How This European Startup's $5M Bet Could Redefine Home Energy

Jan de Vries · 2026-08-24

Let's talk about something that's quietly heating up in the European startup scene. It's not just another funding headline—it's about a fundamental shift in how we power our homes. London-based Boldr just landed $5 million in a pre-Series A round, and honestly, their approach is what makes this interesting. They're not chasing homeowners directly. Instead, they're empowering the HVAC contractors who are already in our basements and attics. Think about it—these are the people who install, fix, and replace the systems that control our indoor climate every single day. ### The Bigger Picture in European Climate Tech Boldr's raise isn't happening in a vacuum. There's a massive wave of investment flowing into European energy management right now. We're talking about a sector that saw at least $166 million in funding just in recent months. Here's a quick look at some of the other players making moves: - Axle Energy (London) raised $25 million to connect heat pumps and EV chargers to electricity markets - GALVANY (Berlin) secured $12 million for their heat-pump platform - metiundo landed $48 million for smart metering in buildings - Capalo AI (Helsinki) got $13 million for virtual power plant operations When you step back, it's clear something significant is building. These companies aren't just selling gadgets—they're reimagining our energy infrastructure from the ground up. ### Why Contractors Hold the Key Boldr's CEO, Madi Ablyazov, put it perfectly: "The next power plant won't be one building. It will be millions of homes working together." But here's the catch—you don't get there through a consumer app alone. You get there through the contractors who already have the trust and access. Boldr's job is to give them the technology to make that future possible. Alexis Horowitz-Burdick from Unconventional Ventures (who led Boldr's round) explained why this matters: "Boldr is attacking one of the most important infrastructure challenges of the next decade: how to add flexible capacity to the grid quickly, affordably and at massive scale." ### More Than Just a Thermostat Founded in 2022, Boldr started with a clear vision. They're building an energy management platform that connects equipment inside homes and buildings, starting with HVAC systems. Their longer-term ambition? Bringing everything—heating and cooling systems, batteries, EV chargers, solar installations—into one connected network. This network could adjust electricity demand when the grid needs it most. That's the kind of flexibility that could prevent blackouts and reduce our reliance on fossil fuel peaker plants. One of their key products is the Universal Thermostat. It's hardware-agnostic, which means it works with existing systems. The wireless architecture eliminates the need for new thermostat wiring, saving contractors up to $500 in labor costs per installation. Every installed unit sends real-time data to Boldr's cloud platform. This gives contractors remote insights they've never had before—predictive maintenance alerts, system performance tracking, and energy usage patterns. ### The Path Forward This $5 million round follows an oversubscribed $3.2 million Seed round in 2025. The new funding will help Boldr expand across North America, develop their contractor software platform further, and move into broader residential and commercial systems. What's really compelling is their network effect strategy. By equipping contractors with better tools, they're creating advocates who will naturally deploy more connected technology. Those installations then feed data back into the platform, making it smarter and more valuable for everyone. It's a classic case of solving the right problem for the right people. While other startups might chase flashy consumer apps, Boldr is building the infrastructure layer that could make distributed energy actually work at scale. So next time you adjust your thermostat, remember—there's a quiet revolution happening behind the walls. And it's being led by the contractors who've been there all along.