Top 15 Sustainability Investors in 2026 (Still Deploying Capital)

Founder at Peony — building AI-powered data rooms for secure deal workflows.
Connect with me on LinkedIn! I want to help you :)Last updated: March 2026
I've been running data rooms for climate tech startups through Peony for two years, and the pattern is consistent: founders pitch 40 "sustainability investors" and hear back from five — because most of those firms quietly stopped leading rounds after 2022.
That tracks. Sustainability investing — venture capital and growth equity deployed into companies tackling decarbonization, clean energy, circular economy, and environmental impact — went through a sharp correction alongside the broader climate tech market. The era of writing checks based on mission statements and TAM slides is over. But the correction also separated the committed investors from the boom-era tourists.
The 15 on this list kept deploying. These are the funds that closed new vehicles, led rounds, and scaled portfolio companies through the downturn. I spent the last quarter tracking every publicly reported sustainability deal, fund close, and exit from 2024 through early 2026 to build this list. Sustainability investors are more operationally demanding than software VCs — they want your cost curve, your LCA data, your pilot traction with named counterparties, and your regulatory pathway before they care about your addressable market. That scrutiny is a feature. The investors who commit through a correction tend to add real value beyond the check.
TL;DR: Sustainability mega-funds are flush — EIP closed $1.36B, Brookfield raised $20B for BGTF II, TPG Rise Climate is actively deploying at PE scale. But seed-stage climate deals remain tight and unit economics matter more than ever. Congruent Ventures ($275M Fund III), Lowercarbon Capital, and Clean Energy Ventures ($305M Fund II) anchor the early stage. If you're raising: organize your cost curves and LCA data in a Peony data room (free, $0), lead with cost parity math — not mission — and pitch 15-25 firms, not 150.
Quick comparison: 15 sustainability investors at a glance
| Investor | Check Size | Stage | Geography | 2025-2026 Highlight |
|---|---|---|---|---|
| Breakthrough Energy Ventures | $5M-$50M+ | Seed to Growth | Global | SAF coalition fund with oneworld airlines |
| Energy Impact Partners | $5M-$50M+ | Seed to Growth | North America, Europe | Flagship Fund III closed at $1.36B |
| TPG Rise Climate | $50M-$500M+ | Growth / PE | Global | Altus Power take-private; Kinetic e-bus stake |
| Brookfield BGTF II | $100M+ | Growth / Infra | Global | $20B Fund II for clean power and carbon capture |
| Just Climate | $25M-$100M+ | Late Venture to Growth | Global | $175M secured with CalSTRS and Microsoft |
| Lowercarbon Capital | $500K-$10M | Pre-Seed to Series A | Global | Cloover $114M seed; Mombak Series A (2025) |
| Congruent Ventures | $500K-$10M | Pre-Seed to Series A | North America | Fund III $275M; over $1B AUM |
| Clean Energy Ventures | $1M-$10M | Seed to Series A | North America | Closed $305M Fund II (2024) |
| S2G Ventures | $1M-$100M+ | Seed to Growth | North America | Spun off as independent adviser; $2.5B AUM |
| Prelude Ventures | $2M-$20M | Seed to Growth | North America | Portfolio includes Fervo, Form, Terabase |
| Systemiq Capital | $2M-$10M | Seed to Series A | Europe, Global | Fund II first close $70M (targeting $200M) |
| Fifth Wall Climate Tech | $5M-$30M | Early to Growth | North America, Europe | $500M climate fund; real estate LP base |
| Galvanize Climate Solutions | $5M-$50M+ | Venture to Growth | North America | Dedicated Venture and Growth strategy |
| Amazon Climate Pledge Fund | $5M-$50M+ | Early to Growth | Global | $2B program; X-energy SMR collaboration |
| Elemental Impact | $500K-$5M | Early / Deployment | North America | 160+ companies; $11.5B follow-on catalyzed |
How I built this table: Check sizes from publicly reported deal data and fund disclosures. Stage focus from stated mandates and actual portfolio patterns. Highlights verified from press releases, industry publications, and investor websites within the last 90 days.
