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    Top Energy Efficiency Accelerators & VCs (2026)

    Browse energy efficiency startup programs and VCs with updated offers, deadlines, and funding for 2026.

    Updated Mar 2026

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    Found 28 investors & programs.

    Plug and Play logo

    Plug and Play

    Plug and Play is an innovation platform bringing together startups and large corporations.

    Plug and Play: Plug and Play is an innovation platform bringing together startups and large corporations.. Venture Capital Firm, Accelerator, Family Office, Corporate VC. Located in Sunnyvale, Ann Arbor, United States, North America, Europe, Asia, MENA, South America, Oceania, Africa. $50K - $1M available.
    Application open
    $50K - $1M
    Venture Capital Firm
    Accelerator
    Family Office
    Corporate VC
    Octopus Ventures logo

    Octopus Ventures

    Our skilled B2B Software team supports companies that are reshaping industries with digitisation and automation making life easier for customers everywhere.

    Octopus Ventures: Our skilled B2B Software team supports companies that are reshaping industries with digitisation and automation making life easier for customers everywhere.. Venture Capital Firm, Corporate VC, Investment Fund, Venture Capital. Located in London, UK, United Kingdom, Europe, North America, MENA, Oceania, Africa, West Europe.
    Venture Capital Firm
    Corporate VC
    Investment Fund
    Venture Capital
    InnoEnergy logo

    InnoEnergy

    Transitioning global energy Transforming every industry

    InnoEnergy: Transitioning global energy Transforming every industry. Investment Fund, Venture Capital Firm. Located in Eindhoven, New York, NY, Netherlands, United States, Europe, North America. $250K - $8M available.
    Application open
    $250K - $8M
    Investment Fund
    Venture Capital Firm
    Huron River Ventures logo

    Huron River Ventures

    We invest in early-stage companies in industries that drive the global economy — agriculture energy manufacturing and mobility.

    Huron River Ventures: We invest in early-stage companies in industries that drive the global economy — agriculture energy manufacturing and mobility.. Venture Capital Firm. Located in Ann Arbor, New York, NY, United States, North America. $1M available.
    Application open
    $1M
    Venture Capital Firm
    Lime Rock New Energy logo

    Lime Rock New Energy

    Since inception in 1998 100+ INVESTMENTS

    Lime Rock New Energy: Since inception in 1998 100+ INVESTMENTS. Venture Capital Firm. Located in San Diego, CA, United States, North America. $30M - $90M available.
    Application open
    $30M - $90M
    Venture Capital Firm
    Eurazeo logo

    Eurazeo

    Eurazeo, société d'investissement au service du développement des entreprises en Europe et dans le monde.

    Eurazeo: Eurazeo, société d'investissement au service du développement des entreprises en Europe et dans le monde.. Venture Capital Firm. Located in Paris, Singapore, Asia. $1M - $20M available.
    Application open
    $1M - $20M
    Venture Capital Firm
    The Impact Engine logo

    The Impact Engine

    Impact Engine is a venture capital and private equity firm investing in companies driving positive impact in economic empowerment education environmental sustainability and health.

    The Impact Engine: Impact Engine is a venture capital and private equity firm investing in companies driving positive impact in economic empowerment education environmental sustainability and health.. Venture Capital Firm, Micro VC, Private Equity Firm. Located in Chicago, United States, North America.
    Venture Capital Firm
    Micro VC
    Private Equity Firm
    Saudi Aramco Ventures - Wa'ed Ventures logo

    Saudi Aramco Ventures - Wa'ed Ventures

    Saudi Aramco Ventures - Wa'ed Ventures: Startup program. Corporate VC. Located in London. $500K - $20M available.
    Application open
    $500K - $20M
    Corporate VC
    National Grid Partners logo

    National Grid Partners

    Powering the things you love

    National Grid Partners: Powering the things you love. Corporate VC. Located in London, Los Gatos, United Kingdom, United States, North America. $5M - $7M available.
    Application open
    $5M - $7M
    Can Lead
    Corporate VC
    Capria Ventures logo

    Capria Ventures

    We are capria Ventures

    Capria Ventures: We are capria Ventures. Venture Capital Firm. Located in Argentina, South America. $500K - $2M available.
    Application open
    $500K - $2M
    Venture Capital Firm
    Ponooc logo

