. When using processors, we pass personal data of our customers only on the basis of a valid data processing agreement. In the case of joint processing, a joint controller agreement is concluded.

Withdrawal of your consent to data processing

Many data processing operations are only possible with your explicit consent. You can withdraw any consent you have already given at any time. The lawfulness of data processing carried out up to the withdrawal remains unaffected by the withdrawal.

Right to object to data collection in particular cases and to direct marketing (Art. 21 GDPR)

IF DATA PROCESSING IS BASED ON ART. 6(1)(E) OR (F) GDPR, YOU HAVE THE RIGHT AT ANY TIME TO OBJECT TO THE PROCESSING OF YOUR PERSONAL DATA ON GROUNDS RELATING TO YOUR PARTICULAR SITUATION; THIS ALSO APPLIES TO PROFILING BASED ON THESE PROVISIONS. THE RESPECTIVE LEGAL BASIS ON WHICH PROCESSING IS BASED CAN BE FOUND IN THIS PRIVACY NOTICE. IF YOU OBJECT, WE WILL NO LONGER PROCESS YOUR AFFECTED PERSONAL DATA UNLESS WE CAN DEMONSTRATE COMPELLING LEGITIMATE GROUNDS FOR THE PROCESSING WHICH OVERRIDE YOUR INTERESTS, RIGHTS AND FREEDOMS, OR THE PROCESSING SERVES THE ESTABLISHMENT, EXERCISE OR DEFENCE OF LEGAL CLAIMS (OBJECTION UNDER ART. 21(1) GDPR).

IF YOUR PERSONAL DATA IS PROCESSED FOR DIRECT MARKETING, YOU HAVE THE RIGHT TO OBJECT AT ANY TIME TO THE PROCESSING OF PERSONAL DATA CONCERNING YOU FOR THE PURPOSE OF SUCH MARKETING; THIS ALSO APPLIES TO PROFILING TO THE EXTENT IT IS RELATED TO SUCH DIRECT MARKETING. IF YOU OBJECT, YOUR PERSONAL DATA WILL NO LONGER BE USED FOR THE PURPOSES OF DIRECT MARKETING (OBJECTION UNDER ART. 21(2) GDPR).

Right to lodge a complaint with the competent supervisory authority

In the event of breaches of the GDPR, data subjects have the right to lodge a complaint with a supervisory authority, in particular in the Member State of their habitual residence, place of work, or place of the alleged breach. This right to lodge a complaint exists without prejudice to other administrative or judicial remedies.

Right to data portability

You have the right to have data that we process automatically on the basis of your consent or in performance of a contract handed over to yourself or to a third party in a common, machine-readable format. If you request direct transfer of the data to another controller, this is only carried out if it is technically feasible.

Information, correction, and deletion

Within the scope of applicable statutory provisions, you have the right at any time to free information about your stored personal data, its origin and recipients, and the purpose of data processing, and, where applicable, a right to correction or deletion of this data. For this and other questions on personal data, you can contact us at any time.

Right to restriction of processing

You have the right to request the restriction of the processing of your personal data. You can contact us at any time for this purpose. The right to restriction of processing exists in the following cases:

If you dispute the accuracy of your personal data stored with us, we usually need time to verify this. For the duration of the verification, you have the right to request the restriction of the processing of your personal data.
If the processing of your personal data was/is unlawful, you can request the restriction of data processing instead of deletion.
If we no longer need your personal data, but you need it to exercise, defend, or assert legal claims, you have the right to request the restriction of the processing of your personal data instead of deletion.
If you have lodged an objection under Art. 21(1) GDPR, a balance must be struck between your interests and ours. As long as it has not yet been determined whose interests prevail, you have the right to request the restriction of the processing of your personal data.

If you have restricted the processing of your personal data, this data — apart from its storage — may only be processed with your consent, or for the establishment, exercise, or defence of legal claims, or for the protection of the rights of another natural or legal person, or for reasons of important public interest of the European Union or of a Member State.