Sustainability investment by the numbers
- $1.36 billion — Energy Impact Partners' Flagship Fund III close, the largest utility-backed climate fund (Business Wire)
- $20 billion — Brookfield Global Transition Fund II, one of the world's largest transition investment vehicles (Brookfield)
- $305 million — Clean Energy Ventures Fund II, closed 2024, focused on physics-driven climate tech (Clean Energy Ventures)
- $275 million — Congruent Ventures Fund III, pushing total AUM past $1B for one of the most active early-stage climate funds (Congruent Ventures)
- $175 million — Just Climate's Natural Climate Solutions strategy secured with CalSTRS and Microsoft's Climate Innovation Fund as anchors (Just Climate)
- 160+ — companies in Elemental Impact's portfolio, catalyzing $11.5B in follow-on capital for first-of-a-kind climate deployments (Elemental Impact)
- ~40% — share of global emissions from building operations, the market Fifth Wall's $500M climate fund targets (Fifth Wall)

The 15 investors (detailed profiles)
1. Breakthrough Energy Ventures (BEV)
Website | Coalition capital | Check size: $5M-$50M+ | Seed to Growth | Global
Best for: Deep-tech decarbonization teams translating lab-grade science into commercial pilots — especially across hard-to-abate sectors where tech can cut 1% or more of global GHG emissions.
Founded by Bill Gates, BEV invests across the five hardest sectors for decarbonization: electricity, transportation, manufacturing, agriculture, and buildings. Their model is distinctive — they build coalitions to commercialize critical technologies rather than just writing checks. In 2025, BEV launched a Sustainable Aviation Fuel investment fund with oneworld alliance airlines (American, British Airways, Cathay Pacific, and others) to advance and commercialize SAF technologies. Their discover-develop-deploy thesis means they stay involved from early science through commercial scale-up, often convening utility, airline, and heavy industry partners alongside portfolio companies. (Breakthrough Energy; American Airlines Newsroom)
What they look for: Physics plus unit economics at scale. Bring a cost-down roadmap showing your path to parity with incumbents, a named pilot/offtake pipeline, and coalition leverage — which utilities, manufacturers, or buyers would accelerate your deployment.
Recent activity: SAF coalition fund with oneworld airlines (2025), continued portfolio support across deep-tech climate.
2. Energy Impact Partners (EIP)
Website | $1.36B Flagship Fund III | Check size: $5M-$50M+ | Seed to Growth | North America, Europe
Best for: Climate tech companies that need utility introductions, grid pilots, and scaling B2B energy SaaS or hardware — EIP's LP base includes major utilities and industrial energy buyers.
EIP is the dominant utility-backed climate venture platform. Flagship Fund III closed at $1.36B in October 2025, making it one of the largest climate-focused venture funds ever raised. Their investor base includes utilities and large energy buyers, which means portfolio companies get direct access to pilot opportunities, procurement processes, and regulatory insight that purely financial VCs cannot offer. EIP invests across power generation, grid infrastructure, efficiency, electrification, and industrial decarbonization. The corporate LP coalition is the key differentiator — when an EIP portfolio company needs a utility pilot, the introductions are warm. (Business Wire; Energy Impact Partners)
What they look for: Quantified customer ROI and a realistic utility/industrial pilot plan. Show payback for energy buyers, reliability data, regulatory fit, and how you'd leverage specific LPs from EIP's utility coalition.
Recent deals: Flagship Fund III $1.36B close (Oct 2025), active portfolio support and new investments.
3. TPG Rise Climate
Website | Multi-billion-dollar platform | Check size: $50M-$500M+ | Growth / PE | Global
Best for: Scaling plants, fleets, and asset-heavy businesses where speed and execution certainty matter — TPG brings PE-scale capital with climate conviction.
