Best Energy Companies in District of Columbia, United States
The 62 best Energy companies in District of Columbia, United States in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Evergreen Solar.
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 District of Columbia
| # | Company | Disclosed funding | Last round | Employees | Founded | Founder | Tech stack | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Evergreen Solar Unbiased solar guidance, connecting homeowners with the best solar solutions | $449M | 194 mo ago | 174 | 1994 | — | WordPressMySQLPHP+10 | 166 patents Manufacturing and processing of crystalline silicon photovoltaic wafers, focusing on growth stability, resistivity uniformity, and | — |
| 2 | Summit Ridge Solar project developers | $175M | 47 mo ago | 96 | 2017 | Steve Raeder CEO | WordPress Block EditorWordPressMySQL+27 | — | 1 job opening · 1 internship · 1 award |
| 3 | Last Energy Developer of small modular reactor 45Funding top 30%Growth top 45%Talent bottom 49%Tech bottom 48% All 7 signals ▾Fundingtop 30% Growthtop 45% Talentbottom 49% Techbottom 48% Globalbottom 39% Marketbottom 36% Newsbottom 36% Funding: Raised $64.0M across 4 rounds · 4 rounds over 7 yrs (0.6/yr) Growth: Web rank 5,000,000 → 10,000,000 YoY · Fresh capital in last 24 mo rank vs industry peers · Fliar Intelligence Index 45/100 | $64M | 6 mo ago | 45 | 2019 | Bret Kugelmass CEO | WebflowGSAPcore-js+15 | — | 1 launch |
| 4 | New Columbia Solar Developer of solar energy projects | $40M | 73 mo ago | 53 | 2016 | Michael Healy CEO | — | — | — |
| 5 | PetroNova Acquisition, Exploration and Development in South America | $38M | 165 mo ago | 34 | 2009 | Andrew Healy CEO | — | — | — |
| 6 | Crux Provider of clean energy training and consulting services 32Funding top 30%Growth top 36%Talent top 38%Product top 41% All 9 signals ▾Fundingtop 30% Growthtop 36% Talenttop 38% Producttop 41% Techtop 46% Newstop 48% Globalbottom 39% Marketbottom 25% Innovationbottom 24% Funding: Raised $27.1M across 5 rounds · 5 rounds over 3 yrs (1.7/yr) Growth: 1 acquisition/expansion move in 24 mo · Fresh capital in last 24 mo rank vs industry peers · Fliar Intelligence Index 32/100 | $27M | 1 mo ago | 14 | 2023 | Alfred Johnson Co-Founder & CEO | WebflowApple iCloud MailGoogle Workspace+17 | — | 2 job openings |
| 7 | Groundswell Building community power through clean energy and resilience solutions 42Innovation top 32%Patents top 33%Funding top 41%Product top 46% All 8 signals ▾Innovationtop 32% Patentstop 33% Fundingtop 41% Producttop 46% Talentbottom 49% Techbottom 47% Globalbottom 41% Marketbottom 34% Innovation: 18 patents (top 54% of patent-holders) · 3 filings since 2022 vs 0 in 2017-21 Patents: 18 patents matched (strict assignee match) · 3 filings since 2022 vs 0 in 2017-21 rank vs industry peers · Fliar Intelligence Index 42/100 | $23M | 13 mo ago | 39 | 2009 | Michelle Moore Chief Executive Officer | WordPressMySQLPHP+23 | 18 patents Environmental water resource monitoring and compliance‑constrained predictive analytics solutions. | — |
| 8 | Zeno Power Developer of nuclear energy projects | $20M | 17 mo ago | 39 | 2015 | Tyler Bernstein Co-Founder & CEO | WebflowProton MailApple iCloud Mail+14 | — | — |
| 9 | CleanChoice Energy Renewable energy provider offering clean electricity solutions for a sustainable future | $17M | 149 mo ago | 154 | 2011 | — | ContentfulApple iCloud MailGoogle Workspace+35 | — | — |
| 10 | CURIO Startup focused on revolutionizing the energy landscape through its nuclear waste recycling process | $14M | 26 mo ago | 11 | 2021 | Yehudah Moskowitz Co-Founder & Vice Chairman | WordPressApple iCloud MailMySQL+16 | 58 patents Advanced nuclear fuel recycling and molten‑salt reactor technologies, plus AI‑driven video analytics | 1 award |