SSL or TLS encryption

For security reasons and to protect the transmission of confidential content, such as enquiries you send to us as the site operator, this site uses SSL or TLS encryption. You can recognise an encrypted connection by the fact that the address bar of the browser changes from "http://" to "https://" and by the lock symbol in your browser bar.

When SSL or TLS encryption is enabled, the data you transmit to us cannot be read by third parties.

4. Data collection on this website

Cookies

Our website uses so-called "cookies". Cookies are small data packets and do not cause any damage to your terminal device. They are stored on your terminal device either temporarily for the duration of a session (session cookies) or permanently (permanent cookies). Session cookies are automatically deleted after the end of your visit. Permanent cookies remain stored on your terminal device until you delete them yourself or until they are automatically deleted by your web browser.

Cookies may originate from us (first-party cookies) or from third-party companies (so-called third-party cookies). Third-party cookies enable the integration of certain services of third-party companies within websites (e.g. cookies for handling payment services).

Cookies have various functions. Many cookies are technically necessary because certain website functions would not work without them (e.g. shopping cart function or the display of videos). Other cookies may be used to evaluate user behavior or for advertising purposes.

Cookies that are required to carry out the electronic communication process, to provide certain functions you have requested (e.g. for the shopping cart function), or to optimise the website (e.g. cookies for measuring the web audience) (necessary cookies) are stored on the basis of Art. 6(1)(f) GDPR, unless another legal basis is specified. The website operator has a legitimate interest in storing necessary cookies for the technically error-free and optimised provision of its services. If consent to the storage of cookies and comparable recognition technologies has been requested, processing is carried out exclusively on the basis of this consent (Art. 6(1)(a) GDPR and § 25(1) TDDDG); consent can be withdrawn at any time.

You can set your browser so that you are informed about the setting of cookies and allow cookies only in individual cases, exclude the acceptance of cookies for certain cases or generally, and activate the automatic deletion of cookies when the browser is closed. When deactivating cookies, the functionality of this website may be limited.

If other cookies and services are used on this website, you can find these in this privacy notice.

CCM19

Our website uses CCM19 to obtain your consent for the storage of certain cookies on your terminal device or for the use of certain technologies, and to document this in compliance with data protection law. The provider of this technology is Papoo Software & Media GmbH, Auguststr. 4, 53229 Bonn, Germany (hereinafter "CCM19").

When you enter our website, a connection is made to the CCM19 servers to obtain your consents and other declarations on cookie use. CCM19 then stores a cookie in your browser to be able to assign the granted consents or their withdrawal. The data collected in this way is stored until you request us to delete it, you delete the CCM19 cookie yourself, or the purpose for data storage no longer applies. Mandatory statutory retention obligations remain unaffected.

The use of CCM19 serves to obtain the legally required consents for the use of cookies. The legal basis for this is Art. 6(1)(c) GDPR.

Processor agreement

We have concluded a data processing agreement (DPA) for the use of the above-mentioned service. This is a contract required under data protection law that ensures that the processor processes the personal data of our website visitors only according to our instructions and in compliance with the GDPR.

Contact form

If you send us enquiries via the contact form, the information you provide on the enquiry form, including the contact details you give there, will be stored with us for the purpose of processing the enquiry and in the event of follow-up questions. We do not pass on this data without your consent.

The processing of this data is based on Art. 6(1)(b) GDPR if your enquiry is related to the performance of a contract or is necessary for the implementation of pre-contractual measures. In all other cases, the processing is based on our legitimate interest in the effective handling of enquiries addressed to us (Art. 6(1)(f) GDPR) or on your consent (Art. 6(1)(a) GDPR) where this has been requested; consent can be withdrawn at any time.

To protect against automated spam enquiries, we use technical measures without third-party providers: a hidden honeypot field, a time-based plausibility check, and an IP-based rate limit. No personal data is transmitted to third parties.