TPG Rise Climate is a multi-strategy climate platform doing large PE transactions, transition infrastructure, and Global South initiatives. In 2025, they took solar company Altus Power private for $2.2B and acquired a stake in Kinetic, an electric bus platform. This is growth and PE-scale capital — ideal for venture-backed companies that have proven the technology and now need hundreds of millions to build capacity. TPG's broader infrastructure and operating capabilities mean they can help with supply chain, construction, and project finance in ways that venture funds cannot. (Reuters; TPG)
What they look for: Cash-flow durability, contracted revenues, capex intensity, and supply-chain resilience. Bring a capacity-build plan (MW or tonnes), signed counterparties, and sensitivity cases showing downside protection.
Recent deals: Altus Power take-private $2.2B (2025), Kinetic e-bus platform stake (2025).
4. Brookfield Global Transition Fund (BGTF II)
Website | $20B Fund II | Check size: $100M+ | Growth / Infrastructure | Global
Best for: Fleet rollouts, gigawatt-scale clean power, large carbon capture facilities, and transition infrastructure where massive capital deployment and execution speed matter.
Brookfield raised $20B for BGTF II — one of the world's largest transition investment funds. This is infrastructure-scale capital for companies at or beyond the commercialization stage. Brookfield partners well with venture-backed companies that have proven their technology at pilot scale and are ready to build their first full-scale facility or fleet. Their operating capabilities span project development, construction, and asset management across clean power, carbon capture, and related infrastructure.
What they look for: Contracted revenues, capex intensity modeling, supply chain resilience, and a capacity-build plan with named counterparties. This is not venture capital — bring sensitivities, construction timelines, and evidence of bankability.
Recent activity: Continued deployment from $20B BGTF II across clean power and transition infrastructure.
5. Just Climate (Generation Investment Management)
Website | $175M NCS strategy | Check size: $25M-$100M+ | Late Venture to Growth | Global
Best for: Industrial decarbonization and nature-based solutions with credible additionality — especially teams targeting the "highest-emitting, most off-track sectors."
Just Climate, created by Generation Investment Management (co-founded by Al Gore), focuses on sectors where emissions are largest and progress is slowest. In 2025, they secured $175M for their Natural Climate Solutions strategy, anchored by CalSTRS (one of the world's largest pension funds) and Microsoft's Climate Innovation Fund. They also launched a regional Latin America strategy, signaling expansion beyond core markets. The NCS strategy targets permanence, verification, and real-world additionality — not just carbon credit speculation. (Just Climate; New Private Markets)
What they look for: Additionality, permanence, and economics under conservative assumptions. Bring third-party verification plans, contracted offtakes or procurement commitments, and robust downside cases.
Recent deals: $175M NCS strategy close (2025), LatAm regional vehicle launch (2025).
6. Lowercarbon Capital
Website | Multi-fund | Check size: $500K-$10M | Pre-Seed to Series A | Global
Best for: Fast, scrappy technical teams with a sharp distribution wedge — especially in carbon removal, fusion, batteries, low-carbon materials, and storage.
Lowercarbon continues to be one of the most active early-stage climate investors globally. They led Cloover's $114M seed round in 2024 and participated in Mombak's Series A in 2025. Their thesis is pragmatic: real-world unit economics, speed to deployment, and measurable CO2 impact. They back teams that can show cost today versus cost post-raise, with the first three paying deployments and clear reasons those customers stick. Lowercarbon's brand also carries signal — their portfolio companies tend to attract follow-on capital from larger climate funds. (Reuters; Lowercarbon Capital)
What they look for: One slide on cost/quality versus the incumbent, plus the first three paying deployments. Keep it blunt: cost today, cost post-raise, and the engineering levers that drive the improvement.
Recent deals: Cloover $114M seed (2024), Mombak Series A participation (2025).
7. Congruent Ventures
Website | $275M Fund III, over $1B AUM | Check size: $500K-$10M | Pre-Seed to Series A | North America
Best for: First institutional checks for climate tech founders — mobility, energy, food/ag, and sustainable production — who need hands-on help with go-to-market and follow-on strategy.
