🏆 Deal of the Week · CW 25/2025
Ostrom raised EUR 20 million in a Series B round; the company's valuation was not disclosed. The round drew participation from a seven-strong investor syndicate spanning European and US venture firms. The capital will support Ostrom's expansion of its smart energy platform across Germany and broader European markets.
Ostrom — key deal facts
| Company | Ostrom |
| Founded | 2021 |
| Headquarters | Berlin, Germany |
| Amount raised | EUR 20m |
| Valuation | Valuation Remains Undisclosed |
| Round | Series B |
| Investors | 468 Capital, Adjacent, Eneco Ventures, J12, SE Ventures, Union Square Ventures, Ãœbermorgen Ventures |
| Sectors | Clean Energy |
Who invested in Ostrom?
The Series B was backed by 468 Capital, Adjacent, Eneco Ventures, J12, SE Ventures, Union Square Ventures, and Übermorgen Ventures. The syndicate is notable for combining specialist energy investors — Eneco Ventures and SE Ventures bring utility-sector domain knowledge — alongside generalist tier-one venture firms such as Union Square Ventures, signalling cross-sector conviction in Ostrom's model. The geographic spread of the group, covering both Europe and North America, reflects the platform's ambition beyond the German market.
What does Ostrom do?
Ostrom GmbH is a Berlin-based digital green energy provider founded in January 2021 by Matthias Martensen (CEO) and Karl Villanueva. The company operates an app-first energy management platform offering households 100% TÜV Nord certified green electricity under two core tariffs: SimplyFair, an electricity-at-cost model, and SimplyDynamic, an hourly dynamic pricing tariff. The Ostrom App enables customers to manage their contracts and connect more than 800 integrated smart devices, including EV chargers and heat pumps, positioning the platform as a unified interface between consumers and the flexible energy grid.
Ostrom valuation & multiples
Explore the benchmarks: Series B.
Frequently asked questions
How much did Ostrom raise in its Series B?
Ostrom raised EUR 20 million in its Series B round, announced in June 2025.
What is Ostrom's valuation?
Ostrom's valuation was not disclosed as part of the Series B announcement.
Who invested in Ostrom?
The Series B investors are 468 Capital, Adjacent, Eneco Ventures, J12, SE Ventures, Union Square Ventures, and Übermorgen Ventures.
When was Ostrom founded and where is it based?
Ostrom was founded in January 2021 and is headquartered in Berlin, Germany.
Source: original announcement — read the full report.