Best Energy Tech Companies in Boulder, United States
The 47 best Energy Tech companies in Boulder, United States in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Tendril.
Our analysis of 79 Energy Tech companies
$38.9b in tracked funding; 92% of the stack-profiled cohort runs cloud-native; funding activity peaked in 2025.
Ranked: Best Energy Tech companies in Boulder
| # | Company | Disclosed funding | Last round | Employees | Founder | Tech stack | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|
| 1 | Tendril Online building energy management solution for homeowners 57Funding top 19%Growth top 32%Moat top 37%Patents top 40% All 10 signals ▾Fundingtop 19% Growthtop 32% Moattop 37% Patentstop 40% Innovationtop 45% Techtop 48% Talentbottom 49% Marketbottom 43% Globalbottom 39% Newsbottom 27% Funding: Raised $337M across 21 rounds · 21 rounds over 22 yrs (1.0/yr) Growth: Headcount 60 → 86 (+43%) across vintages · Fresh capital in last 24 mo rank vs industry peers · Fliar Intelligence Index 57/100 | $337M | 17 mo ago | 86 | Chris Bahry Co-Founder | Creative Director | Google CloudReactAtlassian Statuspage+20 | 18 patents Adaptive smart‑grid energy management using model‑based simulations and personalized load profiling. | — |
| 2 | Recurve Provider of energy management software | $33M | 15 mo ago | 39 | Matt Golden Founder & CEO | — | — | — |
| 3 | EnergySavvy Online building energy management solution for homeowners | $31M | 117 mo ago | 58 | — | SentryZendeskReact+7 | 3 patents Real‑time analytics for utility program performance and demand‑response evaluation | — |
| 4 | Uplight 🦄 AI and SaaS-driven solutions for energy monitoring in residential and commercial buildings 80News top 22%Tech top 24%Growth top 25%Moat top 31% All 10 signals ▾Newstop 22% Techtop 24% Growthtop 25% Moattop 31% Fundingtop 34% Patentstop 34% Innovationtop 36% Markettop 37% Talenttop 39% Globalbottom 44% News: 8 BI events in 12 mo (of 17 tracked, 5 types) · 2 high-value events (IPO/M&A/funding/contracts) in 12 mo Tech: 45 technologies across 6/8 capability areas · Cloud: Amazon Web Services, Cloudflare rank vs industry peers · Fliar Intelligence Index 80/100 | $30M | 17 mo ago | 496 | Luis D'Acosta CEO | WordPressAlgoliaMySQL+27 | 20 patents Residential energy management and demand‑response platforms optimizing HVAC and rebate incentives | 1 launch · 1 award |
| 5 | Odyssey Energy Solutions Provider of end-to-end platform for distributed renewable energy finance | $28M | 19 mo ago | 8 | Piyush Mathur Co-Founder & MD & CBO | SentryTypeScriptKaTeX+19 | — | 1 job opening |
| 6 | Tynt Manufacturer of smart windows 40Talent top 28%Innovation top 32%Product top 36%Funding top 42% All 7 signals ▾Talenttop 28% Innovationtop 32% Producttop 36% Fundingtop 42% Techbottom 39% Globalbottom 37% Marketbottom 26% Talent: 3 named leaders on record · 3 C-suite/founder profiles curated Innovation: 12 product lines · Deep-tech classification: Tech Hardware rank vs industry peers · Fliar Intelligence Index 40/100 | $14M | 9 mo ago | 21 21 → 17 (-19%) | Mike Mcgehee Co-Founder | ReactGatsbyNetlify+5 | — | — |
| 7 | Black Bear Energy Provider of solar and energy storage solutions for commercial real estate. | $10M | 93 mo ago | 19 19 → 26 (+37%) | — | — | — | — |
| 8 | Simple Energy Customer engagement platform for energy savings | $9M | 106 mo ago | 65 | — | — | — | — |
| 9 | Cool Energy Stirling engine technology for clean energy generation and thermal management | $3M | 119 mo ago | 6 | — | — | 189 patents Biochar production and functionalization for soil amendment, seed coating, and plant growth enhancement. | — |
| 10 | Distill Developer of a platform for forecasting and simulating energy grid behavior | $2M | 5 mo ago | — | Sonya Gustafson Co-Founder & Chief Product Officer | — | — | — |
| 11 | GrowRay Manufacturer of LED grow lights for indoor farming | $2M | 78 mo ago | 4 | Erico Mattos Co-Founder | — | — | — |
| 12 | Simuwatt Energy audit software tool | $1M | 31 mo ago | 8 | — | — | — | — |
| 13 | LightStanza Software for providing daylight analysis for buildings | $1M | 173 mo ago | 5 | Daniel Glaser Founder | — | — | 3 launchs |
| 14 | Rolling Energy Resources Provider of electric vehicle load management solutions via onboard telematics | $650K | 49 mo ago | 17 | — | — | — | — |
| 15 | Mana Battery Developer of high-energy sodium-ion battery cells and electrolytes | $275K | 14 mo ago | — | Tyler Evans Co-Founder & CEO | WixSentryBootstrap+10 | — | 1 partnership |
| 16 | Newskyenergy Developer of chemical technologies for industrial waste conversion and gas treatment | $218K | 197 mo ago | 12 | — | — | — | — |
Top 12 Energy Tech companies in Boulder
#1
Acquired · Boulder, Colorado · founded 2004 · 86 employees$336.7Mraised▾
Online building energy management solution for homeowners. Offers software to increase energy efficiency for homeowners. The Company provides software systems that integrate with utility and government energy efficiency programs to help guide homeowners and commercial businesses.
