The top VC funds backing climate and green technology startups — from pre-seed to growth stage, with ticket sizes, geographic focus, and the sectors attracting the most capital right now.
Nearly 30% of green startups globally secured institutional funding in 2025, according to OECD data — a figure that has grown every year since 2020 despite the broader VC market contraction. The climate tech investment category has matured dramatically: early-stage solar and wind plays have given way to a second generation of climate companies attacking harder problems — industrial decarbonization, carbon removal, green hydrogen, climate intelligence, and sustainable materials. The investors backing these companies have evolved in parallel, from generalist ESG funds to highly specialized climate-native VCs with deep technical expertise and dedicated LP bases.
Table of Contents
- The State of GreenTech Investing in 2026
- Top Early-Stage GreenTech Investors Globally
- Top European Climate Tech Investors
- US-Based GreenTech Investors Active in 2026
- Corporate VCs and Strategic Investors in Climate
- Grant and Non-Dilutive Funding for GreenTech
- How to Position Your GreenTech Startup for Investment
- Frequently Asked Questions
The State of GreenTech Investing in 2026
GreenTech investment in 2025 was defined by a bifurcation: mega-rounds for proven infrastructure plays (grid technology, utility-scale storage, offshore wind) on one side, and a vibrant early-stage market for software-enabled climate solutions on the other. The middle — Series B companies that hadn’t yet proven unit economics at scale — experienced the tightest funding environment of any segment.
Three structural shifts are shaping where climate capital flows in 2026:
Defense of energy infrastructure has become a climate investment. The geopolitical environment has made energy independence a national security priority across NATO member states. Investments in grid resilience, domestic battery manufacturing, and alternative energy sourcing now attract both climate-focused and defense-adjacent capital — a convergence that Helsing investor Prima Materia was early to identify with its energy transition thesis.
AI-enabled climate solutions have become a distinct sub-category. Climate intelligence — using machine learning to optimize energy grids, model carbon removal pathways, predict extreme weather impacts on assets, and automate emissions reporting — attracted its own dedicated funding wave in 2025. Funds that previously defined themselves as “climate tech” investors are now explicitly adding “AI + climate” to their mandates.
Carbon markets are maturing from speculative to institutional. After the 2022–2023 credibility crisis in voluntary carbon markets, a new generation of verification-technology and measurement companies has rebuilt institutional confidence. Carbon credit quality has become an investable technology category, attracting dedicated capital from both climate funds and broader enterprise software investors.
Top Early-Stage GreenTech Investors Globally
| Fund | HQ | Stage | Ticket Size | Climate Focus | Website |
|---|---|---|---|---|---|
| Pale Blue Dot | Stockholm | Pre-Seed – Seed | €500K – €3M | All climate verticals | paleblue.vc |
| Climentum Capital | Copenhagen | Seed – Series A | €1M – €5M | Hardware, Deep Tech CO₂ | climentum.com |
| G-Force | London | Pre-Seed | €250K | Climate Tech (global impact) | g-force.vc |
| Climate VC | London | Pre-Seed – Seed | £25K – £350K | All climate verticals | climate.vc |
| Systemiq Capital | London | Seed – Series A/B | Multi-million € | Food, transport, climate intelligence | systemiq.earth |
| Contrarian Ventures | Vilnius | Seed – Series A | €500K – €3M | Energy, Mobility, Agri | cventures.vc |
| Norrsken VC | Stockholm | Seed – Series A | €1M – €5M | Impact, Climate, Health | norrsken.org |
| World Fund | Berlin | Seed – Series B | €1M – €20M | Climate potential tech | worldfund.vc |
| TenNine VC | Amsterdam | Seed – Series A | Up to $500K | Climate, Cleantech, Circular | tennine.vc |
| Inclimo Climate Tech | Barcelona | Early Stage | Undisclosed | Decarbonization, Article 9 | inclimo.com |
Pale Blue Dot is the most active early-stage climate-native fund in the Nordics, with a portfolio spanning carbon removal, sustainable food systems, and climate software. World Fund, headquartered in Berlin, has built one of Europe’s most visible climate theses around what it calls “climate potential” — quantifying the carbon reduction potential of each investment as a primary selection criterion.
