Ostrom Secures €20M to Supercharge Germany’s Shift to Smarter, Greener Energy

Ostrom, a German digital green energy provider, has just raised €20 million in a Series B funding round. The goal? To speed up its expansion across the country by subsidising smart meters for customers and scaling up its cutting-edge NeoGrid Virtual Power Plant.

Eneco Ventures, the investment arm of Dutch clean energy leader Eneco, led the round. Several previous backers also joined in, including SE Ventures, Union Square Ventures, Adjacent, Übermorgen, and J12. This new raise brings Ostrom’s total funding to more than €40 million.

“This Series B funding round represents more than just capital. It’s about strategic partnership. Eneco brings deep industry expertise while Ostrom maintains full independence, strengthening our platform as we accelerate smart meter adoption and scale our virtual power plant. With a clear focus on medium-term profitability, we are driving the transformation of the energy market,” said Matthias Martensen, Co-founder and CEO of Ostrom​.

Launched in 2021, Ostrom offers a fully digital energy service designed around transparency and control. Customers pay a flat monthly fee and receive access to electricity at cost, with two plan options available. SimplyFair offers predictable billing with flexible terms. SimplyDynamic takes it a step further, utilising smart meters and real-time pricing to encourage energy use when it's both cleaner and more cost-effective.

Everything runs through the Ostrom App, which allows users to monitor their consumption, control household energy usage, and connect with devices such as electric vehicles, chargers, solar panels, and battery storage systems. The aim is to give households more independence and smarter ways to manage their energy.

Ostrom’s growth in 2024 was impressive. It tripled its customer base and launched Germany’s largest electric vehicle Virtual Power Plant. The company is positioning itself not just as a utility, but as a tech-driven energy partner that redefines what an energy provider can be.

“We are excited to support Ostrom on their growth journey. Their rapid customer adoption and digital-first approach set a new standard for energy retailers. And Ostrom is a true pioneer in unlocking residential flexibility, delivering real value to consumers, accelerating the adoption of renewable energy, and strengthening grid stability,” added Jan van der Velde, Investment Director at Eneco Ventures.

With the new funding, Ostrom plans to fast-track its rollout across Germany. It will use the money to make smart meters more affordable, enabling more customers to benefit from demand-side flexibility. The team also plans to double down on automation and AI, which already handles over half of customer operations. This lean setup allows the company to scale without ballooning its workforce.

Looking ahead, Ostrom is focused on expanding its NeoGrid platform. By connecting household devices and EV batteries, the platform helps balance the grid, maximise the use of renewables, and drive down energy costs for customers. It’s a bold vision—and with this funding, Ostrom is one step closer to making it a reality.

“Combining Eneco’s energy veterancy with Ostrom’s relentless product and customer focus enables us to use AI as a powerful multiplier for rapidly prototyping and releasing new products, already solving 50% of customer requests through AI, and allowing our small, highly capable teams to stay agile, innovative, and execution-driven,” said Karl Villanueva, Co-Founder & CMO/CPO of Ostrom.