The data you enter in the contact form remains with us until you request us to delete it, withdraw your consent to storage, or the purpose for data storage no longer applies (e.g. after your enquiry has been processed). Mandatory statutory provisions — in particular retention periods — remain unaffected.

Enquiry by email, telephone, or fax

If you contact us by email, telephone, or fax, your enquiry, including all personal data resulting therefrom (name, enquiry), will be stored and processed by us for the purpose of handling your matter. We do not pass on this data without your consent.

The data you send us via contact enquiries remains with us until you request us to delete it, withdraw your consent to storage, or the purpose for data storage no longer applies (e.g. after your matter has been handled). Mandatory statutory provisions — in particular statutory retention periods — remain unaffected.

Communication via WhatsApp

For communication with our customers and other third parties, we use, among other things, the instant messaging service WhatsApp. The provider is WhatsApp Ireland Limited, Merrion Road, Dublin 4, D04 X2K5, Ireland.

Communication is end-to-end encrypted (peer-to-peer), preventing WhatsApp or other third parties from gaining access to the communication content. However, WhatsApp does have access to metadata generated in the course of the communication process (e.g. sender, recipient, and time). We also point out that, according to WhatsApp's own statement, it shares personal data of its users with its US-based parent company Meta. Further details on data processing can be found in WhatsApp's privacy policy at: https://www.whatsapp.com/legal/#privacy-policy.

The use of WhatsApp is based on our legitimate interest in the fastest and most effective possible communication with customers, prospects, and other business and contractual partners (Art. 6(1)(f) GDPR). Where appropriate consent has been requested, data processing is carried out exclusively on the basis of consent; this can be withdrawn at any time with effect for the future.

The communication content exchanged between you and us via WhatsApp remains with us until you request us to delete it, withdraw your consent to storage, or the purpose for data storage no longer applies (e.g. after your enquiry has been processed). Mandatory statutory provisions — in particular retention periods — remain unaffected.

The company is certified under the "EU-US Data Privacy Framework" (DPF). The DPF is an agreement between the European Union and the USA intended to ensure compliance with European data protection standards in data processing in the USA. Every company certified under the DPF undertakes to comply with these data protection standards. You can obtain further information from the provider at the following link: https://www.dataprivacyframework.gov/participant/7735.

We use WhatsApp in the "WhatsApp Business" variant.

Data transfer to the USA is based on the EU Commission's standard contractual clauses. Details can be found here: https://www.whatsapp.com/legal/business-data-transfer-addendum.

We have set up our WhatsApp accounts in such a way that there is no automatic data synchronisation with the address book on the smartphones in use.

We have concluded a data processing agreement (DPA) with the above-mentioned provider.

Calendly

On our website, you have the option to arrange appointments with us. For appointment booking we use the "Calendly" tool. The provider is Calendly LLC, 271 17th St NW, 10th Floor, Atlanta, Georgia 30363, USA (hereinafter "Calendly").

For the purpose of booking an appointment, you enter the requested data and your preferred appointment time into the relevant form. The data entered is used for the planning, execution, and, where applicable, follow-up of the appointment. The appointment data is stored for us on Calendly's servers; you can view their privacy policy here: https://calendly.com/privacy.

The data you enter remains with us until you request us to delete it, withdraw your consent to storage, or the purpose for data storage no longer applies. Mandatory statutory provisions — in particular retention periods — remain unaffected.

The legal basis for data processing is Art. 6(1)(f) GDPR. The website operator has a legitimate interest in the most uncomplicated possible appointment booking with prospects and customers. Where appropriate consent has been requested, processing is carried out exclusively on the basis of Art. 6(1)(a) GDPR and § 25(1) TDDDG, insofar as the consent covers the storage of cookies or access to information on the user's terminal device (e.g. device fingerprinting). Consent can be withdrawn at any time.

Data transfer to the USA is based on the EU Commission's standard contractual clauses. Details can be found here: https://calendly.com/pages/dpa.

Processor agreement

We have concluded a data processing agreement (DPA) for the use of the above-mentioned service.

