General Info
John Karantzis is the CEO of iSignthis and NSX, with a background in engineering, law, and business. He has experience in payments, online media, AML, defense, and secure communications. While there is no specific data on his investment focus areas or previous investments, he is involved in a profitable, diversified payments technology company. His total annual compensation is AU$385k, with a salary of AU$307k, which is below the normal rate for companies of similar size. John’s partnership and collaboration style is under scrutiny due to a case involving mistrust between iSignthis and ASX regarding information leaks to the media.
Location: Amsterdam, Noord-Holland, The Netherlands
Country: Cyprus
Industries:
Investment Regions: EU
Investment Stages: pre-seed, seed
Website: http://www.iSignthis.eu
angel-individual
EU
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🤖 AI Activity Report
Status: not-found
AI Reasoning: Search results show regulatory actions and court cases involving Nickolas John Karantzis and iSignthis (e.g., ASIC decisions in 2024 and penalties in 2025). These items describe corporate and legal matters, not investments in startups. No verifiable public information was found showing any recent investments or transactions (no startup named as invested by him) within the past several years. Because no investment activity could be identified, the appropriate classification is not-found.
Angel activity thresholds:
Low Activity – Only known angel investments more than 12 months ago.
Active – Known angel investments between the last 12 and 6 months.
Very Active – Known angel investments in the last 6 months.
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