George Tziralis is a Partner at Marathon Venture Capital, an Athens-based seed fund that invests €500. See sector focus and contact routes.
George Tziralis is a Partner at Marathon Venture Capital, an Athens-based seed fund that invests €500,000 to €1.5 million (sweet spot ~€1.5M) in early-stage B2B technology startups founded by Greeks aiming to scale globally. His primary sectors include AI, cybersecurity, IT infrastructure, deep tech, fintech, agritech, and defense tech, with a distinctive thesis of backing "Greek founders, anywhere" to attract subsequent international funding. Notable portfolio companies include category-defining exits and leaders such as Hack The Box (cybersecurity), Causaly (AI biomedical research), Augmenta (precision agriculture, exited to CNH for $110M), Netdata (IT monitoring), and LearnWorlds (e-learning).
Every field above is read from the StartupFundraising investor directory — disclosed location, recorded investments and stated focus — and re-checked as filings arrive. Founders pair it with investors in Athens when building a target list.
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