Privacy notice

Last updated: September 2026. The German version of this notice is the original; this English text is a translation provided for convenience.

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 by which you can be personally identified. Detailed information on data protection can be found in the privacy policy set out below this text.

Data collection on this website

Who is responsible for collecting data on this website? Data processing on this website is carried out by the website operator. You will find their contact details in the section “Information on the controller” in this privacy policy.

How do we collect your data? Your data is collected in part because you provide it to us. This may be data you enter into a contact form, for example. Other data is collected automatically when you visit the website, by our IT systems. This is primarily technical data (for example your browser, operating system or the time of the page request). It is collected automatically as soon as you enter this website.

What do we use your data for? Some of the data is collected in order to ensure that the website is provided without errors.

What rights do you have regarding your data? You have the right at any time to obtain information about the origin, recipients and purpose of your stored personal data free of charge. You also have a right to request the correction or deletion of this data. If you have given consent to data processing, you can withdraw that consent at any time with future effect. You also have the right, in certain circumstances, to request that the processing of your personal data be restricted. You further have a right to lodge a complaint with the competent supervisory authority. You can contact us at any time about this and about any other questions on data protection.

2. Hosting

This website is hosted externally. The personal data collected on this website is stored on the servers of the host. This may primarily be IP addresses, contact enquiries, metadata and communication data, contact details, names, website access data and other data generated through a website.

External hosting takes place for the purpose of fulfilling our contract with our potential and existing customers (Art. 6(1)(b) GDPR) and in the interest of a secure, fast and efficient provision of our online offering by a professional provider (Art. 6(1)(f) GDPR).

Our host will only process your data to the extent necessary to fulfil its performance obligations and will follow our instructions in relation to that data. We use the following host: Netlify, Inc., 512 2nd Street, Suite 200, San Francisco, CA 94107, USA. GDPR audits from Netlify can be provided on request; please use the contact options on this website.

Data processing agreement

We have concluded a data processing agreement with the provider named above. This is a contract required by data protection law which ensures that the provider processes the personal data of our website visitors only in accordance with our instructions and in compliance with the GDPR. The transfer to the USA is based on the EU standard contractual clauses.

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 policy.

When you use this website, various items of personal data are collected. Personal data is data by which you can be personally identified. This privacy policy explains what data we collect and what we use it for. It also explains how and for what purpose this happens.

We point out that data transmission over the internet (for example when communicating by email) can have security gaps. Complete protection of data against access by third parties is not possible.

Information on the controller

The controller for data processing on this website is: Asertion GmbH, Erik-Blumenfeld-Platz 27, 22587 Hamburg, Germany. Represented by Tobias Kietzmann (Managing Director). Telephone: +49 40 401 851 24. Email: mail@asertion.de.

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

Retention period

Unless a more specific retention period is stated within this privacy policy, your personal data remains with us until the purpose for processing it no longer applies. If you assert a justified request for deletion or withdraw consent to data processing, your data will be deleted unless we have other legally permissible grounds for storing your personal data (for example retention periods under tax or commercial law); in the latter case deletion takes place once those grounds no longer 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 where 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, processing also takes place on the basis of Art. 49(1)(a) GDPR. If your data is required for the performance of a contract or for pre-contractual measures, we process your data on the basis of Art. 6(1)(b) GDPR. We further process your data where it is necessary to fulfil a legal obligation, on the basis of Art. 6(1)(c) GDPR. Data processing may also take place on the basis of our legitimate interest under Art. 6(1)(f) GDPR. The legal bases relevant in each individual case are set out in the following paragraphs of this privacy policy.

Withdrawal of your consent to data processing

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

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

Right to lodge a complaint with the competent supervisory authority

In the event of infringements 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 the place of the alleged infringement. This right 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 you or to a third party in a common, machine-readable format. If you request direct transfer of the data to another controller, this will only take place to the extent that it is technically feasible.

Information, deletion and correction

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

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 about this. The right to restriction of processing exists in the following cases:

• If you dispute the accuracy of the personal data we hold about you, we generally need time to verify this. For the duration of that check you have the right to request the restriction of the processing of your personal data.
• If the processing of your personal data happened or is happening unlawfully, 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 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 been determined whose interests prevail, you have the right to request restriction of the processing of your personal data.

