Top 86 Smart (Energy-Efficient) Home startups

Updated: Dec 09, 2025
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These startups develop smart thermostats, solar systems, smart HVAC and lighting, residential energy storage systems and other energy-saving home technologies.
1
Quilt
Country: USA | Funding: $62M
Quilt produces ductless, dual-zone home heat pumps controlled by artificial intelligence. Quilt's indoor and outdoor units, Dial and mobile app work together to create intelligent home climate control solution. To compete with established players in the heat pump market, the company has focused on software and design. One example is the over-the-air update it has implemented for existing heat pumps - the new firmware improved unit performance by over 20%. Ductless systems ensure a consistent temperature in every room. Quilt is even more efficient thanks to the Auto-Away feature, which uses smart sensors to save energy when rooms are unoccupied. Installation is simple and quick, like other ductless systems and most modern systems are currently in production. The company is building a network of certified installation partners.
2
Base Power
Country: USA | Funding: $1.2B
Base Power is a modern power firm for the electric era that has built a reliable and affordable residential energy service.
3
1Komma5
Country: Germany | Funding: €652M
1Komma5° is aiming to offer households everything needed for a carbon neutral home, including energy storage, charging infrastructure for electric vehicles and solar.
4
Swell Energy
Country: USA | Funding: $582M
Swell is a residential energy storage developer and aggregator.
5
Hometree
Country: UK | Funding: $468.9M
Hometree operates as an online-led boiler installation company.
6
SolarEdge
Country: Israel | Funding: $454.8M
SolarEdge Technologies, global leader in the DC power optimizer market. SolarEdge developed the DC optimized inverter solution that changed the way power is harvested and managed in photovoltaic (PV) systems. The SolarEdge intelligent inverter solution maximizes power generation while lowering the cost of energy produced by the PV system, for improved RoI.
7
Lunar Energy
Country: USA | Funding: $300M
Lunar Energy was founded to transition homes to 100% clean energy—making our electricity greener, our air cleaner, and our energy more safe, secure and reliable for all.
8
tado
Country: Germany | Funding: $250.1M
Tado° offers smart thermostats and apps that adjusts to the real-time behavior of residents in private homes and small businesses.
9
SPAN
Country: USA | Funding: $230.3M
SPAN develops smart electrical panels that unlock whole-home, room and appliance energy data designed to lower your energy bill.
10
BBOXX
Country: UK | Funding: $215M
BBOXX designs, manufactures, and distributes plug and play solar systems. It also offers pay-as-you-go solar power. BBOXX Power DC product range is closed DC systems in standardised sizes. BBOXX Hub brings the smart capabilities of remote monitoring and control to larger capacity systems and projects. BBOXX Pulse is a comprehensive management platform that enables growth of next generation utility businesses.
11
Aquion Energy
Country: USA | Funding: $182.3M
Aquion Energy is a company that manufactures sodium ion batteries and energy storage systems.
12
Tibber
Country: Sweden | Funding: $181.2M
Tibber provides energy consumer services and learns to buy, save, and control electricity for homes. Stockholm wants to replace the original power company with an app to help you reduce your own electricity bill.
13
Atom Power
Country: USA | Funding: $174.5M
Atom Power built the world’s first and only true solid-state circuit breaker. Using semiconductors to control the current digitally, this breakthrough unlocks a future where power is smartly controlled and exponentially safer.
14
Dandelion Energy
Country: USA | Funding: $174.5M
Dandelion is an Alphabet spinout that develops geothermal heating, air-conditioning and cooling systems
15
Sense
Country: USA | Funding: $174.6M
Sense is offering home owners better insight into their energy usage levels, so they can adjust accordingly. The tech, which relies on AI/ML, works with smart meters from companies like Landis+Gyr and Schneider Electric.
16
Sonnen
Country: Germany | Funding: $169.2M
Sonnen is a German-based pioneer for intelligent lithium based energy storage. The sonnenBatterie is not just a battery, it's an intelligent storage system that automatically adjusts the energy usage in your household. In combination with solar panels the sonnenBatterie will enable you to supply yourself with clean energy – thus making you independent and protecting you from energy price hikes.
17
Mighty Buildings
Country: USA | Funding: $153.8M
Mighty Buildings is a developer of 3D printing technology and automation platform that makes housing more affordable for customers.
18
ecobee
Country: Canada | Funding: $149.4M
Ecobee is a provider of Wi-Fi enabled smart thermostats comes with Amazon's Alexa voice assistant built in for residential and commercial applications.
19
dcbel
Country: Canada | Funding: $145M
dcbel offers AI-driven sustainable technologies which enable people to leverage solar energy to power their cars, homes, and lifestyles.
20
Cloover
Country: Sweden | Funding: $121.4M
Cloover partners with renewable energy professionals to simplify and finance sustainable home upgrades, offering embedded financing options for technologies like solar panels, battery storage, heat pumps, and EV charging systems.
Alexander Gillet
Editor: Alexander Gillet
Alexander Gillet is a senior editor for EnergyStartups. He has a deep background in energy sector and startups. Alexander graduated from Emlyon Business School, a leading French business school specialized in entrepreneurship. He has helped several non-profit organizations dedicated to promoting environmental education and sustainability and has written over 250 articles on energy technology for various websites. In his free time, Alexander enjoys yoga, camping and exploring the Blue Ridge Mountains. You can contact Alexander at alexgillet(at)energystartups(dot)com