NOX Energy Raises €3M Seed to Scale Residential Energy Flexibility Software

NOX Energy Closes €3M Seed Round

NOX Energy, an Antwerp-based energy-technology startup founded in 2024, has raised €3 million in seed funding. The round was led by Rise PropTech, with participation from Seeder Fund, Volve Capital, 100IN, Fair Capital Impact Fund and UNETI Ventures.

What NOX Energy Does

NOX Energy builds the software layer between residential energy devices and electricity markets. Its platform is embedded in the apps of energy retailers and equipment manufacturers, where it optimises heat pumps, solar panels and batteries to help balance the grid.

Beyond device optimisation, the platform forecasts household consumption and shares flexibility revenue with partners and households. That model positions the company at the intersection of two trends: the growing installed base of distributed residential energy assets, and the need for grid operators and markets to draw on that flexibility.

Market Footprint

The company operates in Belgium and the Netherlands. Both markets have seen rapid adoption of residential solar, heat pumps and home batteries, creating a pool of flexible capacity that can be aggregated and dispatched through software.

The Investment Case

NOX Energy's approach is partner-led rather than direct-to-consumer. By embedding into energy retailers' and equipment manufacturers' existing apps, the company can reach households through channels that already own the customer relationship. That reduces customer acquisition friction and aligns incentives: partners and households both share in flexibility revenue.

For acquirers and strategic investors, the appeal lies in the platform's position as infrastructure. The software sits between devices and markets, a layer that becomes more valuable as the number of connected devices grows and as flexibility markets mature across Europe.

Round Details

• Company: NOX Energy
• Headquarters: Antwerp, Belgium
• Founded: 2024
• Round type: Seed
• Amount: €3,000,000
• Lead investor: Rise PropTech
• Additional investors: Seeder Fund, Volve Capital, 100IN, Fair Capital Impact Fund, UNETI Ventures
• Markets served: Belgium and the Netherlands

What to Watch

The seed funding gives NOX Energy capital to deepen its platform and expand its partner network in its two current markets. Key indicators to track include the number of energy retailers and manufacturers embedding the platform, the volume of residential devices under management, and the company's ability to demonstrate recurring flexibility revenue shared across partners and households.

As European electricity markets continue to integrate demand-side flexibility, companies that own the software layer between home devices and market signals occupy a strategically important position. NOX Energy's seed round, led by Rise PropTech with a broad syndicate behind it, provides the runway to prove that model at scale.