    Ponooc

    Ponooc continues as Move Energy

    Ponooc: Ponooc continues as Move Energy. Venture Capital Firm, Venture Capital. $500K - $5M available.
    Application open
    $500K - $5M
    Venture Capital Firm
    Venture Capital
    Great Wave Ventures logo

    Great Wave Ventures

    BUILDING COMMUNITY

    Great Wave Ventures: BUILDING COMMUNITY. Venture Capital Firm. Located in New York, NY. $250K - $2M available.
    Application open
    $250K - $2M
    Venture Capital Firm
    SURGE Ventures logo

    SURGE Ventures

    Partner with Surge Ventures the leading venture studio in RegTech ComplyTech and PrivacyTech. Transform your SaaS startup idea into a thriving business.

    SURGE Ventures: Partner with Surge Ventures the leading venture studio in RegTech ComplyTech and PrivacyTech. Transform your SaaS startup idea into a thriving business.. Venture Capital Firm. Located in Houston, United States, North America.
    Venture Capital Firm
    Purpose Capital Impact Fund logo

    Purpose Capital Impact Fund

    Generating meaningful impact and financial returns

    Purpose Capital Impact Fund: Generating meaningful impact and financial returns. Private Equity Firm. Located in Auckland, New Zealand, Other. $500K - $3M available.
    Application open
    $500K - $3M
    Private Equity Firm
    NXT: Commercial Innovation Programme logo

    NXT: Commercial Innovation Programme

    InsurTech Innovation & Growth through Collaboration 🚀🤝

    NXT: Commercial Innovation Programme: InsurTech Innovation & Growth through Collaboration 🚀🤝. Accelerator, Incubator, Entrepreneurship Program. Located in Munich, Germany, Europe, North America, MENA, Worldwide. Sessions with insurers available.
    Application open
    Sessions with insurers
    Accelerator
    Incubator
    Entrepreneurship Program
    LifeX Ventures logo

    LifeX Ventures

    Life Extension Ventures

    LifeX Ventures: Life Extension Ventures. Venture Capital Firm. Located in United States, North America. $150K - $5M available.
    Application open
    $150K - $5M
    Venture Capital Firm
    KIC INNOENERGY  logo

    KIC INNOENERGY

    Transitioning global energy Transforming every industry

    KIC INNOENERGY : Transitioning global energy Transforming every industry. Accelerator. Located in Paris, France, Europe. €200K - $500K available.
    Application open
    €200K - $500K
    Accelerator
    E44 Ventures  logo

    E44 Ventures

    Focused on Innovation Impacting Multiple Industries, for Generations to Come

    E44 Ventures : Focused on Innovation Impacting Multiple Industries, for Generations to Come. Venture Capital Firm. Located in Israel, MENA. $300K - $2M available.
    Application open
    $300K - $2M
    Venture Capital Firm
    Sabic Ventures
 logo

    Sabic Ventures

    SABIC VENTURES – HELPING INNOVATIVE COMPANIES

    Sabic Ventures : SABIC VENTURES – HELPING INNOVATIVE COMPANIES. Corporate VC. Located in Riyadh, Saudi Arabia, Europe, Middle East. $1M available.
    Application open
    $1M
    Can Lead
    Corporate VC
    Clima Now logo

    Clima Now

    Our Earth is our heritage. And our future.

    Clima Now: Our Earth is our heritage. And our future.. Venture Capital Firm, Foundation. Located in Zurich. $500K available.
    Application open
    $500K
    Venture Capital Firm
    Foundation
    Cleantech Business Angels logo

    Cleantech Business Angels

    Cleantech Business Angels, le réseau de Business Angels dédié à la transition écologique et énergétique

    Cleantech Business Angels: Cleantech Business Angels, le réseau de Business Angels dédié à la transition écologique et énergétique. Angel Investor. Located in Paris, France, Europe. $200K available.
    Application open
    $200K
    Angel Investor
    M8 Ventures logo

    M8 Ventures

    Great tech startup businesses are built by amazing product teams

    M8 Ventures: Great tech startup businesses are built by amazing product teams. Venture Capital Firm. Located in Madison, United States, North America.
    Venture Capital Firm
    Data Center Incubator logo

    Data Center Incubator

    Empowering Data Center startups to thrive. Enrich your skills, experiences & network by engaging with mentors,investors.

