I am very happy with Mathias’ support on site and via phone – he is fast and reliable in solving all my IT related issues.
– Ulrike Geuß


I am a customer of Mathias for many years now. With all issues regarding IT, I could rely on him and his fast and professional support, especially regarding aspects of sustainable IT and IT security as well as privacy. I have always felt myslf in good hands and am completely satisfied.
– Kerstin John


I am a foreigner. I am also over fifty years old, meaning, I am of a generation not always familiar with the latest technology. Mathias Renner has continually and patiently helped me in many aspects of home-office technology, including design and construction of an internal network. For more than a decade, I have found Mathias to be always fair; trustworthy; responsive to short-term, unexpected situations; and knowledgeable about all dimensions of IT necessary for a small firm. His command of English is also exceptional.
– Ron Beyma

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