5. Analysis tools and advertising

Google Analytics

This website uses functions of the web analysis service Google Analytics. The provider is Google Ireland Limited ("Google"), Gordon House, Barrow Street, Dublin 4, Ireland.

Google Analytics enables the website operator to analyse the behavior of website visitors. The website operator receives various usage data, such as page views, time spent, operating systems used, and origin of the user. This data is summarised in a user ID and assigned to the respective terminal device of the website visitor.

Furthermore, with Google Analytics we can, among other things, record your mouse and scroll movements and clicks. Google Analytics also uses various modelling approaches to supplement the recorded data sets and uses machine learning technologies in data analysis.

Google Analytics uses technologies that enable the recognition of the user for the purpose of analysing user behavior (e.g. cookies or device fingerprinting). The information collected by Google about the use of this website is generally transmitted to a Google server in the USA and stored there.

The use of this service is based on your consent in accordance with Art. 6(1)(a) GDPR and § 25(1) TDDDG. Consent can be withdrawn at any time.

Data transfer to the USA is based on the EU Commission's standard contractual clauses. Details can be found here: https://business.safety.google/adscontrollerterms/sccs/.

The company is certified under the "EU-US Data Privacy Framework" (DPF). Further information can be obtained from the provider at the following link: https://www.dataprivacyframework.gov/participant/5780.

IP anonymisation

Google Analytics IP anonymisation is enabled. This means that your IP address is shortened by Google within member states of the European Union or in other contracting states of the Agreement on the European Economic Area before being transmitted to the USA. Only in exceptional cases is the full IP address transmitted to a Google server in the USA and shortened there. On behalf of the operator of this website, Google will use this information to evaluate your use of the website, to compile reports on website activity, and to provide further services related to website use and internet use to the website operator. The IP address transmitted by your browser in the context of Google Analytics is not merged with other Google data.

Browser plug-in

You can prevent the collection and processing of your data by Google by downloading and installing the browser plug-in available at the following link: https://tools.google.com/dlpage/gaoptout?hl=en.

More information on how Google Analytics handles user data can be found in Google's privacy policy: https://support.google.com/analytics/answer/6004245?hl=en.

Processor agreement

We have concluded a data processing agreement with Google and fully implement the strict requirements of the German data protection authorities when using Google Analytics.

6. Plug-ins and tools

YouTube with extended data protection

This website embeds videos from the YouTube website. The operator of the website is Google Ireland Limited ("Google"), Gordon House, Barrow Street, Dublin 4, Ireland.

When you visit one of these websites on which YouTube is embedded, a connection is established with YouTube's servers. The YouTube server is informed which of our pages you have visited. If you are logged into your YouTube account, you allow YouTube to assign your browsing behavior directly to your personal profile. You can prevent this by logging out of your YouTube account.

We use YouTube in extended data protection mode. According to YouTube, videos played in extended data protection mode are not used to personalise browsing on YouTube. Ads played in extended data protection mode are also not personalised. No cookies are set in extended data protection mode. Instead, however, so-called local storage elements are stored in the user's browser, which similar to cookies contain personal data and can be used for recognition. Details on extended data protection mode can be found here: https://support.google.com/youtube/answer/171780.

If applicable, further data processing operations may be triggered after the activation of a YouTube video, over which we have no influence.

The use of YouTube is in the interest of an appealing presentation of our online offerings. This represents a legitimate interest within the meaning of Art. 6(1)(f) GDPR. Where appropriate consent has been requested, processing is carried out exclusively on the basis of Art. 6(1)(a) GDPR and § 25(1) TDDDG, insofar as the consent covers the storage of cookies or access to information on the user's terminal device (e.g. device fingerprinting). Consent can be withdrawn at any time.

Further information on data protection at YouTube can be found in their privacy policy at: https://policies.google.com/privacy?hl=en.

