Matthias Martensen is the founder of Ostrom. Ostrom has raised $44M, latest Series B $22M (2025). Climate · Berlin, Germany.
Matthias Martensen is the founder of Ostrom. Ostrom operates in Climate and is based in Berlin, Germany. Ostrom has raised $44M, latest Series B $22M (2025). Backers on record include Fred Wilson, Union Square Ventures.
This founder profile draws on disclosed rounds, filings and investor records in the StartupFundraising database and is updated as new funding is recorded. Founders raising now use profiles like this one to study comparable Climate journeys in Berlin — who backed them, at what stage, and how much they raised.
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