Asterion Ventures has backed Companion.energy, a Belgian software company that helps large industrial and commercial enterprises optimise energy procurement and distributed asset management in real time.
The Paris-based impact fund joined a €7.8m seed round led by Realyze Ventures and Pi Labs, with existing investors also participating.
Companion.energy says its platform manages more than 2 TWh of annual energy consumption and production, representing roughly €500m in combined energy spend and revenues. The company claims revenue grew tenfold over the past year, surpassing €1m in annual recurring revenue (ARR).
Antonin Léonard, partner at Asterion Ventures, confirmed to Impact Loop that Companion is the firm's first deal outside France.
The investment came via an Special Purpose Vehicle (SPV) combining an allocation from Asterion's €8m pre-seed fund and a group of angels – not from the new €100m fund the firm is currently raising.
In January, Léonard told Impact Loop that Asterion was actively targeting neighbouring markets including Belgium, the Netherlands, Spain, Switzerland, Italy and Germany, after opening an Amsterdam office.
Founded in 2021, the firm is anchored by more than 900 angels – including founders of Back Market, BlaBlaCar and Too Good To Go – rather than a small group of institutional LPs. Asterion made 11 investments in 2025 from its existing €50m early-stage fund.