Self-hosted web fonts (Josefin Sans)

This website uses the web font "Josefin Sans" for the uniform display of typefaces. The font files are delivered exclusively from this website's own server — no connection to third-party servers (in particular Google Fonts) takes place. When you load the page, your IP address is not transmitted to third parties.

7. Audio and video conferencing

Data processing

For communication with our customers, we use, among other things, online conferencing tools. The specific tools we use are listed below. When you communicate with us via video or audio conference over the internet, your personal data will be collected and processed by us and by the provider of the respective conferencing tool.

The conferencing tools collect all data you provide/use for the use of the tools (email address and/or your phone number). Furthermore, the conferencing tools process the duration of the conference, the start and end (time) of participation in the conference, the number of participants, and other "context information" related to the communication process (metadata).

The provider of the tool also processes all technical data required to handle the online communication. This includes in particular IP addresses, MAC addresses, device IDs, device type, operating system type and version, client version, camera type, microphone or speaker, and the type of connection.

If content is exchanged, uploaded, or otherwise provided within the tool, this is also stored on the servers of the tool providers. Such content includes in particular cloud recordings, chat/instant messages, voicemails, uploaded photos and videos, files, whiteboards, and other information shared during the use of the service.

Please note that we do not have full control over the data processing operations of the tools used. Our options depend largely on the corporate policy of the respective provider. Further information on data processing by the conferencing tools can be found in the privacy notices of the respective tools used, which we have listed below.

Purpose and legal bases

The conferencing tools are used to communicate with prospective or existing contractual partners or to offer certain services to our customers (Art. 6(1)(b) GDPR). Furthermore, the use of the tools serves the general simplification and acceleration of communication with us or our company (legitimate interest within the meaning of Art. 6(1)(f) GDPR). Where consent has been requested, the use of the relevant tools is based on this consent; consent can be withdrawn at any time with effect for the future.

Storage period

Data collected directly by us via the video and conferencing tools is deleted from our systems as soon as you request us to delete it, withdraw your consent to storage, or the purpose for data storage no longer applies. Stored cookies remain on your terminal device until you delete them. Mandatory statutory retention periods remain unaffected.

We have no influence on the storage period of your data stored by the operators of the conferencing tools for their own purposes. For details, please contact the operators of the conferencing tools directly.

Conferencing tools used

We use the following conferencing tools:

Zoom

We use Zoom. The provider of this service is Zoom Communications Inc., 55 Almaden Boulevard, 6th Floor, San Jose, CA 95113, USA. For details on data processing, please refer to Zoom's privacy notice: https://www.zoom.com/en/trust/privacy/privacy-statement/.

Data transfer to the USA is based on the EU Commission's standard contractual clauses.

Processor agreement

We have concluded a data processing agreement (DPA) for the use of the above-mentioned service.

Microsoft Teams

We use Microsoft Teams. The provider is Microsoft Ireland Operations Limited, One Microsoft Place, South County Business Park, Leopardstown, Dublin 18, Ireland. For details on data processing, please refer to Microsoft Teams' privacy notice: https://privacy.microsoft.com/en-us/privacystatement.

Processor agreement

We have concluded a data processing agreement (DPA) for the use of the above-mentioned service.

Webex

We use Webex. The provider of this service is Webex Communications Deutschland GmbH, Hansaallee 249 c/o Cisco Systems GmbH, 40549 Düsseldorf, Germany.

It cannot be ruled out that data processed with Webex may be transferred to third countries (e.g. the USA). Webex has Binding Corporate Rules (BCR) approved by Dutch, Polish, Spanish, and other relevant European data protection regulators. These are binding internal corporate rules that legitimise internal corporate data transfer to third countries outside the EU and EEA. Details can be found here: https://www.cisco.com/c/en/us/about/trust-center/data-protection-and-privacy-policy.html.

For details on data processing, please refer to Webex's privacy notice: https://www.cisco.com/c/en/us/about/legal/privacy-full.html.

Processor agreement

We have concluded a data processing agreement (DPA) for the use of the above-mentioned service.

Last updated: May 2026