- Mar 2025Series E$58M
- Dec 2021Series E$101.9M
- Dec 2018Series E—
- Mar 2018Series E—
#2
Series A · Boulder, Colorado · founded 2020 · 21 employees$14.1Mraised▾
Manufacturer of smart windows. It provides users with a company that develops smart windows that are climate-friendly and adapt to changing needs throughout the day. These windows aim to reduce heating and energy loss in homes.
- Oct 2025Series A$2.7M
- Apr 2023Series A$7.1M
- 2022Seed—
- Oct 2021Angel$1.5M
#3
Seed · Boulder, Colorado · founded 2025$2.2Mraised▾
Developer of a platform for forecasting and simulating energy grid behavior. The platform brings together probabilistic power flow, long-horizon fundamentals, and a forward evolving grid model. It reveals congestion, curtailment and price risk years before it materializes, enabling better decision-making.
- Mar 2026Seed$2.2M
#4
Acquired · Boulder, Colorado · founded 2004 · 39 employees$33Mraised▾
Provider of energy management software. It develops and provides internet-based home performance software solutions for contractors and companies which provide home energy audits and residential retrofits. It offers energy modelling, reporting, pricing software tools, home energy audits, and green energy remodelling services.
- Apr 2025Series B$12.3M
- May 2022Series B$19M
- Jun 2010Series B$8M
- Sep 2008Series A$6M
#5
Uplight 🦄Acquired · Boulder, Colorado · founded 2019 · 496 employees$30Mraised▾
AI and SaaS-driven solutions for energy monitoring in residential and commercial buildings. It provides energy management systems designed to offer control, demand response, electric vehicle charging, and distributed generation support.
- Mar 2025Series A$30M
- Mar 2021Seed—
#6
Series A · Boulder, Colorado · founded 2017 · 8 employees$27.6Mraised▾
Provider of end-to-end platform for distributed renewable energy finance. It accelerates capital deployment for renewable energy projects. The platform offers tools for portfolio management, supply chain credit, asset analytics, and results-based finance. It serves financiers, renewable energy companies, and equipment suppliers, streamlining project development and improving access to capital. The platform facilitates various aspects of project lifecycle, from initial financing to operational monitoring. It provides solutions to overcome bottlenecks in distributed renewable energy project development.
- Dec 2024Series A$11.3M
- May 2023Series A$15M
- Sep 2022Seed$5.3M
- Jul 2022Seed$7.2M
#7
Funding Raised · Boulder, Colorado · founded 2023$275Kraised▾
Developer of high-energy sodium-ion battery cells and electrolytes. It is scaling high-energy "anode-free" sodium battery cells, exceeding LFP Li-ion Wh/L, and aims to manufacture through partnerships. The company's fire-extinguishing electrolyte molecules and formulations are tailored to the needs of sodium batteries, developed for calendar and cycle lifetime, safety, and cost across multiple cell chemistries.
- May 2025Grant (prize money)$275K
#8
Seed · Boulder, Colorado · founded 2006 · 8 employees$1.4Mraised▾
Energy audit software tool. It is a cloud-based, tablet and desktop software application that lowers the time and cost of providing commercial building energy assessments. It connects and reports on data to collaboratively generate and organize data for whole building energy modeling and analysis. The data are used to drive energy-based capital improvements for the entire building lifecycle.
- Jan 2024Seed$1.9M
- Apr 2019Seed$200K
- Sep 2017Conventional Debt$50K
- Mar 2017Seed—
#9
Acquired · Boulder, Colorado · founded 2008 · 58 employees$31.3Mraised▾
Online building energy management solution for homeowners. Offers software to increase energy efficiency for homeowners. The Company provides software systems that integrate with utility and government energy efficiency programs to help guide homeowners and commercial businesses.
- Oct 2016Series D$14.1M
- Aug 2015Series C$3.6M
- Jul 2014Series C$8.2M
- Aug 2012Series B$3.2M
#10
Acquired · Boulder, Colorado · founded 2015 · 19 employees$10.5Mraised▾
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- Nov 2018Series A$5.7M
- Feb 2018Series A$1.8M
- Aug 2016Series A$2.5M
- 2015Seed$500K
#11
Series B · Boulder, Colorado · founded 2011 · 65 employees$9.3Mraised▾
Customer engagement platform for energy savings. The platform develops an online customer engagement platform that helps users to understand their energy use. The company’s Software-as-a-Service platform engages customers and delivers energy efficiency, demand-side management, and smart grid results. It supports utility smart grid, energy efficiency, and demand response programs.
- Oct 2017Series B$200K
- Jan 2014Series B$6.1M
- Feb 2013Series A$2M
- Sep 2011Seed$900K
#12
Series A · Boulder, Colorado · founded 2006 · 6 employees$3.5Mraised▾
Stirling engine technology for clean energy generation and thermal management. They specialize in designing and developing advanced Stirling cycle machines for power generation from various heat sources and heat pumping applications. Their expertise lies in creating efficient, low-maintenance engines suitable for industrial processes, solar, and geothermal energy. They offer consulting services, design licensing, and collaboration opportunities for energy management and power generation projects. Their technology promotes clean energy solutions and efficient thermal energy utilization. They focus on innovation and sustainable energy practices.
- Aug 2016Series A$1.5M
- Jul 2013Grant (prize money)$1M
- Jun 2012Grant (prize money)$1.1M
- Jun 2012Grant (prize money)$1.1M
Funding & investor landscape
Notable founders
Market landscape — 10 sub-themes by coverage
Share of Energy Tech coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
What Boulder researches in energy storage
- University of Colorado Boulder30
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.