zweikern Data Protection

We, zweikern KG, take the protection of your personal data very seriously and adhere strictly to the rules of data protection law. We only collect personal data on this website where it is technically necessary or where you have given your consent.

This privacy policy explains which personal data we collect and for what purpose we use it. You can access this policy at any time on our website.

Controller

zweikern KG
Staufenstraße 4
83404 Ainring, Germany
Represented by: Andreas Kerneder
Email: hallo@zweikern.com
Phone: +49 (0) 8654 4579727

Subject of data protection

Data protection concerns personal data. According to Art. 4(1) GDPR, this means any information relating to an identified or identifiable natural person. This includes, for example, your name, postal address, email address or phone number, and possibly usage data.

Hosting and server log files

This website is hosted by Hetzner Online GmbH, Industriestr. 25, 91710 Gunzenhausen, Germany, in data centres in the European Union. Whenever you open a page, the server automatically processes data that your browser sends:

• IP address

• date and time of the request

• the page requested

• referrer URL (the previously visited page)

• browser type and version

• operating system

We need this data to deliver the website and keep it secure (Art. 6(1)(f) GDPR). It is not combined with other data sources. Log files are deleted as soon as they are no longer needed for these purposes. We have a data processing agreement with Hetzner (Art. 28 GDPR).

Fonts

The fonts used on this website are stored on our own server. No connection is made to Google or any other font provider when you open a page.

Cookies and consent management

On your first visit we ask which optional services we may use. The services are grouped by purpose: Necessary, Functional, External media, Statistics and Marketing. Optional services are only loaded after you have consented; before that, no data is transmitted to their providers. “Reject all” is just as easy as “Accept all”.

We store your choice in the cookie zweikern_consent together with the time, a random identifier and the version of our service list. If this list changes, we ask you again. You can change or withdraw your consent at any time with effect for the future via the “Cookie settings” link in the footer of every page. When you withdraw consent, we delete the affected cookies on zweikern.com.

Cookies set by this website:

• zweikern_consent: stores your cookie choice. Duration: 12 months. Necessary.

• zweikern_newsletter: remembers that you have already unlocked downloads after signing up for an eBook. Duration: 12 months. Necessary.

• zweikern_page_exit: remembers that the exit notice has already been shown. Duration: 7 days. Only with consent to “Functional”; without consent we only remember this until the page is reloaded.

The legal basis for necessary cookies is Section 25(2) no. 2 TDDDG in conjunction with Art. 6(1)(f) GDPR. For all other services, the legal basis is your consent (Section 25(1) TDDDG, Art. 6(1)(a) GDPR). A complete list of all services and cookies with provider, purpose and duration is available at the end of this page under “Cookies and services at a glance”. You can also delete or block cookies in your browser at any time.

Language version and local storage

We show the language version that matches your browser's language setting. The setting is only evaluated in your browser and is not sent to us. If you choose a language yourself, we remember this choice for the duration of your visit in your browser's session storage (zweikern-lang). The entry is deleted as soon as you close the tab. This information never leaves your device. The legal basis is Section 25(2) no. 2 TDDDG.

Newsletter and eBook downloads

To send you our newsletter or let you download eBooks, we need your email address. We also store the language you selected, the eBook you requested, and the page on which you signed up. Sign-up uses a double opt-in: you receive an email asking you to confirm. We log the time of sign-up and confirmation as well as your IP address so that we can prove the sign-up.

The legal basis is your consent (Art. 6(1)(a) GDPR, Section 7(2) no. 2 UWG). You can withdraw your consent at any time, for example via the unsubscribe link in every newsletter. We store your data until you withdraw consent; we keep the proof of sign-up for up to three years afterwards (Art. 6(1)(f) GDPR).

Newsletters are sent via Mailchimp, a service of The Rocket Science Group LLC, 405 N Angier Ave NE, Atlanta, GA 30308, USA. Mailchimp stores the data on servers in the USA and records whether a newsletter was opened and which links were clicked. We have concluded a data processing agreement with Mailchimp. The company is certified under the EU-U.S. Data Privacy Framework (European Commission adequacy decision of 10 July 2023); standard contractual clauses apply in addition.