Top European Climate Tech Investors
| Fund | HQ | Stage | Ticket Size | Notable Investments | Website |
|---|---|---|---|---|---|
| EQT Ventures | Stockholm | Series A – C | €5M – €50M | Climate, Deep Tech, SaaS | eqtventures.com |
| Planet First Partners | London | Series A+ | Multi-million € | Carbon removal, e-mobility, digital health | planetfirstpartners.com |
| Breakthrough Energy Ventures | London/Brussels | Series A – C | $10M – $100M | Hard climate tech globally | breakthroughenergy.org |
| Lowercarbon Capital | San Francisco (EU active) | Seed – Series B | $1M – $20M | All climate verticals | lowercarboncapital.com |
| Congruent Ventures | San Francisco (EU active) | Seed – Series B | $1M – $15M | Cleantech, Sustainable Ag | congruentvc.com |
| Extantia Capital | Hamburg | Seed – Series A | €500K – €5M | Deep Tech climate | extantia.com |
| OXO Greentech Fund | Europe | Seed – Series A | €500K – €5M | Agritech, Cleantech, Energy | oxo.fund |
| Grantham Foundation | London | All stages | Variable | Climate science + tech | granthamfoundation.org |
Breakthrough Energy Ventures — Bill Gates’s climate fund — remains one of the most influential capital allocators in hard climate tech globally, and has been actively deploying in European deep tech since opening its Brussels office. Its portfolio includes Form Energy, Malta, and other companies working on multi-day energy storage and industrial heat — the hardest decarbonization problems.
US-Based GreenTech Investors Active in 2026
Several major US funds have become consistently active in climate technology as a dedicated thesis, not just an opportunistic category:
Lowercarbon Capital (Chris Sacca) — One of the highest-profile dedicated climate funds globally. Backs aggressive climate technology bets across solar, carbon removal, nuclear, and sustainable protein. Known for sharp contrarian thesis writing and willingness to back technically ambitious companies that more conservative funds avoid.
Andreessen Horowitz (a16z) — American Dynamism — a16z’s American Dynamism fund explicitly targets climate infrastructure, energy, and industrial technology as part of its national competitiveness thesis. Not a pure climate fund, but one of the most active generalist VCs deploying into climate at scale.
Khosla Ventures — Vinod Khosla’s fund has a multi-decade history in clean energy and remains one of the most active investors in hard climate tech. Has backed multiple fusion energy companies alongside solar, storage, and sustainable materials plays.
Energy Impact Partners — A growth-stage climate fund with a unique model: its LP base includes major utilities, allowing portfolio companies to access both capital and commercial partnerships with energy infrastructure operators.
Union Square Ventures — USV has added climate as a core thesis category alongside its traditional internet and crypto focus, specifically targeting climate intelligence and marketplace models that accelerate the transition.
Corporate VCs and Strategic Investors in Climate
Corporate VCs are increasingly important in GreenTech because they offer what pure financial investors cannot: commercial partnerships, procurement commitments, and access to existing distribution infrastructure.
bp Ventures — BP’s CVC arm has deployed hundreds of millions into clean energy technology, EV charging, and energy software. Portfolio companies often get commercial pilot agreements alongside investment.
Siemens Energy Ventures — Backs industrial decarbonization technology that could integrate with Siemens Energy’s existing product portfolio. Particularly active in green hydrogen, grid digitization, and carbon capture.
Schneider Electric Ventures — Focused on energy efficiency and management software, building materials, and grid-edge technology. One of the most active European corporate VCs in climate.
Eni Next — ENI’s CVC invests in energy transition technology globally, with particular focus on biofuels, carbon capture, and fusion energy. Has backed Commonwealth Fusion Systems alongside leading financial VCs.
ENGIE New Ventures — The French energy giant’s CVC arm backs startups in renewable energy, energy storage, and smart grid technology, often creating commercial pilot programs for portfolio companies with ENGIE’s utility operations.
Grant and Non-Dilutive Funding for GreenTech
GreenTech is one of the few categories where meaningful non-dilutive capital is available alongside VC:
EU Innovation Fund — One of the largest non-dilutive climate funding programs globally, financed by EU carbon market revenues. Supports large-scale demonstration of innovative low-carbon technologies, with individual grants up to €100M+. Applications are competitive and require detailed technical and financial documentation.
Horizon Europe — The EU’s primary R&D funding program provides grants for early-stage climate R&D, with individual grants typically €1–10M for deep tech projects. The climate cluster within Horizon Europe specifically targets carbon removal, sustainable energy, and circular economy.
InnovateUK Net Zero — UK government funding for climate and clean energy innovation, accessible to UK-based companies at any stage. Particularly active in hydrogen, offshore wind technology, and building decarbonization.
US DOE Loan Programs Office — Following the Inflation Reduction Act, the US Department of Energy’s Loan Programs Office has become a major capital source for climate technology commercialization, with loan guarantees for projects that can’t yet access commercial capital.
