Top 6 Smart (Energy-Efficient) City startups in USA

Dec 26, 2025
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1
Lime
Funding: $1.5B
Lime helps people move around their cities in an affordable and convenient way while eliminating their carbon footprint.
2
NineDot Energy
Funding: $654.2M
NineDot Energy creates innovative energy solutions that make the urban grid cleaner, more resilient and less costly. It wants to turn underused properties into community battery-farm projects.NineDot Energy is building and operating community-scale battery energy storage systems (BESS) in the New York City metropolitan area. With sites in the Bronx, Brooklyn, Queens, and Staten Island, as well as Westchester County and Long Island, NineDot Energy is helping make our local grid cleaner, more resilient, equitable and affordable. The company plans to develop and build more than 400 megawatts (MW) of clean energy systems by the end of 2026, strengthening local grid infrastructure and providing clean, reliable, and resilient power to tens of thousands of New York City homes and businesses, supporting New York State's mission to achieve 100% clean energy by 2040.
3
Passport
Funding: $213.5M
With Passport, cities can easily analyze scooter usage, parking patterns and curb utilization. Passport also enables cities to implement real-time curbside pricing and payments and better manage scooter placement.
4
Populus
Funding: $19.9M
Populus is a platform for cities to manage the future of mobility.
5
InPipe Energy
Funding: $6.5M
InPipe Energy enable water agencies to manage pressure while producing renewable energy-turning excess pressure into a revenue stream.
6
Pick My Solar
Funding: $3M
Online bidding platform for residential solar buyers. Compare quotes from dozens of top solar companies.
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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