    Data Center Incubator: Empowering Data Center startups to thrive. Enrich your skills, experiences & network by engaging with mentors,investors.. Incubator, Accelerator, Mentorship Program. Located in Tel Aviv, Israel, MENA, Europe.
    Incubator
    Accelerator
    Mentorship Program
    Atland Ventures logo

    Atland Ventures

    Recognized By…

    Atland Ventures: Recognized By…. Venture Capital Firm. Located in Minneapolis, MN. €25K - $50K available.
    Application open
    €25K - $50K
    Venture Capital Firm
    Green Future Investments Ltd Fund logo

    Green Future Investments Ltd Fund

    Support to take innovations from benchtop to prototype or demonstrator scale.

    Green Future Investments Ltd Fund: Support to take innovations from benchtop to prototype or demonstrator scale.. Entrepreneurship Program, University Program, Accelerator, Startup Competition.
    Application open
    Entrepreneurship Program
    University Program
    Accelerator
    Startup Competition
    IBM Ventures logo

    IBM Ventures

    Steigern Sie die Produktivität mit KI-Agenten

    IBM Ventures: Steigern Sie die Produktivität mit KI-Agenten. Corporate VC. Located in New York, NY, Armonk, United States, North America.
    Can Lead
    Corporate VC
    Plug and Play Tech Center - Batch Program logo

    Plug and Play Tech Center - Batch Program

    Plug and Play is a seed and early-stage investor focused on great teams leading emerging growth comp…

    Plug and Play Tech Center - Batch Program: Plug and Play is a seed and early-stage investor focused on great teams leading emerging growth comp…. Accelerator, Venture Capital Firm, Co-working space, University Program, Venture Capital. Located in Sunnyvale, Ann Arbor, United States, United Kingdom, Germany, Japan, Canada, France, Israel, Singapore, Spain, Switzerland, Brazil, Italy, Netherlands, Australia, Indonesia, Sweden, Finland, Morocco, Belgium, India, Poland, Ireland, China, South Korea, Austria, United Arab Emirates, Denmark, Mexico, Chile, Hong Kong, Turkiye, Estonia, Portugal, Norway, New Zealand, Thailand, Latvia, Taiwan, South Africa, Russia, Colombia, Kenya, Czechia, Egypt, Nigeria, Ghana, Philippines, Argentina, Uganda, Greece, Iceland, Lithuania, Hungary, Luxembourg, Ukraine, Venezuela, Croatia, Saudi Arabia, Cameroon, Malaysia, Oman, Ecuador, Romania, Malta, Libya, Slovakia, Panama, Bulgaria, Anguilla, Guatemala, Myanmar, Tunisia, Peru, Trinidad and Tobago, Moldova, Cayman Islands, Costa Rica, Pakistan, El Salvador, Global, Emerging Markets, LatAm, EMEA, North America, Europe, Asia, MENA, South America, Oceania, Africa. Apply by Application closed. $50K - $1M available.
    $50K - $1M
    Can Lead
    Accelerator
    Venture Capital Firm
    Co-working space
    University Program
    Venture Capital
    Venture Fellows Program logo

    Venture Fellows Program

    Do you have an idea to make your community more resilient, equitable, & sustainable? The Venture Fellows program is a 9-month hands-on experience – we invest in diverse innovators to pilot good ideas that help communities become more resilient in response to the impacts of climate change.

    Venture Fellows Program: Do you have an idea to make your community more resilient, equitable, & sustainable? The Venture Fellows program is a 9-month hands-on experience – we invest in diverse innovators to pilot good ideas that help communities become more resilient in response to the impacts of climate change.. Accelerator. Located in Los Angeles, CA, Miami, United States, North America.
    Application open
    Accelerator

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    FAQs about Energy Efficiency funding

    Best Energy Efficiency accelerators/VCs in 2026?

    See the curated list below; filter by open deadlines and offer terms.

    Which programs are open right now?

    Check the “Open now” section for future deadlines and active cohorts.

    What are typical funding/equity terms?

    Offers vary by program; see each card for check size, equity, or equity-free notes.

    Are there remote options?

    Many programs support remote; confirm on each card’s details (remote flag or location).