The Geothermal Energy sector in Illinois is growing, with a range of companies utilizing the Earth's natural heat to generate power. Such companies are diverse, offering services from sustainable energy solutions to advanced drilling and trenching for geothermal loop field installations. As concerns over climate change and carbon emissions rise, this innovation-driven field expands, poised to provide Illinois with increasingly cleaner, cost-effective, and sustainable energy alternatives.


Top 25 geothermal energy companies in Illinois

1. Carbon Solutions Group

Carbon Solutions Group is a company that offers various sustainable energy solutions, including geothermal systems, electric vehicle charging infrastructure, and environmental credit aggregation. They provide services to residential and commercial customers and aim to reduce carbon emissions and promote clean energy.


2. Endurant Energy

  • Website: endurant.com
  • Headquarters: Chicago, Illinois, United States
  • Founded: 2005
  • Headcount: 11-50
  • LinkedIn

Endurant is a market-leading distributed energy solutions provider, owner, and operator. With extensive expertise in all of the technologies they build, including Combined Heat and Power, Energy Foundations, Energy Storage, Fuel Cell, Geothermal, Microgrid, and Solar, Endurant offers reliable, resilient, clean, and cost-effective energy infrastructure solutions.


3. Durbin Geothermal, INC. (durbin Enterprises, INC.)

  • Website: letsdig.com
  • Headquarters: Beecher City, Illinois, United States
  • Founded: 2009
  • Headcount: 11-50
  • LinkedIn

LetsDig.com is the website of Durbin Geothermal, a family-owned business that provides innovative drilling and trenching solutions. They specialize in environmentally-friendly geothermal loop field installations and offer free onsite consultations and estimates.


4. Enertech Global, LLC

EnertechUSA is a company that specializes in energy-efficient solutions for heating, cooling, and hot water generation. They offer innovative products such as air-to-water heat pumps and geothermal systems. With a focus on sustainability and quality, EnertechUSA aims to make energy independence accessible through their exceptional products and support.


5. green HVACR Magazine

  • Website: greenhvacrmag.com
  • Headquarters: Chicago, Illinois, United States
  • Headcount: 51-200

Green HVACR Magazine is a publication that focuses on news, products, and ideas within the HVACR industry, with an emphasis on sustainability and efficiency.


6. Energy Capital Ventures

Energy Capital Ventures is leading the green moleculeTM revolution to decarbonize the environment and achieve net-zero emissions through innovation and technology.


7. Henneman Engineering Inc.

  • Website: henneman.com
  • Headquarters: Champaign, Illinois, United States
  • Founded: 1961
  • Headcount: 51-200
  • LinkedIn

Henneman Engineering, Inc. is an information technology services company specializing in commercial building information modeling (BIM). They provide services in co-generation, sustainable energy, electrical, geothermal, lighting design, and more. With over 55 years of experience, they offer construction administration, commissioning services, and plant operation. Henneman Engineering serves a wide range of clients including sports and recreation facilities, government institutions, healthcare centers, and educational organizations.


8. Indeck Energy Services

Indeck Energy is a leading developer of power generation projects, specializing in utility-scale power generation projects across a wide range of technologies. With over $2 billion in financing closed, Indeck Energy offers straight corporate finance to multi-tiered, non-recourse debt with tax-advantaged equity structures and multiple currencies. They manage all engineering procurement and construction activities and work closely with local government officials, citizens, and other community stakeholders to address concerns and demonstrate benefits to the community. Indeck Energy aims to bring innovation and sustainability to every project, overseeing construction to ensure safety, timeliness, and budget adherence.


9. LanzaJet

  • Website: lanzajet.com
  • Headquarters: Chicago, Illinois, United States
  • Founded: 2020
  • Headcount: 51-200
  • Latest funding type: Grant
  • LinkedIn

Lanzajet.com is a leading technology and process company focused on addressing climate change and helping countries, companies, and industries achieve carbon reduction goals. They offer renewable fuels, low carbon hydrogen, and GHG offsets to contribute to net-zero CO2 emissions.


10. Greencells

GreenCells.org is a company that offers sustainable energy solutions. They specialize in renewable energy technologies such as solar power, wind power, and energy storage. Their aim is to provide clean and reliable energy sources to both residential and commercial customers.


11. Bluestar Energy Capital

Bluestar Energy Capital is an investment firm focused on the energy transition. We work with global investors to fund and support projects in the renewable energy sector. Our portfolio includes various initiatives aimed at reducing carbon emissions and promoting sustainable energy sources.


