Claus-Stefan Duffner

Graduate computer scientist, online business mentor

Claus-Stefan Duffner
4.99 out of 5
Excellent
32 Reviews
Contact information
Claus-Stefan Duffner is a digital business mentor and founder of ISDD GmbH. He has been helping people and companies to build their scalable digital online business for over 25 years. As a graduate computer scientist, he knows the technical side...

Contact information

Claus-Stefan Duffner
Ulimited Dream Life LLC
530B Harkle Rd STE 100
Santa Fe, New Mexico (NM) 87505
United States of America
Directions

100% Recommended
5 stars 32
4 stars 0
3 stars 0
2 stars 0
1 star 0
Customer service
Excellent (5.00)
Cost/Benefit
Excellent (4.97)

32 Reviews on ProvenExpert.com

4.99 out of 5
Excellent
5.00 out of 5
Excellent
Recommendation
Claus-Stefan Duffner was able to inspire and pick me up with his crystal-clear, caring and knowledgeable manner, even though I am already 80 years old and a woman. And I am infinitely grateful for that. What was your biggest learning? To have taken the step to open myself up to this knowledge and this opportunity.
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Customer review & rating for:
Claus-Stefan Duffner
08/05/2024M.
5.00 out of 5
Excellent
Recommendation
Claus-Stefan explains everything clearly and simply enough that even I, not a technical genius, understood everything. Many thanks for that! Thank you also for the fact that I can watch these videos again and again as valuable and inspiring support! What was your biggest learning? You don't need to be afraid of technology. And secondly, that I can also offer my own products as an affiliate. I am fully motivated to get started! I'm going to request my Digistore24 ID today. :)
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Customer review & rating for:
Claus-Stefan Duffner
08/05/2024T.
5.00 out of 5
Excellent
Recommendation
Hello Claus-Stefan, your training videos were really great and clearly explained for me as a layman. Thank you very much. I've already tried it out and sent two affiliates - I've made a start!
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Customer review & rating for:
Claus-Stefan Duffner
08/05/2024Birgit S.
5.00 out of 5
Excellent
Recommendation
Claus-Stefan is an excellent networker. He knows how to give very well and creates a lot of added value for the people he connects with. He has made some valuable connections for me.
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Customer review & rating for:
Claus-Stefan Duffner
08/05/2024Anonymously
5.00 out of 5
Excellent
Recommendation
I got to know Claus-Stefan as a fine person and a very good networker. As I also like to bring people together, I can only take my hat off to Claus-Stefan's abilities. Anyone who works with him is definitely in good hands. I am already looking forward to our next meeting.
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Customer review & rating for:
Claus-Stefan Duffner
08/05/2024Anonymously
5.00 out of 5
Excellent
Recommendation
Claus-Stefan Duffner is simply the embodied network matrix and all of this is completely natural and impressively authentic. In my eyes, he is the perfect role model and the most empathetic and straightforward coach you can book to immerse yourself in this magical field of infinite possibilities.
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Customer review & rating for:
Claus-Stefan Duffner
08/05/2024Stefanie B.
5.00 out of 5
Excellent
Recommendation
Thank you from the bottom of my heart for this wonderful networking course. It has brought me the long-awaited switch. Until now, everything to do with social media etc. was foreign to me, because I missed the real, deep, live encounter. Now the networking idea has changed everything. New doors have opened for me. This is exactly how I want to live, be and connect from heart to heart in order to bring my topic of WOHNOLOGY® into the world. Now I have finally found a way that feels right and coherent, true and authentic to me. All my cells are happy with me! Thank you Thank you Thank you from the bottom of my heart, Heidrun
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Customer review & rating for:
Claus-Stefan Duffner
08/05/2024Heidrun D.
5.00 out of 5
Excellent
Recommendation
I know Stefan Duffner as an excellent strategist, high energy leader, PC professional and top mentor and business coach. He is a pioneer in new professions and a very good motivator. He is a speaker at many interesting congresses and has healed himself through this. A great role model for other people who are frustrated and resigned in their traditional jobs.
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Customer review & rating for:
Claus-Stefan Duffner
07/05/2024Anonymously
5.00 out of 5
Excellent
Recommendation
Claus-Stefan has a broad knowledge and a lot of experience in the online business sector, which he passes on with enthusiasm and always in a good mood. His support really helped me to get started, to make friends with various technical tools and to find my way around social media. At the beginning I was like a donkey on a mountain and now I feel totally empowered to go further on my own. I can warmly recommend Claus-Stefan to anyone who wants to become visible online. Thank you, thank you, thank you dear Claus-Stefan
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Customer review & rating for:
Claus-Stefan Duffner
04/05/2024Christine K.
5.00 out of 5
Excellent
Recommendation
I like the clear and understandable way in which Claus Stefan presents the topics!
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Customer review & rating for:
Claus-Stefan Duffner
26/04/2024Andreas H.
5.00 out of 5
Excellent
Recommendation
He is very competent and radiates a great zest for life. You can tell that he really enjoys his work.
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Customer review & rating for:
Claus-Stefan Duffner
23/04/2024P.
5.00 out of 5
Excellent
Recommendation
In only about 3 months I had a finished product, an online course. What an intensive time! Many thanks for your support, dear Claus-Stefan! Without you, I would never have dared to try it and, as a beginner, I learned an incredible amount! For me, it was a time of constantly pushing my own boundaries and sometimes I still shake myself to believe it. You were able to pick me up well and thank you very much for the great time!
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Customer review & rating for:
Claus-Stefan Duffner
27/03/2024Beatrix L.
5.00 out of 5
Excellent
Recommendation
Klaus-Stefan and his wonderful wife are both way ahead of their time and are already living a life in the absolute abundance matrix. I am always amazed at how valuable their mentoring sessions are and admire their freedom and openness. They are 2 professionals, each in their own field!
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Customer review & rating for:
Claus-Stefan Duffner
25/03/2024Insha B.
5.00 out of 5
Excellent
Recommendation
The courses are engaging and informative, yet understandable.
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Customer review & rating for:
Claus-Stefan Duffner
20/03/2024M.
5.00 out of 5
Excellent
Recommendation
Claus-Stefan Duffner's conferences, courses and offers are full of valuable content. I always enjoy attending them and take a lot away from the wide range of offers.
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Customer review & rating for:
Claus-Stefan Duffner
19/03/2024Silja R.
5.00 out of 5
Excellent
Recommendation
In the mentoring sessions, I learned how to successfully switch from offline to online business. Within a few months, I was laced into visibility. I learned how to create landing pages and funnels. Claus-Stefan showed me everything to do with technology. Carmen accompanied me when doubts and fears arose. Thanks to her, I learned to focus and sell with love. What a power duo !!!!I have more than achieved my goals!!! I now give online webinars, produce products about meridian tapping, give mentoring sessions.
Fear turned into fun and success:

