Investor Profile: Vireo Ventures — Thesis, Cheque Size & How to Apply

Vireo Ventures is a Berlin-based early-stage venture capital firm backing the companies rebuilding Europe's energy system. Its bet is simple and sweeping: everything that can be electrified will be, and the winners will be the startups building the technology stack that makes an all-electric economy work. For founders working on energy and mobility, Vireo Ventures funding is one of the most specialist early-stage routes in Europe.

Thesis: electrification plus digitalisation

Vireo invests in European startups driving the energy and mobility transition through electrification and digital innovation. It looks for scalable solutions across energy supply, mobility, transport, buildings and industry, with a particular interest in grid intelligence, heat decarbonisation and electric mobility infrastructure. The firm describes itself as backing early-stage founders who build the future energy system, and it typically aims to be the first institutional investor in a round.

The logic is grounded in the scale of the shift. Vireo's managing partner Felix Krause has argued that reaching net zero on any timeline requires enormous investment in electrification, and that startups bring the speed the transition needs. Unlike generalist funds, Vireo pairs capital with deep sector knowledge, and its limited partners include energy companies that can pilot portfolio technology, giving founders a route to real-world validation that a cheque alone cannot buy.

Fund size and cheque size

Vireo launched its first fund in 2023 and closed Electrification Fund I at €50 million. The fund is backed by the European Investment Fund and energy investors including EnBW New Ventures, VERBUND X Ventures and Encevo. Vireo invests at pre-seed and seed stage, with an initial ticket of €1–2 million, according to its own website, and it reports 37 portfolio companies backed across 10 European countries.

Notable portfolio companies

Vireo's portfolio includes Eco2Grow, which helps industrial small and medium-sized firms adopt renewable energy; Green Fusion, an AI-powered heating management provider; and PIONIX, an open-source electric vehicle charging solution. Other named portfolio companies include Encentive, Atmen and About:Energy, spanning grid optimisation, decarbonised heating and EV infrastructure.

Partners and approach

Vireo was formed by partners who previously worked together at Innogy Ventures and invested as an angel syndicate in 19 companies before formalising the firm. Managing partners Felix Krause and Matthias Engel lead a team that describes itself as built by operators rather than observers, with three partners who have built, funded and scaled European energy technology companies for over a decade. The firm's hands-on model means its energy-company limited partners are collaborators, not passive capital, helping startups run pilots and reach industrial networks early.

How to apply for funding

No public application portal was found on Vireo's website. Founders should approach the firm through its official website at vireo.vc, where the team, thesis and latest portfolio news are published, and make a direct introduction setting out the electrification problem being solved, the stage of the company and the size of round sought. Warm introductions through Vireo's energy-sector network and existing portfolio founders are likely to carry more weight than a cold note, so founders should research which portfolio company is closest to their own market before reaching out.