Congruent is one of the most active pure-play early-stage climate funds. Fund III closed at $275M, pushing total AUM past $1B. They also raised a continuity vehicle for scaling winners, which means they can follow on through growth stages rather than handing off to a different investor. Founded by Josh Posamentier and Abe Yokell, Congruent's model is built around being the first institutional investor and then helping companies reach their next funding milestone. (Congruent Ventures; Axios)
What they look for: Team speed, validation data, and a credible path to gross margin. Show hard traction — pilots, LOIs, or paying customers — and a "capital-to-proofs" plan for the next 12-18 months.
Recent activity: Active Fund III deployment, continuity vehicle for growth-stage follow-ons.

8. Clean Energy Ventures (CEV)
Website | $305M Fund II | Check size: $1M-$10M | Seed to Series A | North America
Best for: Early hardware and process companies with clear abatement math — physics-driven, engineering-intensive climate tech at the earliest institutional stage.
CEV closed $305M Fund II in 2024, making them one of the largest dedicated seed/Series A climate tech funds. Their diligence is deeply technical — the team includes engineers and scientists who evaluate technologies on physics fundamentals, not just market narratives. CEV often writes the first institutional check and provides direct operator support for technical milestones. Their focus areas span clean energy generation, storage, grid, transportation, industry, buildings, and agriculture. (Clean Energy Ventures)
What they look for: The cost curve — today's unit cost versus post-raise target — with specific engineering levers. Titer/rate/yield data where relevant, balance-of-system costs, bankability indicators, and certification timelines. Lead with the physics.
Recent activity: Continued Fund II deployment across clean energy and industrial decarbonization.
9. S2G Ventures (Builders Vision)
Website | $2.5B+ AUM | Check size: $1M-$100M+ | Seed to Growth | North America
Best for: Value-chain plays in food systems, oceans, and energy transition — founders building structural changes in sustainability, not niche products.
S2G rebranded from S2G Ventures and spun off from Lukas Walton's Builders Vision as an independent SEC-registered adviser in May 2024. Now managing over $2.5B across 131 portfolio companies. They invest "at the seams" where food, oceans, and energy transition converge. S2G's active platform initiatives mean portfolio companies get access to corporate pilot introductions, policy groups, and market-making relationships beyond the check. (S2G Investments)
What they look for: System-level leverage, not point solutions. Category logic (retail, CPG, maritime, or utility partners) plus a named pilot calendar. LCA rigor and offtake credibility — show how your company bends an entire value chain.
Recent activity: Mealogic $16M (Jun 2025), Mara Renewables $9.1M (Aug 2025), active new fund raise.
10. Prelude Ventures
Website | Multi-fund | Check size: $2M-$20M | Seed to Growth | North America
Best for: Technically credible climate teams that need patient capital matching science to markets — built environment, carbon management, energy, and agriculture.
Prelude's thesis is "climate is everything" — they invest across the full climate spectrum with a long-term orientation. Their portfolio includes category-defining companies like Fervo Energy (geothermal), Form Energy (iron-air batteries), and Terabase Energy (solar manufacturing automation). Prelude is a long-term climate specialist, not a market-timer, which matters for deep-tech companies where the path from lab to commercial deployment spans years. (Prelude Ventures)
What they look for: Spec compliance, scale economics at 10-100x your current volume, and route-to-market realism. Put your spec sheet, QA/validation plan, and the first two distribution channels on slide two.
Recent activity: Continued support for Fervo, Form, Terabase, and active new investments.
11. Systemiq Capital
Website | Fund II targeting $200M | Check size: $2M-$10M | Seed to Series A | Europe, Global
Best for: Europe-leaning teams building data/AI-meets-industry solutions — early climate tech with system-level leverage across energy, industry, and nature.