Thanks to you I am living my dream
Thanks to you, I am living my soul business
Thanks to you, I can see that anything is possible
.....I just have to go for it!!!
Thank you dear ones, you are wonderful!!!
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Customer review & rating for:
Claus-Stefan Duffner
19/03/2024Ewa van den B.
5.00 out of 5
Excellent
Recommendation
From 0 to 1000, you could say. Claus-Stefan led me to a 100% realization of a top congress. His mentoring is almost breathtaking, as he was always there for me. And I also enjoy working at night and in the very early hours of the morning. Claus-Stefan always answered my questions, even at the weekend and even when he was traveling. In addition, every question I asked was handled with the utmost care. So if there is anyone I can recommend as a mentor, it is Claus-Stefan Duffner.
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Customer review & rating for:
Claus-Stefan Duffner
21/01/2024M.
5.00 out of 5
Excellent
Recommendation
Very competent and helpful. He has an enormous amount of knowledge and conveys it in an easily understandable way.
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Customer review & rating for:
Claus-Stefan Duffner
15/01/2024M.
5.00 out of 5
Excellent
Recommendation
I don't have an online business at the moment, but I will contact you later if I need to and take advantage of your offers!
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Customer review & rating for:
Claus-Stefan Duffner
03/01/2024Anonymously
5.00 out of 5
Excellent
Recommendation
Thank you, Claus-Stefan, for mentoring me over the past few months. We discussed the planning and implementation of my first online congress together, which gave me more visibility and reach. We also discussed technical questions, e.g. about the Click Summits congress platform, Vimeo, Canva, Digistore24. There were also some tips on technical devices such as the microphone. In addition, I received further helpful impulses for my still quite new online business. I found the mentoring really enriching and can wholeheartedly recommend it. Dr. Sabrina Bechler
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Customer review & rating for:
Claus-Stefan Duffner
19/12/2023Dr. Sabrina B.
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All reviews and experiences about Claus-Stefan Duffner are the subjective opinions of those who compose and submit them  |  The profile owner is responsible for the contents of this page  |   Profile active since 15/05/2020  |  Last update: 08/05/2024   |  Report profile

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