Top 24 Green Energy startups in Houston
Feb 24, 2026
|
Like
21
1
Funding: $3.2B
Sunnova provides low-cost solar power to homes. It owns the equipment, installs it, and also eventually sells the electricity it creates to customers.
Sunnova provides low-cost solar power to homes. It owns the equipment, installs it, and also eventually sells the electricity it creates to customers.
2
Funding: $1.5B
Fervo Energy is developing proprietary technology for developing and operating geothermal assets. Like its main competitors, Fervo uses hydraulic fracturing and directional drilling techniques borrowed from the oil and gas industry. However, Fervo can drill faster and deeper than existing geothermal developers to exploit hotter rocks and generate more energy at a lower cost. The startup is completing construction of its first large-scale power plant and has begun developing several other sites in the western US, where hot rocks are closer to the surface. Among its key investors is Google, which views geothermal energy as a potential solution for its data centers.
Fervo Energy is developing proprietary technology for developing and operating geothermal assets. Like its main competitors, Fervo uses hydraulic fracturing and directional drilling techniques borrowed from the oil and gas industry. However, Fervo can drill faster and deeper than existing geothermal developers to exploit hotter rocks and generate more energy at a lower cost. The startup is completing construction of its first large-scale power plant and has begun developing several other sites in the western US, where hot rocks are closer to the surface. Among its key investors is Google, which views geothermal energy as a potential solution for its data centers.
3
Funding: $855.8M
Solugen has developed a unique process for the synthesis of hydrogen peroxide inspired by principles of cancer biology.
Solugen has developed a unique process for the synthesis of hydrogen peroxide inspired by principles of cancer biology.
4
Funding: $114M
Sage Geosystems develops geothermal and energy storage technologies that use subsurface heat and pressure to generate and store electricity.
Sage Geosystems develops geothermal and energy storage technologies that use subsurface heat and pressure to generate and store electricity.
5
Funding: $108.3M
GoExpedi is a platform for the oil and gas industry to more efficiently procure critical parts and supplies
GoExpedi is a platform for the oil and gas industry to more efficiently procure critical parts and supplies
6
Funding: $106M
Syzygy Plasmonics is creating a hydrogen fuel cell technology that produces a cheaper source of energy that releases fewer carbon emissions.
Syzygy Plasmonics is creating a hydrogen fuel cell technology that produces a cheaper source of energy that releases fewer carbon emissions.
7
Funding: $50M
ComboCurve is a Fintech business that focuses on good predictions and cash flow analysis in the energy sector.
ComboCurve is a Fintech business that focuses on good predictions and cash flow analysis in the energy sector.
8
Funding: $31.3M
Quidnet Energy develops long-duration geomechanical energy storage systems. This new form of underground pumped-storage hydroelectric power generation utilizes existing natural resources. Each module is manufactured using traditional drilling processes and standardized hydromechanical energy conversion components. The modules operate within a closed-loop water system designed to prevent energy loss through evaporation. When excess power is available, it is used to pump water from a pond into a borehole, maintaining it under pressure. The borehole is then closed, maintaining the stored energy under pressure for as long as needed. When power is needed, the borehole is opened, allowing the pressurized water to pass through a turbine to generate electricity and return to the pond for the next cycle.
Quidnet Energy develops long-duration geomechanical energy storage systems. This new form of underground pumped-storage hydroelectric power generation utilizes existing natural resources. Each module is manufactured using traditional drilling processes and standardized hydromechanical energy conversion components. The modules operate within a closed-loop water system designed to prevent energy loss through evaporation. When excess power is available, it is used to pump water from a pond into a borehole, maintaining it under pressure. The borehole is then closed, maintaining the stored energy under pressure for as long as needed. When power is needed, the borehole is opened, allowing the pressurized water to pass through a turbine to generate electricity and return to the pond for the next cycle.
9
Funding: $31.3M
Amperon is a provider of a digital smart meter platform that delivers real-time energy data forecasts and analytics.
Amperon is a provider of a digital smart meter platform that delivers real-time energy data forecasts and analytics.
10
Funding: $24.3M
Innowatts’ platform transforms how energy providers understand and serve their customers. We use AI to unlock meter-level data, provide consumer insights and make businesses processes automated and smarter for energy retailers, utilities and grid operators.
Innowatts’ platform transforms how energy providers understand and serve their customers. We use AI to unlock meter-level data, provide consumer insights and make businesses processes automated and smarter for energy retailers, utilities and grid operators.
11
Funding: $17M
Sage combines innovative approaches to heat harvesting with modern oilfield expertise and methodologies to enable geothermal energy anywhere in the world
Sage combines innovative approaches to heat harvesting with modern oilfield expertise and methodologies to enable geothermal energy anywhere in the world
12
Funding: $13.6M
ignis H2 Energy Inc is a Geothermal exploration and development company that mainly provides sustainable green energy.
ignis H2 Energy Inc is a Geothermal exploration and development company that mainly provides sustainable green energy.
13
Funding: $10.1M
Aeromine Technologies provides bladeless wind energy solutions for building environment that is motionless.
Aeromine Technologies provides bladeless wind energy solutions for building environment that is motionless.
14
SOTAOG application is specially designed to provide owners and operators in the oil and gas industry with a one-stop, fully-integrated solution for capturing and transforming field and operational data into real-time business intelligence that helps improve operational response, enhance business decisions and drive revenue growth.
15
Funding: $6.2M
Revterra enables quick, cost-effective and simple installation of high-powered DC fast EV chargers
Revterra enables quick, cost-effective and simple installation of high-powered DC fast EV chargers
16
Funding: $5.5M
INOVUES is a window technology company that provides the only solution that enables existing building facades to be retrofitted with the latest energy-saving and smart glass innovations without removal or replacement
INOVUES is a window technology company that provides the only solution that enables existing building facades to be retrofitted with the latest energy-saving and smart glass innovations without removal or replacement
17
Funding: $5M
Nanotech is a material science company that focuses on using Nano Technology to fireproof and reduce global energy consumption.
Nanotech is a material science company that focuses on using Nano Technology to fireproof and reduce global energy consumption.
18
Funding: $3.2M
Criterion Energy Partners is developing distributed energy projects to provide clean, reliable, always on energy using heat from the Earth
Criterion Energy Partners is developing distributed energy projects to provide clean, reliable, always on energy using heat from the Earth
19
Funding: $1.8M
REVOLUTION Turbine Technologies is developing a compact, emissions-free turbine that generates power using only waste gas pressure.
REVOLUTION Turbine Technologies is developing a compact, emissions-free turbine that generates power using only waste gas pressure.
20
There are over 3 million pipelines in the US today. These are becoming increasingly idle. Breeze will make these idle pipelines into Green Energy highways that can generate electricity where needed.
21
Funding: $200K
Renascent Energy Management is a privately held, technology-focused energy firm that is looking at several geothermal technologies to implement in the US and abroad.
Renascent Energy Management is a privately held, technology-focused energy firm that is looking at several geothermal technologies to implement in the US and abroad.
22
Pressure Corp is developing waste pressure power systems to help midstream gas companies solve how they reduce emissions by providing the technology, capital and expertise required to achieve their environmental, social and governance goals.
23
Gold Hydrogen is a low-carbon fuel source that reshapes the world’s transition away from fossil fuels. Extracted from existing oil and gas sites that would have otherwise been abandoned, Gold Hydrogen makes inexpensive, eco-friendly hydrogen more accessible to refineries, power plants, and everyone seeking to meet their environmental—and financial—goals
24
Apex is a Texas-based company created to develop, construct, own and operate compressed air energy storage (CAES) plants.
★
See also:
