Martin Sinner is the COO of 360dialog and the founder of Idealo. See portfolio, sector focus and contact routes.
Martin Sinner is the COO of 360dialog and the founder of Idealo, one of Europe’s largest online price comparison platforms, with prior experience as a Venture Partner at Berlin Ventures and CEO of redcoon. As an angel investor, he primarily targets early-stage technology companies in Germany, focusing on sectors like SaaS, B2B AI, conversational commerce, and software services. His typical check size averages around $3.04 million, and he often participates as a follow investor rather than a lead, though specific lead/follow behavior is not consistently documented. Notable portfolio companies include persomatch, ResearchGate, Tyles, and Shore, with investments spanning from 2010 to 2024. Sinner has made between 15 and 34 documented investments, reflecting an active but selective approach to angel investing. While he has not published public writing or a distinctive investment thesis, his portfolio and sector focus suggest a strong preference for data-driven, B2B tech ventures rooted in the German market.
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 Berlin when building a target list.
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