Top Clean Energy Startups in 2027

Low cost, Long duration energy storage systems

Wunder is a Modern Energy Company. We help businesses, municipalities, and schools save money by delivering clean on-site power. We convert simple warehouses into electrified industrial platforms built for the future. We enable the nation’s leading commercial and industrial real estate firms to capture the benefits of solar across their properties. We align ESG goals with revenue targets. We deploy renewable energy assets today that will power America’s tomorrow. We open new markets, we launch new partnerships, and we build new solar and energy storage projects every day. Join us at wundercapital.com/careers

Charm Industrial is a venture-backed startup in San Francisco with a mission to reverse climate change and return the atmosphere to 280ppm CO₂ – otherwise known as pre-industrial atmospheric CO₂ concentration. To accomplish this, we’re working on both carbon removal and emissions reductions. First, we’re working on carbon removal through bio-oil sequestration. Charm uses plants to capture CO₂ from the atmosphere. We convert biomass into a stable, carbon-rich liquid and then pump it deep underground. This removes CO₂ permanently from the atmosphere, out of reach of wildfires, soil erosion and land use change. Second, we’re working on emissions reductions by decarbonizing ironmaking, which makes up more than 7% of global emissions. Come help us fight climate change — gigatons or bust!

Autonomous boats hold the same disruptive potential as autonomous automobiles. We are Canada’s first autonomous boat company, and are focused on creating new technologies to revolutionize this burgeoning industry.

Power markets are undergoing a generational transformation. Surging electricity demand, an evolving generation mix, and growing market complexity are fundamentally changing how energy is produced, traded, and managed. Tierra is building an agentic power trading platform for physical energy assets. Our platform brings together market intelligence, forecasting, optimization, and AI-powered analysis to help energy teams make faster, smarter decisions without sacrificing transparency or control. We believe the future of energy trading lies in combining the speed and scale of artificial intelligence with the judgment and expertise of experienced operators. Founded by energy industry veterans, we're a team of engineers, data scientists, and market practitioners building the technology infrastructure for a new era of energy. Our ambition is to equip energy teams with the capabilities of a world-class trading desk and fundamentally redefine how physical energy assets are managed.

Salient Energy's zinc-ion batteries are half the cost and last twice as long as lithium-ion batteries. They also use an inherently safe water-based chemistry. This makes them perfectly suited for the large and rapidly growing grid storage market.

Light turns power into a platform. We help leading brands—like solar providers, automakers, and home platforms—offer embedded, branded electricity plans to their customers. Our partners are reshaping how people experience energy, unlocking better customer experiences or the full potential of products like batteries, EVs, and other smart devices. We’re bringing together the best builders in tech and energy, backed by top investors and angels. Based in Austin, TX, we’re not just building a better utility—we’re redefining what a power company can be.

Moment Energy is repurposing Electric Vehicle (EV) batteries into clean, safe, and reliable power storage for on and off-grid applications. Their goal is to accelerate the transition to renewable power. By creating a circular economy for EV batteries, Moment extends their lifetime value by using them in second-life applications. As EV batteries still have up to 80% of the capacity left at the end of their life in a vehicle, we prevent toxic battery disposal in landfills and the need to mine lithium for the creation of new batteries.

Solar panel Installations

Xempla is the world’s first decision support system for enterprise asset management, designed to provide any operations and maintenance team with the tools, resources and assistance they need to make better decisions throughout the asset lifecycle. We are building the most reliable and easy-to-use EAM tool on the market, helping O&M teams thrive in an increasingly digital, data-first environment. We have recognised some of the most pressing challenges facing the industry - from a widening skill gap to an ageing workforce and shortage of newcomers into such roles, creating an urgent need to retain and transfer knowledge, coupled with the significant costs of capacity building. And we’ve made sure we’ve covered it all, so asset and facility management companies can focus on delivering positive outcomes for their customers, driving their teams forward, and growing their business.