| 11 | Solena Developer of plasma gasification vitrification technology intended to produce synthetic fuel gas | $13M | 152 mo ago | — | 2001 | Robert T Do CEO & President | — | 10 patents Plasma pyrolysis gasification/vitrification of waste/biomass for hydrogen production | — |
| 12 | EarthSpark International Empowering communities with resilient energy systems and innovative solutions | $10M | 73 mo ago | — | 2008 | Daniel Schnitzer Founder | — | — | — |
| 13 | Nextility Energy Savings Company | $10M | 139 mo ago | 56 | 2009 | — | — | 3 patents Software platforms for automated energy market brokering and trading | — |
| 14 | Netzero QOF Manufacturer of electric utility | $8M | 50 mo ago | — | — | — | — | — | — |
| 15 | Energicity Renewable energy utility providing power to off-grid communities in West Africa | $3M | 73 mo ago | 60 | 2015 | Nicole Poindexter Co-Founder & CEO | WordPress Site EditorWordPressMySQL+14 | — | — |
| 16 | Redball Energy Solar energy company provides financial products for residential and commercial solar development | $2M | 38 mo ago | — | 2021 | Nick Giannotti Co-Founder & Chief Investment Officer | WebflowCalendlyjQuery+7 | — | — |
| 17 | Clean Power Manufacturer of wind and solar equipments | $325K | 186 mo ago | 194 | 1990 | — | WordPressApple iCloud MailMicrosoft 365+27 | 152 patents Patents concentrated in computing, sensing & instrumentation | — |
| 18 | Energy Finders Oil and gas exploration and development company | $150K | 41 mo ago | — | — | Mohammed Zulfiquar CEO | — | — | — |
Top 12 Energy companies in District of Columbia
#1
Series B · Washington, DC, District of Columbia · founded 2023 · 14 employees$27.1Mraised▾
Provider of clean energy training and consulting services
- May 2026Conventional Debt$500M
- Apr 2025Series B$50M
- Jan 2024Series A$18.2M
- Jun 2023Seed$4.2M
#2
Series C · Washington, DC, District of Columbia · founded 2019 · 45 employees$64Mraised▾
Developer of small modular reactor
- Dec 2025Series C$100M
- Aug 2024Series B$40M
- 2021Series A$21M
- 2019Seed$3M
#3
Funding Raised · Washington, DC, District of Columbia · founded 2009 · 39 employees$22.6Mraised▾
Building community power through clean energy and resilience solutions. The organization focuses on increasing local resilience and cutting electricity bills for communities. They achieve this through community solar projects, resilience hubs, and residential energy efficiency programs. These initiatives aim to preserve affordable housing, strengthen the grid, and support local economic development. The organization leverages a data platform and ethical AI to connect people with projects, delivering sustainable results. They serve rural, small-town, and urban communities, tailoring programs to local priorities. Their work includes home safety and efficiency upgrades, workforce training, and small business support. They partner with local utilities, nonprofits, and churches to deliver energy solutions. The organization's initiatives promote social impact by empowering communities and ensuring energy affordability. They use data and AI to simplify enrollment in energy programs.
- May 2025Grant (prize money)$729.4K
- May 2025Grant (prize money)$20M
- Feb 2025Grant (prize money)$729.4K
- Feb 2025Grant (prize money)$1.2M
#4
Series B · Washington, DC, District of Columbia · founded 2015 · 39 employees$20Mraised▾
Developer of nuclear energy projects
- Jan 2025Series B$53.8M
- Apr 2022Series A$20M
#5
Series D · Washington, DC, District of Columbia · founded 2017 · 96 employees$175Mraised▾
Summit Ridge develops and finances solar power plants across the United States. The company develops multiple forms of plants, both grid connected as well as off grid and energy storage backed systems. The company primarily sets up solar power plants for commercial and public sector organisations. The team consists of Ex-SunEdison employees.