ARPA-E — US government grants for high-risk, high-reward energy technology research. Not appropriate for commercial-stage companies but foundational for deep tech climate companies at the research stage.
When you’re building your investor outreach list for a GreenTech raise, the combination of sector specificity and stage fit is more important in climate than in almost any other category — a clean energy infrastructure fund won’t lead an agritech seed round regardless of how good your pitch is. Fundreef lets you filter 10,000+ active investors by climate sub-sector, check size, and recent investment activity to build a targeted list of funds that are actively deploying in exactly your space.
How to Position Your GreenTech Startup for Investment
Climate tech investors in 2026 have been pitched thousands of companies. The pitches that convert share specific characteristics:
Lead with the carbon math. Climate funds increasingly require a quantified emissions impact projection alongside financial projections. The question “how many tons of CO₂ does your company remove or prevent per dollar of capital deployed?” has become a standard diligence question. Have a credible, bottom-up answer with assumptions shown.
Separate climate dependency from climate motivation. The worst GreenTech pitches depend on carbon pricing or policy incentives to generate returns. The best ones have a financially sound business model that happens to be climate-positive. If your unit economics only work with aggressive carbon credit pricing or specific regulatory outcomes, sophisticated climate investors will flag the dependency.
Address the “valley of death” explicitly. Climate hardware companies face a well-known funding gap between R&D and commercial scale-up — the capital requirements are too large for most VCs and too early for infrastructure debt. Acknowledge this in your pitch and show your strategy for crossing it: government grants, strategic partnerships, or a phased capital deployment plan.
Show the policy tailwinds without depending on them. The IRA in the US, the Green Deal in Europe, and REPowerEU have created structural demand for climate technology that makes many markets more attractive than they would have been pre-policy. Reference these tailwinds, but show that your business model is sound even in a policy reversal scenario.
Suggested Visuals
- Graphic 1: European GreenTech investor map — funds plotted by stage and geography
- Graphic 2: Climate tech sub-sector funding comparison — relative capital deployment by category (energy, transport, food, carbon removal, climate intelligence) in 2025
- Graphic 3: Grant vs. equity funding pathways — decision tree for GreenTech founders choosing between dilutive and non-dilutive capital at each stage
Frequently Asked Questions About GreenTech Investing in 2026
What is the difference between climate tech and cleantech?
Cleantech (2006–2015) typically referred to hardware-intensive renewable energy and environmental technology — solar panels, wind turbines, water treatment. Climate tech is the broader, more current term that includes cleantech hardware plus software-enabled climate solutions (climate intelligence, carbon markets, ESG reporting), sustainable food and agriculture, and the application of AI to climate problems. The terms are often used interchangeably, but climate tech has largely displaced cleantech in investor vocabulary since 2018.
Are climate tech valuations lower than software valuations?
Generally yes, particularly for hardware-intensive climate companies. Software climate companies (climate intelligence, ESG platforms, carbon market infrastructure) trade at valuation multiples comparable to B2B SaaS. Hardware companies — energy storage, carbon removal technology, green hydrogen — typically trade at lower revenue multiples that reflect capital intensity and longer paths to profitability. The exception is breakthrough hardware companies in highly competitive categories (fusion energy, grid storage) that attract software-like valuations based on technology option value.
Is impact measurement required to raise from climate investors?
Most dedicated climate funds require it, and the sophistication of impact measurement frameworks has increased significantly. Beyond basic carbon accounting, leading climate funds now require lifecycle analysis of emissions impact, quantification of avoided versus removed emissions, and scenario analysis under different carbon pricing and policy assumptions. Companies that treat impact measurement as a compliance exercise rather than a core operating metric are increasingly disadvantaged in fundraising conversations with specialized climate VCs.
Which climate tech sectors attracted the most VC capital in 2025?
Energy storage and grid technology led by deal value, driven by the infrastructure buildout required to support renewable energy penetration at scale. AI-enabled climate solutions (climate intelligence, predictive grid management, emissions monitoring) led by deal count, reflecting the maturation of software-native climate companies. Sustainable food and agriculture was the third-largest category, with particularly strong activity in alternative proteins, precision fermentation, and soil carbon.
Can European GreenTech companies raise from US climate funds?
Yes — and increasingly so. Lowercarbon Capital, Breakthrough Energy Ventures, Khosla Ventures, and several other US-based climate funds have become active in European investments, particularly for deep tech companies working on problems (offshore wind, industrial hydrogen, sustainable aviation fuel) where European policy environments are ahead of the US. The key requirement is typically a credible path to global scale — US funds want to understand how a European market entry creates a foundation for US expansion, not a ceiling.
