Best Energy Companies in Tennessee, United States
The 109 best Energy companies in Tennessee, United States in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Silicon Ranch.
Our analysis of 171 Energy companies
$71.4b in tracked funding; 82% of the stack-profiled cohort runs cloud-native; funding activity peaked in 2025.
Ranked: Best Energy companies in Tennessee
| # | Company | Disclosed funding | Last round | Employees | Founded | Founder | Tech stack | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | a scott fetzer company A Scott Fetzer Company provides solutions for industrial and commercial manufacturers. | — | — | 43 | 1913 | — | WordPressMySQLPHP+19 | 78 patents Floor cleaning appliances: brushroll, rotary head, and motor control technologies for vacuums | — |
| 2 | ACE, LLC SOLAR Solar energy solutions provider for residential, commercial, and government clients | — | — | — | 2013 | Chuck Boggs President & CEO | — | — | — |
| 3 | Adman Electric Electrical contractor providing a range of services including installation, maintenance, and repairs for… | — | — | 40 | 1975 | Joe Gibson CEO | Squarespace CommerceSquarespaceTypeScript+10 | — | — |
| 4 | air2 AIR 2 provides a helicopter-assisted power transmission line contractor. | — | — | 46 | 1998 | — | — | 2 patents Non‑destructive ultrasonic/EM inspection of wooden structural beams in service | — |
| 5 | Astec Industries Manufacturer of industrial equipments for oil & gas industry | — | — | 7,393 | 1972 | Benjamin Brock CEO | WordPress Block EditorWordPressSentry+29 | 131 patents Advanced combustion burners, carbon‑reduction systems, aggregate drying/mixing, and fiber‑bed mist filtration. | 1 partnership |
| 6 | Battery Sales & Service Distributor of aftermarket batteries | — | — | 30 | 1977 | — | — | — | — |
| 7 | Benchmark Electric Provider of standby power solutions, generator installation, repair, and maintenance | — | — | — | 2004 | — | — | — | — |
| 8 | Blue Earth Resources Provider of fuel refinery services | — | — | 6 | 1984 | Scott Boruff CEO | — | — | — |
Top 12 Energy companies in Tennessee
#1
Series G · Nashville, Tennessee · founded 2010 · 115 employees$1.9Braised▾
developer of solar power projects
- Jun 2025Series G$450.5M
- May 2025Grant (prize money)$3.1M
- Dec 2022Series F$375M
- Jan 2022Series F$775M
#2
Funding Raised · Lenoir City, Tennessee · founded 2021$2.4Mraised▾
Provider of simulation and analysis for the nuclear power industry. The company delivers services through deployment of integral core and plant simulation capabilities. It offers technical expertise to support efficient simulator for multi-cycle core analysis. The company has developed a fast-running three-dimensional simulator for multicycle fuel and core analysis.
- Dec 2025Grant (prize money)$206.5K
- May 2025Grant (prize money)$203.1K
- Apr 2025Grant (prize money)$206.5K
- Jul 2024Grant (prize money)$206.5K
#3
Seed · Oak Ridge, Tennessee · founded 2017 · 8 employees$2.5Mraised▾
Provider of ice thermal energy storage solutions for HVAC systems. It provides an innovative heat exchanger called IHEX, which is used in ice thermal energy storage applications.
- Jul 2025Seed$1M
- Jun 2020Grant (prize money)$1.3M
- Feb 2019Grant (prize money)$224.9K
#4
Early Stage · Memphis, Tennessee · founded 1980 · 268 employees$97Kraised▾
EnSafe is an environmental consulting firm that specializes in providing innovative solutions for clients' environmental, engineering, health & safety, and technology needs. With over 40 years of experience, EnSafe offers custom solutions and creative thinking to navigate complex regulatory compliance issues.
#5
Public · Knoxville, Tennessee · founded 2003 · 26 employees$6.4Mraised▾
Commercial solar solutions and clean energy experts in the Southeast. They are an engineering, procurement, and construction source for solar projects of all sizes, from large commercial installations to small businesses. The team helps clients meet corporate mandates, conserve energy, and save money with solar power. They offer solar power design services, boasting years of experience and certified professionals. They provide solutions for commercial solar projects across North America, serving manufacturing, data centers, professional buildings, agriculture, and utilities. They design solar solutions tailored to specific needs, working with local utilities for smooth interconnection. Their services include commercial solar, electric bill savings, commercial generators, utility/community solar, battery energy storage systems, microgrids, and builder sunbox systems. They also offer solar case studies, project development, resources, and educational programs. They focus on energy independence, environmental sustainability, and demand management.
