Ostrom is a digital green energy provider that offers households full transparency and control over their electricity via the Ostrom App, combining monthly-cancellable contracts, effortless switching, and 100% certified green electricity. Its product suite includes SimplyFair and SimplyDynamic, which provide electricity at cost and hourly dynamic pricing. The company emphasizes automation and actionable data, using AI to resolve roughly 50% of customer requests and keep teams small and agile. Ostrom plans to accelerate smart meter adoption and expand its NeoGrid™ Virtual Power Plant to connect household devices and electric vehicle batteries for demand-side flexibility. It will subsidise smart meters for customers, scale its virtual power plant, and expand tech capabilities to maximise renewable usage and reduce customer costs. Financially, Ostrom has raised capital to scale rapidly while focusing on medium-term profitability and grid-stability solutions. Ostrom operates a smart energy management platform that helps consumers control and reduce their energy consumption. Its product suite includes the SimplyFair variable electricity tariff, the dynamic-pricing SimplyDynamic tariff with smart meter support, Smart EV Charging, HVAC optimization, Solar PV integrations, and the Ostrom Store for smart home devices, all controllable via an app. The company is B Corp Certified™ and led by CEO Matthias Martensen and CMO/CPO Karl Villanueva. Ostrom intends to use newly raised funds to further expand its product offerings and solar solutions. The company is based in Berlin, Germany. Recent fundraising increased its total known funding to $23M. Ostrom offers a smartphone app and platform that helps consumers manage energy use and reduce bills by enabling smart energy billing, real-time dynamic price tariffs, EV charging and heat pump optimisation. Its core proposition is an "electricity-at-cost" model that on-boards customers for a flat monthly fee and provides real-time feedback on consumption and sustainability. The company emphasizes smart energy management automations and a user experience it says customers love and trust. Founded in May 2021 in Berlin, Ostrom reports month-on-month growth and claims it is already in the top 10% of German energy suppliers by customer metrics. The startup plans to double headcount by the end of 2024, hiring mainly product and tech specialists to execute its roadmap. To date it has raised almost €14 million in total funding, including the new Series A. Ostrom is a green tech startup founded in 2021 in Berlin that builds an all-digital energy service platform aimed at making switching to green energy accessible and affordable. Its product offers one flexible monthly tariff with no lock-ins, end-to-end multilingual support, responsive live customer chat, carbon tracking in its app, and 100% green energy sourced via direct power purchasing agreements (PPAs). The company plans to scale its energy product portfolio and its "super app" within Germany, across Europe and beyond following the new financing. Ostrom says it was built to be lean and automation-first to achieve the lowest cost-to-serve in the market and to disrupt incumbents that rely on manual processes and physical mail. Since its May 2021 launch it has exceeded a seven-digit ARR run rate after six months, grown on average more than 100% month-over-month with negligible churn, and already serves customers in over 400 cities and towns. It ranks among the top 25% of energy providers in Germany and has switched clients from over 150 energy suppliers.

Total raised

$46M

Funding rounds

4

Latest round

Series B

Latest activity

Jun 2025