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Energy Efficiency Startups

Updated July 2026

Companies in the energy efficiency sector developing innovative solutions and technologies.

Explore 413 recently funded energy efficiency companies with verified founder contact information and fundraising data.

Total Companies
413
Total Funding
$132.1M
Avg Funding
$5.3M
Global Reach
6
countries

Top Cities for Energy Efficiency

Newark
Brooklyn
Bolton
Stony Brook
Vancouver
Budapest

Recently Funded Companies

Export
Newark, United States

NuWorld Energy is a solar power company that provides complete services and solutions for energy efficiency improvements.

$250K raised
Apr 2022

Founder Contacts

30,000+ verified contacts

Brooklyn, United States

Green Project's all-in-one carbon management software leverages targeted API integrations with a company's existing data systems.

Apr 2023

Founder Contacts

30,000+ verified contacts

Bolton, United Kingdom

MeterZ provides energy data monitoring, allowing businesses to report on energy consumption and reduce carbon footprints.

$253K raised
Apr 2024

Founder Contacts

30,000+ verified contacts

Stony Brook, United States

StorEn Technologies strives to bring proprietary real innovation to Vanadium Flow Batteries.

$585K raised
Apr 2026

Founder Contacts

30,000+ verified contacts

Vancouver, Canada

Three Sixty Solar develops a commercial solar tower designed to provide a high-density clean energy solution.

$363K raised
Apr 2024

Founder Contacts

30,000+ verified contacts

Budapest, Hungary

Digital energy audit platform to generate white certificate for home owners

$500K raised
Apr 2024

Founder Contacts

30,000+ verified contacts

Worcester, United States

Embue is a cloud based platform for managing smart apartments and buildings.

$974K raised
Apr 2026

Founder Contacts

30,000+ verified contacts

Tokyo, Japan

Helical Fusion is a startup company that aims to commercialize fusion energy using magnetic confinement of high-temperature plasmas.

$16.9M raised
Apr 2026

Founder Contacts

30,000+ verified contacts

Naples, United States

IntriEnergy is a startup that provides high-efficiency PV cells.

$488K raised
Apr 2026

Founder Contacts

30,000+ verified contacts

Boston, United States

Modular and compact unit that provides renewable energy and clean water in remote areas.

$13K raised
Apr 2024

Founder Contacts

30,000+ verified contacts

Lisbon, Portugal

Manie is an energy consulting company that helps customers manage their energy needs and offers free comparison and switching services.

$1.1M raised
Apr 2025

Founder Contacts

30,000+ verified contacts

Honolulu, United States

Elemental is a non-profit investor focused on scaling climate solutions and social impact for all communities.

$577K raised
Apr 2026

Founder Contacts

30,000+ verified contacts

Sandwich, United States

Actual Energy offers a wide array of services aimed at using energy smarter.

$1.1M raised
Apr 2022

Founder Contacts

30,000+ verified contacts

Los Angeles, United States

Enervee is a B2B platform that drives energy-efficient consumer purchases at scale through utility partnerships and embedded financing.

$35.0M raised
Apr 2022

Founder Contacts

30,000+ verified contacts

Yarnton, United Kingdom

First Light Fusion is an energy company that focuses on researching energy generation by inertial confinement fusion.

$25.0M raised
Apr 2026

Founder Contacts

30,000+ verified contacts

Newark, United States

NovaSolix develops an energy technology designed to generate a clean and low-cost form of energy.

$3.9M raised
Apr 2026

Founder Contacts

30,000+ verified contacts

Denver, United States

Syrcuit Energy Solutions engages in providing energy solutions to commercial, industrial, municipal, and residential properties.

$6.0M raised
Apr 2022

Founder Contacts

30,000+ verified contacts

Ridgway, United States

ZGEO Energy develops geothermal plants, integrates thermal networks for mixed-use communities and supplies utility/industrial power.

$306K raised
Apr 2026

Founder Contacts

30,000+ verified contacts

Houston, United States

Fervo Energy develops and operates clean energy technology to generate carbon-free energy from geothermal systems.

$494K raised
Apr 2026

Founder Contacts

30,000+ verified contacts

Austin, United States

Arbor is an intelligent electricity marketplace that lowers energy costs for homes and businesses.

Apr 2024

Founder Contacts

30,000+ verified contacts

Champaign, United States

Improving the energy efficiency of commercial real estate.

$355K raised
Apr 2024

Founder Contacts

30,000+ verified contacts

London, United Kingdom

Skewb is a business consulting firm that provides digital transformation, workforce management, and energy efficiency services.

$7.8M raised
Apr 2024

Founder Contacts

30,000+ verified contacts

Dartmouth, Canada

Voltai harvests energy from motion to help marine industries reduce reliance on fossil fuels and stored energy.

$73K raised
Apr 2026

Founder Contacts

30,000+ verified contacts

Atlanta, United States

JTEC is a cutting-edge technology that converts a heat difference into useable power through electrochemical reactions.

$30.0M raised
Apr 2022

Founder Contacts

30,000+ verified contacts

Watertown, United States

Via Separations is a technology company that develops membrane materials for modular and resource separation solutions.

Apr 2026

Founder Contacts

30,000+ verified contacts

Showing 126 to 150 of 413 companies

About the Energy Efficiency Startup Ecosystem

The energy efficiency sector is an active area of startup innovation and venture capital investment. Companies in this space are developing new technologies, platforms, and services that address evolving market needs and create new business opportunities.

Funding Trends in Energy Efficiency

Energy Efficiency companies raise capital across various funding stages, from early seed rounds to late-stage growth financing. Investor interest in this sector is driven by the size of the addressable market, the pace of technology adoption, and the potential for scalable business models.

Growth Outlook

The energy efficiency sector is expected to continue evolving as technology advances, market dynamics shift, and new opportunities emerge. Companies that demonstrate strong product-market fit, efficient growth, and clear competitive advantages are well-positioned to attract continued investment.

Energy Efficiency Funding Breakdown

Here is how funding is distributed among the 413 energy efficiency companies tracked in the VCBacked database.

Average Funding
$5.3M
Total Funding Tracked
$132.1M
Countries Represented
6

Distribution by Funding Stage

Other25 companies

Top Cities for Energy Efficiency

1.Newark
2 companies$4.2M
2.Brooklyn
1 companiesUndisclosed
3.Bolton
1 companies$253K
4.Stony Brook
1 companies$585K
5.Vancouver
1 companies$363K

Related Industries

Companies in the energy efficiency sector often overlap with or complement businesses in adjacent industries. Exploring related verticals can help you discover additional companies, identify partnership opportunities, and understand the broader competitive landscape.

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413 Energy Efficiency Startups (2026) — Recently Funded Companies, Investors & Rounds | VCBacked