Boldr

Boldr was founded in 2022 in London with a bold thesis: that ordinary homes could become distributed power plants, contributing flexible energy capacity to the grid at the moments it is needed most. The company identified a gap in the market between passive smart thermostats and the kind of active, grid-connected energy management that could help stabilise renewable energy systems. By combining smart hardware for heating, ventilation, and air conditioning with a companion software platform, Boldr set out to make energy-efficient homes a practical, scalable part of the clean energy transition.

The Boldr platform works with existing heating and cooling systems regardless of make, enabling homeowners to control energy use across devices — including EVs, solar panels, and home batteries — through a single app. Its Universal Thermostat product has expanded the company's addressable market into the US HVAC sector, where it is building distribution through contractor networks. The hardware-software combination creates a sticky, recurring relationship with households, while enabling Boldr to aggregate demand-shifting capacity at scale for grid operators.

Boldr has shipped over 6,000 units across Europe and North America and is already profitable. Investors include Ada Ventures, Techstars, Unconventional Ventures, Inclimo Climate Tech Fund, and Viva Holdings. The company raised £1.7 million in 2025 to accelerate its US expansion and extend its platform to additional high-load home devices.