- May 2024Post IPO$511.8K
- Jan 2021Post IPO$5.8M
- Jul 2016Post IPO$97.5K
#6
Acquired · Nashville, Tennessee · founded 2012 · 46 employees$6.5Mraised▾
Hecate Energy develops, owns, and operates solar, natural gas, wind, and energy-storage projects in the United States, Jordan, Pakistan, Tanzania, and Kenya. The company specializes in thermal and renewable power generation, including coal-fired, gas-fired, hydro-powered, solar-powered, and wind-powered generation. They also specialize in zoning & permitting, community collaboration, financing, etc.
- May 2021Seed—
- Jun 2017Conventional Debt$6.5M
#7
Deadpooled · Nashville, Tennessee · founded 2005$15Mraised▾
Oil & gas production and exploration company
- Mar 2008Conventional Debt$15M
#8
Deadpooled · Nashville, Tennessee · founded 2010 · 6 employees$2.2Mraised▾
New Wind was initially engaged in developing Vertical Axis wind turbines, hybrid light towers, and sustainable telecom solutions, before evolving to more comprehensive solar solutions like solar roofs. Additionally, New Wind also works with energy efficiency products such as LED and Induction lighting for entire buildings or for individual houses.
- Jan 2015Seed$1.2M
- Mar 2012Seed$1M
#9
Seed · Kingsport, Tennessee · founded 2010$1.4Mraised▾
Producer of bio-mass
- Nov 2010Seed$1.4M
#10
Funding Raised · Dyersburg, Tennessee · founded 2003$1.2Mraised▾
Provider of HVAC services and insulation solutions. This includes installation, maintenance, and repair of HVAC systems; spray foam and cellulose insulation application; energy-efficient building assemblies for new construction and renovations; attic, wall, and floor insulation upgrades; and air filter provision. Services address energy efficiency improvements, reducing energy consumption, and enhancing indoor air quality. The company offers service agreements and addresses both residential and commercial needs.
- Jun 2007Grant (prize money)$849.9K
- Jun 2007Grant (prize money)$387.5K
#11
Seed · Germantown, Tennessee · founded 2014$1.3Mraised▾
Provider of investment opportunities for accredited individuals or companies who want to capitalize on U.S. energy resources. The company evaluates and acquires resource-rich real estate and/or mineral rights with the help of geologists, well operators, and engineers, enabling investors to get opportunities for an excellent return on investment.
- Jun 2015Seed$1.3M
#12
Funding Raised · Harriman, Tennessee · founded 2017 · 6 employees$551.8Kraised▾
Developer of a proprietary carbon fiber technology designed to serve the cleantech industries with low-cost, high-grade carbon fiber. The company's technology can be used for high-volume industrial applications including textiles, and composites, providing customers with low-cost and tailor-made carbon fiber solutions.
- Aug 2020Grant (prize money)$275.9K
- Jan 2020Grant (prize money)$275.9K
Funding & investor landscape
Notable founders
Market landscape — 10 sub-themes by coverage
Share of Energy coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
How research on Energy Storage in Tennessee is moving
A read on the academic research around Energy Storage in Tennessee — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 69 papers.
University of Tennessee at Knoxville and peers lead Tennessee's energy-storage research, focusing dominantly on advanced battery technologies and microgrid optimization, with a cautiously optimistic tone (mean stance 0.49).
- University of Tennessee at Knoxville53
- Tennessee Technological University10
- University of Tennessee at Chattanooga6
- University of Tennessee Health Science Center1
- University of Tennessee System1
- Electrochemistry7
- Electrolyte6
- Anode5
- Battery (electricity)4
- Cathode4
- Battery (electricity)1→10
- Photovoltaic system1→4
- Battery (electricity)3
- Nanotechnology3
- Electronics2
- Renewable energy2
- Transformative learning1
Common questions
Riya reads income statements for fun. She covers the real money in a sector — revenue, growth, who actually earns — and never met a vague claim she didn't want a number for.