- Jul 2022Series D$175M
- Jun 2022Conventional Debt—
- Jun 2017Seed—
#6
Public · Washington, DC, District of Columbia · founded 1994 · 174 employees$449.5Mraised▾
Unbiased solar guidance, connecting homeowners with the best solar solutions. We are a non-profit organization dedicated to educating homeowners and businesses about the economic and environmental advantages of photovoltaic solar energy. Our mission is to accelerate solar panel adoption across homes, schools, and businesses. We connect homeowners with top manufacturers, suppliers, equipment, and installers, promoting both national and local brands. A nationwide directory of vetted installers is being developed, ranked by feedback from city inspectors, utility companies, the Better Business Bureau, and customer surveys. We are supported by grants and offer scholarships and classroom grants. Job opportunities are available for solar enthusiasts, including remote work options with modern communication tools. We seek marketers, copywriters, and subject matter experts. Our work has a social impact by promoting clean energy and environmental sustainability.
- Apr 2010Post IPO$165M
- Jun 2005Post IPO$75M
- Jun 2005Post IPO$90M
- Mar 2003Post IPO$29.5M
#7
Seed · Washington, DC, District of Columbia · founded 2021 · 11 employees$14.1Mraised▾
Startup focused on revolutionizing the energy landscape through its nuclear waste recycling process. The company has developed a chemical process to convert nuclear waste into usable products, such as fuel for advanced nuclear reactors.
- Apr 2024Seed$14M
- Aug 2023Seed$100K
#8
Series C · Washington, DC, District of Columbia · founded 2016 · 53 employees$40Mraised▾
Developer of solar energy projects
- May 2020Series C$40M
#9
Deadpooled · Washington, District of Columbia · founded 2009 · 34 employees$37.7Mraised▾
Explorer and developer of oil and natural gas resources based in Bogota D.C, Colombia. The company engages in the acquisition, exploration and development of oil and natural gas resources in South America.
- Sep 2012PE$27M
- Dec 2010Series B$10.7M
#10
Series A · Washington, DC, District of Columbia$7.7Mraised▾
Manufacturer of electric utility
#11
Seed · Washington, DC, District of Columbia · founded 2021$2.5Mraised▾
Solar energy company provides financial products for residential and commercial solar development. It partners with solar developers by providing financial solutions to facilitate solar projects. The company focuses on removing financial obstacles in solar development, offering specialized financial products and streamlined payment processes. The company aims to build sustainable, long-term partnerships with solar development companies.
- Apr 2023Seed$2.5M
#12
Acquired · Washington, DC, District of Columbia · founded 2011 · 154 employees$16.6Mraised▾
Renewable energy provider offering clean electricity solutions for a sustainable future. The company supplies % renewable energy from regional wind and solar farms, empowering individuals and businesses to reduce their carbon footprint without installations or changes to their utility provider. They build clean energy projects and are committed to creating a better environment for future generations. The company offers a seamless way to contribute to a clean energy future with dedicated customer care and growing climate solutions. They are focused on making clean air and renewable energy available to all. The company provides clean electricity products and generation services. They are committed to caring for their customers, their people, and the planet. The company is focused on social impact by providing renewable energy and fighting climate change. They offer subscription services for clean energy.
- Jan 2014Series A$12M
- Jul 2013Series A$2.1M
- Dec 2012Series A$2.4M
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 Grid Energy Storage is moving in the United States
A read on the academic research around Grid Energy Storage — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 5,941 United States-affiliated papers.
- Electric Power Research Institute204
- Pacific Northwest National Laboratory202
- Argonne National Laboratory193
- Northeastern University151
- Massachusetts Institute of Technology124
- Battery (electricity)57→359
- Electrolyte37→318
- Electrochemistry30→240
- Cathode32→224
- Anode37→209
- Renewable energy40→492
- Battery (electricity)59→507
- Power (physics)8→227
- Electrolyte27→244
- Electrochemistry37→240
- Battery (electricity)35→184
- Renewable energy24→156
- Electrolyte13→114
- Electrochemistry10→80
- Cathode9→72
Where energy storage is researched across United States
Location clusters by institution affiliation — each city's volume, stance tone, and a quick read on its hot topic, what's advancing, the opening opportunity, and the main concern.
Who's filing energy storage patents in the United States
United States energy storage patent filing is accelerating — 8,522 filings from 3,681 assignees (2016–2025), led by General Electric, ESS Technology, GM Global TECH Operations; annual filings 687→1058.
- General Electric592
- ESS Technology276
- GM Global TECH Operations233
- Fastcap Systems205
- UNIV California180
- Rondo Energy157
- United Technologies154
- Battelle Memorial Institute146
Common questions
Rohit lives in the feed. He covers what's moving right now — the funding rounds, launches and shifts breaking across the trade press — and ties them back to where the sector is heading.