12. New Generation Power

New Generation Power is a company that develops renewable power projects with diverse technologies to make an impact on climate change and create a low-carbon future.


13. Delta Mining

  • Website: delta-mining.com
  • Headquarters: Chicago, Illinois, United States
  • Founded: 2021
  • Headcount: 11-50
  • Latest funding type: Seed
  • LinkedIn

Delta Mining offers sustainable blockchain services with low cost renewable green energy at mining sites in Paraguay and Brazil. They provide hardware and hosting services for clients worldwide, operating with high renewable energy penetration to support infrastructure development. Their digital solutions are developed using 100% renewable energy, surplus power, and cost-efficient operations.


14. Hovey Energy, LLC

Hovey Energy is a company focused on selling energy solutions for a sustainable future.


15. Headline Solar

Headline Solar is a leading provider of residential battery systems and solar integration technology. With a focus on safety and sustainability, they offer cobalt-free battery systems that seamlessly integrate with solar and home automation systems. Backed by an unbeatable warranty, their smart solutions keep homes powered during power outages for cleaner, healthier living.


16. Synergy Power Solutions

Synergy Power Solutions is an energy services provider that offers energy procurement, HVAC load reduction, and renewable energy solutions. With a combined effort, they help their customers achieve significant energy savings.


17. EZ Blockchain

EZ Blockchain is a tech company that solves the global waste energy problem using crypto mining. They leverage renewable energy sources such as wind and solar to transform wasted energy into a new revenue stream in cryptocurrency. With their SmartGrid™ system, they reduce CO2 emissions by up to 70% while providing a profitable and sustainable solution for the oil and gas industry.


18. Patriot Renewable Fuels, LLC

Patriot Renewable Fuels is a company that specializes in the production and sale of renewable fuels. They offer a sustainable and environmentally-friendly alternative to traditional fossil fuels.


19. SunStyle

  • Website: sunstyle.com
  • Headquarters: Skokie, Illinois, United States
  • Founded: 2007
  • Headcount: 11-50
  • LinkedIn

SunStyle offers clean and sustainable energy solutions through their solar roof products. They prioritize the combination of environmental friendliness and aesthetic appeal, ensuring that solar energy production does not compromise the preservation of historical roofscapes and townscapes. They provide solar shingles and roofing materials that are durable and efficient, even in harsh weather conditions. SunStyle welcomes partnerships with certified installers and is committed to the clean energy transition.


20. Mobility Innovation

  • Website: emobility.com
  • Headquarters: Naperville, Illinois, United States
  • Founded: 2007
  • Headcount: 51-200
  • LinkedIn

Emobility.com is a company that offers sustainable and innovative solutions for electric transportation, such as electric bikes, scooters, and charging stations.


21. Energize Ventures

  • Website: energize.vc
  • Headquarters: Chicago, Illinois, United States
  • Founded: 2016
  • Headcount: 11-50
  • LinkedIn

Energize.vc is a company focused on scaling sustainable innovation through climate software.


22. VGI Energy Solutions

  • Website: vgienergy.com
  • Headquarters: Chicago, Illinois, United States
  • Founded: 2009
  • Headcount: 11-50
  • LinkedIn

VGI Energy is a company that offers clean energy solutions to a diverse range of clients and aims to break down the barriers to cleaner energy. They offer a range of services and expertise to ensure that their clients can access renewable energy solutions.


23. Leading Solar Solutions

Leading Solar Solutions is a company committed to providing alternate energy solutions through the research, installation, monitoring, testing, and support of EV Chargers, Solar Panels, and LED Retrofits, for a more sustainable future.


24. Mobius Solar

Mobius Solar is a solar installation company in Illinois that offers residential and small business solar solutions using high-quality equipment for less cost.


25. SoCore Energy

Clean Energy Project Builder (CEPB) is a directory that connects individuals and organizations with service providers in the solar and wind energy industries. It also allows users to add their installed solar or wind projects to the map to share with others.


Want to find more geothermal energy companies?


If you want to find more companies that ...provide services like sustainable energy solutions and innovative drilling you can do so with Inven. This list was built with Inven and there are hundreds of companies like these globally.


With Inven you'll also get to know the company's:


  • Ownership: Which of these are private equity backed? Which are family-owned?
  • Contact data: Who are the owners and CEO's? What are their emails and phone numbers?
  • Financials: How do these companies perform financially? What are their revenues and profit margins?

...and a lot more!