Systemiq Capital is a pure-play climate venture fund. Fund II hit a first close at $70M with a target of $200M for early-stage climate tech investments across energy, industry, and nature-based solutions. Their approach emphasizes system-level thinking — they look for companies that can reshape entire value chains, not just optimize a single point. The Systemiq advisory practice (separate from the fund) gives the investment team deep sectoral knowledge across materials, energy, and land use systems. (Systemiq)
What they look for: System-level leverage and value chain transformation. Frame how your company bends an entire sector — policy, incumbents, infrastructure — not only the product spec. Data and AI applications to industrial problems are a current sweet spot.
Recent activity: Fund II deployment, targeting $200M total raise.
12. Fifth Wall Climate Tech
Website | $500M climate fund | Check size: $5M-$30M | Early to Growth | North America, Europe
Best for: Proptech-climate companies — smart buildings, advanced materials, HVAC, onsite generation and storage — that can deploy across large real estate portfolios.
Fifth Wall raised a dedicated $500M climate fund targeting decarbonization of the built environment, which accounts for roughly 40% of global emissions. Their key differentiator is the LP base: major real estate owners and operators who provide direct deployment opportunities for portfolio companies. When a Fifth Wall investment needs to pilot across 500 buildings, the LP base provides those sites. This is strategic capital for companies where adoption depends on property owner buy-in. (Fifth Wall)
What they look for: Portfolio roll-out math: per-building ROI, payback period, maintenance burden, and measurable abatement. Show deployment speed across large portfolios, installation cost economics, and which LPs are ready to pilot.
Recent activity: Active deployment from $500M climate fund across built environment decarbonization.
13. Galvanize Climate Solutions
Website | Multi-asset platform | Check size: $5M-$50M+ | Venture to Growth | North America
Best for: Companies needing both scaling capital and market-making relationships — founded by Tom Steyer and Katie Hall with dedicated venture and growth strategies.
Galvanize is a multi-asset climate platform with a dedicated Venture and Growth strategy for essential decarbonization companies. Founded by Tom Steyer (political influence and climate policy expertise) and Katie Hall, the platform pairs capital with policy access and operating expertise that few pure-play VCs can match. Their investment approach emphasizes material climate impact, durable demand, and a clear path to category leadership. (Galvanize)
What they look for: Material climate impact, durability of demand, and path to category leadership. Map milestones to both emissions impact and commercial inflections. Galvanize values companies where climate impact and financial returns are tightly coupled.
Recent activity: Continued deployment across venture and growth strategies.
14. Amazon — The Climate Pledge Fund
Website | $2B program | Check size: $5M-$50M+ | Early to Growth | Global
Best for: Supply chain, logistics, materials, circularity, and low-carbon power companies that can demonstrate the ability to decarbonize at enterprise scale — with Amazon as a potential strategic pilot partner.
Amazon's $2B corporate venture program accelerates decarbonization solutions tied to the company's 2040 net-zero goal. The strategic value is clear: Amazon operates one of the world's largest logistics networks, and portfolio companies can potentially pilot within Amazon's supply chain, fulfillment centers, and transportation fleet. The X-energy collaboration for small modular reactor power is one example of the scale they target. Active portfolio investments span multiple sectors with ongoing 2024-2025 deal flow. (Amazon)
What they look for: Ability to decarbonize at Amazon's operational scale — cost, reliability, and integration readiness. Pitch pilot SKUs or sites and a credible path from pilot to enterprise-wide rollout.
Recent activity: X-energy SMR collaboration, continued portfolio investments across supply chain and power.
15. Elemental Impact (formerly Elemental Excelerator)
Website | Catalytic capital | Check size: $500K-$5M | Early / Deployment | North America
Best for: First-of-a-kind climate demonstrations and community-embedded deployments — especially teams navigating the "valley of death" between lab proof and commercial scale.
