Ostrom Raises €20 Million Series B to Accelerate Germany’s Smart Energy Revolution.

Led by founders Matthias Martensen(CEO) and Karl Villanueva(CPO), Ostrom has raised €20 Million Series B led by Eneco Ventures, joined by returning investors SE Ventures, Union Square Ventures, Adjacent, Übermorgen, and J12, bringing the total funding to over €40 million.

Founded in 2021, Berlin-based Ostrom offers 100% certified green electricity with transparent, cancel-anytime contracts and a digital-first experience. Its app-powered platform gives households full control over energy use and pricing, while its Virtual Power Plant leads Germany’s shift toward smart, sustainable, and decentralized power.

Ostrom tripled its customer base in 2024 and launched Germany’s largest EV Virtual Power Plant, redefining energy with cost-based and dynamic pricing via its SimplyFair and SimplyDynamic plans. With its Series B funding, Ostrom will scale nationwide by subsidizing smart meters, expanding AI-powered automation, and accelerating the growth of its NeoGrid™ VPP to optimize grid balance and renewable energy use.