If you have restricted the processing of your personal data, that data may - apart from being stored - only be processed with your consent, or to assert, exercise or defend legal claims, or to protect the rights of another natural or legal person, or for reasons of important public interest of the European Union or a member state.

SSL / 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 browser address line changing from “http://” to “https://” and by the padlock symbol in your browser bar. When SSL or TLS encryption is active, the data you enter cannot be read by third parties.

4. Data collection on this website

Cookies

Our web pages use so-called “cookies”. Cookies are small data packets and do no harm to your device. They are stored on your device either temporarily for the duration of a session (session cookies) or permanently (persistent cookies). Session cookies are deleted automatically at the end of your visit. Persistent cookies remain stored on your device until you delete them yourself or your web browser deletes them automatically.

We use exclusively technically necessary cookies, which are required for the operation and the technically error-free provision of our website. We do not use cookies for analysing user behaviour, for audience measurement or for advertising purposes, nor cookies from third-party companies.

Technically necessary cookies are stored on the basis of Art. 6(1)(f) GDPR. The website operator has a legitimate interest in storing technically necessary cookies for the technically error-free and optimised provision of its services. Because we use exclusively technically necessary cookies, no consent is required for this.

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 generally, and activate the automatic deletion of cookies when the browser is closed. If cookies are deactivated, the functionality of this website may be limited.

Server log files

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

• Browser type and browser version
• Operating system used
• Referrer URL
• Host name of the accessing computer
• Time of the server request
• IP address

This data is not merged with other data sources. It is collected on the basis of Art. 6(1)(f) GDPR. The website operator has a legitimate interest in the technically error-free presentation and the optimisation of its website - for this, the server log files have to be collected.

Contact form

If you send us enquiries via the contact form, your details from the enquiry form, including the contact details you provide there, are stored by us for the purpose of processing the enquiry and in case of follow-up questions. Before submitting, you confirm through a mandatory field that you have read this privacy policy and consent to the processing of your details.

The transmission and storage of the form data takes place through our hosting provider Netlify, Inc., 512 2nd Street, Suite 200, San Francisco, CA 94107, USA, which processes the data on our behalf. A data processing agreement is in place with Netlify. The transfer to the USA is based on the EU standard contractual clauses. Netlify’s privacy policy can be viewed at https://www.netlify.com/privacy/.

This data is processed on the basis of Art. 6(1)(b) GDPR where your enquiry is connected with the performance of a contract or is necessary for pre-contractual measures. In all other cases, processing is based on your consent (Art. 6(1)(a) GDPR) and on our legitimate interest in the effective handling of enquiries addressed to us (Art. 6(1)(f) GDPR); consent can be withdrawn at any time.

The data you enter in the contact form remains with us until you ask us to delete it, withdraw your consent to its storage, or the purpose for storing the data no longer applies (for example after your enquiry has been dealt with). Mandatory statutory provisions - in particular retention periods - remain unaffected.

Enquiry by email or telephone

If you contact us by email or telephone, your enquiry including all personal data arising from it (name, enquiry) is stored and processed by us for the purpose of handling your request. We do not pass this data on without your consent.

This data is processed on the basis of Art. 6(1)(b) GDPR where your enquiry is connected with the performance of a contract or is necessary for pre-contractual measures. In all other cases, 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 was requested; consent can be withdrawn at any time.

The data you send us via contact enquiries remains with us until you ask us to delete it, withdraw your consent to its storage, or the purpose for storing the data no longer applies (for example after your request has been dealt with). Mandatory statutory provisions - in particular statutory retention periods - remain unaffected.

Appointment booking with Calendly

On some pages, the “Book online” link takes you to the external website of Calendly LLC, USA. No calendar is embedded on our website. Calendly’s website is only opened when you follow that link.

When you visit the external website, Calendly receives technical data such as your IP address. If you book an appointment, Calendly also processes the details you enter there - such as name, phone number, email address, preferred time and message - and passes them on to us.

Processing the booking details serves pre-contractual measures (Art. 6(1)(b) GDPR). Appointment data remains with us until the purpose no longer applies; mandatory statutory retention periods remain unaffected.

Calendly also processes data in the USA. The transfer is based on the EU-US Data Privacy Framework, under which Calendly is certified, and additionally on the standard contractual clauses of the EU Commission. A data processing agreement is in place with Calendly. Calendly’s privacy policy can be viewed at https://calendly.com/privacy.

Parts of this privacy policy originate from e-recht24.de.