Ostrom
We make energy fair, smart and green - flexible monthly contracts with no hidden fees, digital-first and 100% certified renewable energy.
Ostrom has raised €41M across 5 funding rounds from 28 investors, most recently a Series B round in Jun 2025. Based in Berlin, Germany; active in Energy. Data as of 28 Oct 2026.
Berlin, Germanyostrom.de ↗
Total raised
€41M
€41,200,000
Funding rounds
5
Investors
28
distinct backers
Active since
2021-07
latest 2025-06
Funding by year
EUR raised per yearOstrom — funding by year — interactive chart.
Data table
| Ostrom — funding by year | |
|---|---|
| 2021 | €0 |
| 2022 | €14M |
| 2023 | €7.5M |
| 2025 | €20M |
Signals
High confidenceRaise-next likelihood76
base rate 48% for Series B
- ▲ In typical raise window
- ▲ Up-round momentum
- ▼ Low backer re-investment
Exit likelihood29
base rate 11% (2+ rounds)
- ▲ €30M+ raised
- ▲ 5 rounds raised
- ▲ 5y since founding (typical exit age)
- ▲ Recently backed by strong-exit-track investors
Timing: in window vs cohort gap · momentum up. Funding-only estimates, not predictions and not investment advice — see signals.
Funding rounds
5 rounds| Date | Stage | Amount | Investors | |
|---|---|---|---|---|
| 2025-06-20 | Series B | €20M | Adjacent,Eneco Ventures,Eneco Ventures,J12 Ventures,SE Ventures,Übermorgen Ventures+1 more | View deal → |
| 2023-09-08 | Series A | €7.5M | Adjacent,J12 Ventures,SE Ventures,Übermorgen Ventures,Union Square Ventures | View deal → |
| 2022-12-07 | Series A | €9.3M | 468 Capital,Adjacent,Alexander Ljung,Ante Spittler,Anton Rummel,Diana zur Löwen+17 more | View deal → |
| 2022-01-11 | Pre-Seed | €4.4M | 468 Capital,Angel Investors,Global Founders Capital,J12 Ventures,Jörg Kattner,Übermorgen Ventures | View deal → |
| 2021-07-14 | Other | — | 468 Capital | View deal → |
Investors
28468 CapitalAdjacentAlexander LjungAngel InvestorsAnte SpittlerAnton RummelDiana zur LöwenEneco VenturesEric Quidenus-WahlforssFerdinand MeyerFriedrich NeumanGlobal Founders CapitalHarald BraunsteinJ12 VenturesJörg KattnerJulian WeselekMaximilian BackhausPatrick AndräPhilip KlöcknerPhilipp GlöcklerSE VenturesShio CapitalStephan HaslebacherTobi FezerÜbermorgen VenturesUnion Square VenturesYang Zou
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