Elemental Impact is a nonprofit investor providing catalytic capital and deployment support to close the gap between proven technology and commercial-scale operation. Their portfolio includes over 160 companies that have collectively catalyzed $11.5B in follow-on funding. Elemental Impact invests alongside project finance and operates at the deployment stage — they help companies with permitting, interconnection, insurance, community engagement, and the operational realities that purely financial investors overlook. Their model is built to close the "scale gap" that kills promising climate technologies. (Elemental Impact)
What they look for: Real-world deployment risk: permitting status, interconnection queue position, insurance, EPC plans, revenue contracts, and community benefit. Bring a project plan with hosts, permits, and a timeline — not just a technology pitch.
Recent activity: Continued catalytic capital deployment for FOAK climate projects.
How to pitch sustainability investors (5 things that move the needle)
1. Lead with your cost curve. One slide: today's cost per unit ($/kWh, $/tonne, $/MW) next to your post-round target, with the exact engineering levers — yield, throughput, capex per unit, energy cost, labor. Sustainability investors can smell hand-wavy economics from across the table.
2. Name your counterparties. Pilots, hosts, utilities, offtakers — with timeline and spec/QA criteria. "Intent" is fine; LOIs are better; signed contracts are best. Soft commitments (MOUs, preferred-supplier status) still de-risk the story materially.
3. Make policy and regulatory risk explicit. Show interconnection status, permitting path, standards compliance, and contingencies. If your deployment crosses utility territory, zoning requirements, or federal incentive programs, spell out exactly where you stand and what comes next.
4. Quantify abatement, not just adoption. Tie your market size to tCO2e avoided and show how each deployment tranche moves emissions in your category. Sustainability investors evaluate impact alongside returns — give them the math.
5. Keep your data room boring (a compliment). Clean index, LCA summary, validation reports, IP/FTO map, vendor letters, unit-level economics, and a milestone-indexed use of proceeds. Use Peony to organize your startup data room and track investor engagement — know which investors actually reviewed your technical documentation before scheduling follow-ups.
Why your data room matters in sustainability fundraising
Sustainability investors review more complex documentation than most sectors — LCA reports, cost-of-goods models, pilot site data, regulatory filings, offtake agreements, IP portfolios, and engineering validation reports. A disorganized Google Drive folder signals operational immaturity before the first meeting.
Peony (free, $0) helps climate tech founders organize fundraising materials in a professional data room that investors take seriously. Upload your cost curves, LCA summaries, pilot data, and regulatory documents — Peony's AI-powered organization structures everything automatically. Page-level analytics show which investors spent time on your engineering validation versus your market sizing, helping you tailor follow-up conversations. Dynamic watermarking protects sensitive IP and cost data, and instant access revocation means you control who sees your materials at all times.

Peony is purpose-built for venture capital workflows — from seed rounds to growth equity. At $0 to start and $40/user/month for teams — 93-99% cheaper than legacy data rooms charging $5,000-$20,000 per deal.
Set up your sustainability data room — takes under two minutes.
Bottom line
The sustainability correction separated committed investors from boom-era tourists. The 15 on this list kept deploying through it — new funds closed, rounds led, portfolio companies scaled.
- Raising seed or pre-seed? Lowercarbon Capital, Congruent Ventures, Clean Energy Ventures, Systemiq Capital, Elemental Impact
- Series A or B? EIP, BEV, Prelude Ventures, S2G Ventures, Fifth Wall
- Growth or infrastructure? TPG Rise Climate, Brookfield BGTF II, Just Climate, Galvanize
- Built environment? Fifth Wall
- Corporate strategic? Amazon Climate Pledge Fund
- Nature-based solutions? Just Climate, S2G Ventures
- Hard-to-abate / deep tech? BEV, Clean Energy Ventures
Organize your cost curves, LCA data, and pilot documentation in a Peony data room (free, $0) before you start outreach — page-level analytics show you who's genuinely interested, and secure sharing protects your sensitive climate tech IP throughout the fundraising process.
FAQ
Who are the most active sustainability and impact investors in 2026?
