Top California Energy Startups (263)
Antora Energy is electrifying heavy industry with zero-carbon heat and power. We make it possible and profitable to fully rely on renewable energy for industrial processes. Antora Energy's thermal energy storage soaks up excess solar and wind electricity and uses it to heat blocks of carbon so they glow like inside a toaster. This thermal energy is then delivered to...
New Leaf Energy is one of the leading developers of renewable energy and energy storage projects in the United States—both distributed generation and utility scale. Headquartered in Lowell, MA, with employees and projects spanning the country, New Leaf Energy was formed in 2022 out of Borrego’s market-leading solar and energy storage development business, which extends back to 1980. At New Leaf...
Deep Isolation offers an innovative solution to secure and dispose of spent nuclear fuel from commercial nuclear reactors. Our horizontal drill hole technology offers both safety and low cost. While the drilling technology is standard, Deep Isolation is the first company proposing to use this method for the safe isolation of spent nuclear fuel under a billion tons of rock...
Hanwha Energy USA Holdings Corporation, previously doing business as 174 Power Global, is headquartered in Houston, Texas and is a leading solar energy company wholly owned by Hanwha Energy Corporation. With deep expertise across the solar and battery energy storage system (BESS) development cycle, Hanwha Energy USA partners with landowners, local communities, financial investors, and other stakeholders to build highly...
Pivotal Systems provides best-in-class smart flow monitoring and process control technology designed for the global semiconductor and high-tech industries. Pivotal’s portfolio includes its patented Gas Flow Controllers (GFC™) and Flow Ratio Controllers (FRC). At Pivotal Systems, we aim to enhance fab productivity and capital efficiency with our innovative solutions.
Celerity Consulting Group is an agile risk optimization and information management consulting firm that empowers public utility organizations by converting complex data into clear, actionable intelligence. They specialize in helping gas and electric utilities mitigate risk, optimize assets, and maximize project results through strategic consulting, precision data analysis, and professional services including information governance and vegetation management.
Focused on sustainability and innovation, esVolta develops, owns, and operates reliable utility-scale energy storage assets across the entire lifecycle - delivering value for utilities, energy users, and investors.
SoftBank Group Chairman Masayoshi Son started SB Energy to deploy renewable energy at the scale required to combat climate change. Today, SB Energy is a leading Climate Infrastructure and Technology Platform headquartered in the San Francisco Bay Area and backed by SoftBank Group Corp and funds managed by the Infrastructure and Power strategy of Ares Management Corporation. SB Energy develops,...
The Lewis Group is a multidisciplinary business-to-business collective of affiliate service companies, including Lewis Environmental, Lewis Property Services, and Lewis Development. They provide comprehensive environmental remediation, emergency response, industrial maintenance, and property management services. The company focuses on delivering superior, one-stop solutions for environmental challenges and facility needs, anchored by a culture of safety, quality, and accountability.
Lilac Solutions develops commercially ready direct lithium extraction technology for brine resources. Its proprietary ion-exchange materials, equipment configurations, and process engineering help lithium producers recover lithium faster, more affordably, and with lower environmental impact than conventional evaporation-based methods. The company designs scalable solutions for diverse brines, supporting expanded lithium supply for global electrification while reducing freshwater use and land disturbance.
UpEnergy builds high-quality decarbonization projects that improve lives. We do this with support from partners who believe in a just energy transition in which low-income people are prioritized by climate finance. Our approach in everything we do centers on applying our expertise across climate finance, monitoring and evaluation, engineering, behavioral science, and local operational insights. This ensures we deliver projects...
Founded in 2019, Terabase Energy is a solar technology company whose mission is to reduce the cost and increase the scalability of solar by building an interconnected digital and automation platform for the development, construction, and operations of utility-scale PV power plants.
The BR Companies is a multifaceted organization that focuses on championing the people who build the world around us. They achieve this mission by operating across several key industries, including construction, development, energy, real estate, and finance. By integrating these capabilities, they provide the essential resources and expertise required to support the growth and development of the built environment.
New Energy Nexus (NEX) is the world's leading ecosystem of funds and accelerators supporting diverse clean energy entrepreneurs to thrive, from emerging tech through to clean energy distribution and adoption. New Energy Nexus builds ecosystems and runs programs that are locally tailored to support the specific needs of entrepreneurs in that region: providing accelerator services, capital, mentoring, skills, and networks...
Piq Energy helps renewable and load developers connect to the grid faster. Piq automates the detailed technical analysis required to site, size, and interconnect large scale infrastructure like solar + storage projects and datacenters.
At Valar Atomics, we're redefining what's possible in energy. Our mission is to make clean, high-temperature nuclear power scalable—unlocking abundant energy for industry, hydrogen, and next-generation manufacturing. We are a team of builders, engineers, and operators who believe nuclear energy should be fast to deploy, factory-made, and built for the real world. Our first pilot plant in Orangeville, Utah will...
Luminus is a vertically integrated, fast-growing high-tech company that engages in high-power Light-Emitting-Diode (LED) solid-state lighting, lasers, and SiC power semiconductors for a variety of application areas, including industrial UV, IR, medical, projection displays, high-end illumination lighting, horticulture lighting, grid energy storage, EV and automotive industries. Luminus is at the forefront of the ongoing solid-state lighting revolution and SiC power...