YouTube videos

Some articles contain videos from YouTube, a service of Google Ireland Limited, Gordon House, Barrow Street, Dublin 4, Ireland. We use the privacy-enhanced mode (youtube-nocookie.com). A video is only loaded when you click it or have consented to the “External media” category. Only then is data such as your IP address transmitted to YouTube; this may include a transfer to Google LLC in the USA (EU-U.S. Data Privacy Framework). The legal basis is your consent (Art. 6(1)(a) GDPR, Section 25(1) TDDDG).

Podcast player (Podigee)

On podcast pages we embed the player from Podigee, a service of Podigee GmbH, Schönhauser Allee 36, 10435 Berlin, Germany. The player is only loaded when you click “Load podcast” or have consented to the “External media” category. Your IP address is then transmitted to Podigee to deliver the audio file and count downloads. The legal basis is your consent (Art. 6(1)(a) GDPR, Section 25(1) TDDDG). We have concluded a data processing agreement with Podigee.

Statistics and marketing (Google Tag Manager)

With your consent to “Statistics” or “Marketing”, we load Google Tag Manager, a service of Google Ireland Limited, Gordon House, Barrow Street, Dublin 4, Ireland. Tag Manager sets no cookies itself. It loads the services below and passes on your choice (Google Consent Mode), so each service only becomes active in the category you consented to. Without consent, Tag Manager is not loaded.

• Google Analytics (Statistics): we analyse how visitors use our website, for example which pages are viewed and which downloads or meeting requests are triggered. Google Analytics does not store IP addresses; Google Signals is disabled. The data is deleted after 14 months. Cookies: _ga and _ga_* (duration 2 years).

• Google Ads (Marketing): we measure whether a click on one of our ads leads to an enquiry (conversion measurement). Cookie: _gcl_au (duration 90 days).

• LinkedIn Insight Tag (Marketing), a service of LinkedIn Ireland Unlimited Company, Wilton Place, Dublin 2, Ireland: measures the success of our LinkedIn campaigns and enables audiences on LinkedIn. LinkedIn sets cookies on linkedin.com and the cookie li_fat_id on this website.

Google and LinkedIn may transfer data to their parent companies in the USA. Both are certified under the EU-U.S. Data Privacy Framework (European Commission adequacy decision of 10 July 2023). The legal basis is your consent (Section 25(1) TDDDG, Art. 6(1)(a) GDPR), which you can withdraw at any time via “Cookie settings”.

Session recording (Smartlook)

With your consent to “Statistics”, we use Smartlook, a service of Smartlook.com, s.r.o., Brno, Czech Republic. Smartlook records how you move through our pages: clicks, mouse movements, scrolling and pages viewed. This shows us where the website is hard to use. Form input, numbers, email addresses and IP addresses are not recorded. The data is stored on servers in the EU.

Smartlook sets cookies with the prefix SL_C_ and stores data in your browser's local storage. The legal basis is your consent (Section 25(1) TDDDG, Art. 6(1)(a) GDPR). We have concluded a data processing agreement with Smartlook. Recordings are deleted automatically when the contractually agreed retention period ends.

Links to zweikern applications and social networks

For booking appointments we link to sales.zweikern.com, and for logging in to analytics.zweikern.com. These applications have their own privacy notices. Links to LinkedIn, XING, and YouTube are plain links; no data is transmitted until you click them.

Disclosure of data

In principle, we do not pass your data on to third parties without informing you in advance and asking for your permission. Only in the exceptional cases explained below may we transfer your data to third parties without separate prior notice:

If it serves to clarify unlawful use or is necessary for legal prosecution, personal data will be forwarded to law enforcement authorities and, where applicable, to injured third parties. This only happens if there are concrete indications of unlawful or abusive behaviour. We are also legally obliged to provide information to certain public bodies upon request. These are law enforcement authorities, authorities that prosecute administrative offences subject to fines, and the tax authorities.

We use the service providers named above to operate this website. They may only use the data for the purposes we specify and are contractually obliged to handle it in accordance with this privacy policy and applicable data protection law.

Your rights

You have the right of access (Art. 15 GDPR), rectification (Art. 16), erasure (Art. 17), restriction of processing (Art. 18), data portability (Art. 20), and to withdraw consent with effect for the future (Art. 7(3)). Where we process data based on legitimate interests, you may object on grounds relating to your particular situation (Art. 21). Please contact hallo@zweikern.com.

You also have the right to lodge a complaint with a data protection supervisory authority (Art. 77 GDPR). The authority responsible for us is the Bavarian State Office for Data Protection Supervision (BayLDA), Promenade 18, 91522 Ansbach, Germany.

Last updated: November 2026