The most active sustainability investors in 2026 include Energy Impact Partners (Flagship Fund III at $1.36B), Breakthrough Energy Ventures (coalition capital across hard-to-abate sectors), TPG Rise Climate (multi-billion-dollar transition platform), Congruent Ventures ($275M Fund III, over $1B AUM), and Clean Energy Ventures ($305M Fund II). When pitching these firms, organize your cost curves and pilot data in a Peony data room (free, $0) — page-level analytics show which documents investors spent the most time on.
How much do sustainability and climate tech VCs typically invest per deal?
Check sizes range from $150K at catalytic/deployment stage (Elemental Impact) to multi-billion-dollar infrastructure plays (Brookfield BGTF II, TPG Rise Climate). Seed-stage climate VCs typically invest $500K to $5M, Series A rounds see $5M to $25M, and growth rounds can reach $100M or more. Track investor engagement with Peony (free, $0) — page-level analytics show who opened your pitch deck and which sections they reviewed.
What do sustainability investors look for in a startup pitch in 2026?
Sustainability investors prioritize cost curves over mission statements — unit economics at scale, pilot traction with named counterparties, LCA rigor, and regulatory readiness. They want your path to cost parity with incumbents, contracted offtake or procurement intent, and a credible manufacturing scale-up plan. Organize your LCA summaries, pilot results, and cost-down roadmaps in a Peony data room (free, $0) — page-level analytics show which sections investors scrutinize most, helping you tailor follow-up conversations.
Is sustainability and climate tech funding recovering in 2026?
Selectively. Global climate tech funding has stabilized after the correction, with mega-funds deploying aggressively — EIP closed $1.36B, Brookfield raised $20B for BGTF II, and TPG Rise Climate is actively taking companies private. However, seed-stage climate deals remain tight, and investors demand stronger unit economics than during the 2021-2022 boom. Founders raising during this period should present disciplined fundamentals — Peony (free, $0) helps organize technical documentation and pilot data in a professional data room that signals operational maturity.
What is the difference between sustainability investors and climate tech investors?
Sustainability investors take a broad mandate covering ESG, social impact, circular economy, nature-based solutions, and environmental justice alongside decarbonization. Climate tech investors focus specifically on technologies that reduce greenhouse gas emissions — clean energy, carbon removal, grid infrastructure, and industrial decarbonization. In practice, the categories overlap significantly. This guide covers all 15 active investors across the full sustainability and climate tech spectrum. Peony (free, $0) supports both types of fundraising with secure data rooms, page-level analytics, and AI-powered document organization.
How do I share sensitive clean tech IP and cost data with investors securely?
Sustainability startups often need to share proprietary manufacturing processes, cost curves, LCA data, and patent filings during fundraising. Peony (free, $0) provides enterprise-grade security with identity-bound access, dynamic watermarking, and screenshot protection. Link expiry and instant access revocation ensure you control who sees your sensitive IP throughout the fundraising process — critical when sharing cost-of-goods data or pilot results with multiple investors simultaneously.
Which sustainability investors focus on early-stage seed and pre-seed startups?
The most active early-stage sustainability investors include Lowercarbon Capital (pre-seed to Series A, led Cloover's $114M seed), Congruent Ventures ($275M Fund III, one of the most active early climate funds), Clean Energy Ventures ($305M Fund II, physics-driven Seed/A investing), Systemiq Capital ($70M first close targeting $200M), and Elemental Impact (catalytic capital for first-of-a-kind deployments). Organize your early-stage cost curves and validation data in a Peony data room (free, $0) — page-level analytics help identify the most engaged investors.
Are corporate sustainability CVCs worth pitching in 2026?
Yes — corporate sustainability CVCs like Amazon's Climate Pledge Fund ($2B program) remain active and offer strategic advantages that pure financial VCs cannot: pilot sites, supply chain access, procurement commitments, and enterprise-scale deployment opportunities. Amazon's program spans supply chain, logistics, materials, and low-carbon power. The key advantage is moving from proof-of-concept to enterprise rollout with a built-in first customer. Present your corporate-ready materials in a Peony data room (free, $0) — page-level analytics show which sections corporate investors review most.
