Ecosystem Integrity Fund
Ecosystem Integrity Fund (EIF) is a San Francisco climate-tech venture capital firm founded in 2010. In June 2025 it closed its fifth fund at $225 million. EIF backs early growth-stage companies across clean energy, transport and agriculture, and in water it has funded two water companies, in flood-risk data and PFAS cleanup.
Compiled by Antoine Walter, (don't) Waste Water, from official filings and direct intelligence in Leviathan.
The take
Ecosystem Integrity Fund has been writing cheques into environmental sustainability since 2010, which makes it one of the grey-beards of climate venture, investing through two full hype cycles before "climate tech" became a crowded label. In June 2025 the firm closed its fifth fund at $225 million, landing below a $300 million target but a genuine result in a brutal fundraising market.
Ecosystem Integrity Fund was built by people who came to sustainability the long way round. Managing Partners James Everett, a Yale-trained forester, and Devin Whatley, a Wharton MBA and CFA charterholder, founded EIF in 2010 with partners Geoff Eisenberg and Sasha Brown, several of them out of the earlier Aquillian Investments. The thesis they wrote then still runs the fund: that the shift to a sustainable economy is not a trend but the next phase of the Industrial Revolution, and that backing it can pay.
Ecosystem Integrity Fund is a generalist climate investor, not a water house, and for a water reader its water bets read exactly that way. EIF's two water companies sit where water meets climate risk and pollution: Floodbase, a satellite flood-risk data platform powering a new kind of flood insurance, and Claros Technologies, which destroys PFAS "forever chemicals". Senior Partner Sasha Brown sits on both boards, which is as close as EIF has to a water lead.
Ecosystem Integrity Fund is the clearest example I track of a broad climate fund that touches water sideways, through resilience and clean chemistry rather than pipes and pumps. With a fresh $225 million in Fund V to deploy, the question worth watching is whether water stays a slice or grows into a theme for a firm that has spent fifteen years arguing sustainability can return capital.
Water Commitment Score
Compiled from official filings, third-party records, and direct intelligence from investors and founders, in Leviathan · recomputed monthly · as of Jun 2026.
How they invest
Portfolio · 2 water companies
Invests alongside
Highlighted = profiled on (don't) Waste Water.
Frequently asked
- What does Ecosystem Integrity Fund invest in?
- Ecosystem Integrity Fund backs early growth-stage companies advancing environmental sustainability, spanning clean energy, electric transport, distributed power, sustainable agriculture, green chemistry and resource efficiency. Its water exposure is two companies: Floodbase, in satellite flood-risk data, and Claros Technologies, in PFAS removal. Water sits as one slice of a broad climate portfolio.
- Who runs Ecosystem Integrity Fund?
- Ecosystem Integrity Fund is led by Managing Partners James Everett and Devin Whatley, with Senior Partners Geoff Eisenberg and Sasha Novograd Brown. Founded in 2010 and based in San Francisco, the firm carries decades of sustainability experience, and Sasha Brown sits on the boards of its water companies, Floodbase and Claros Technologies.
- How big is the Ecosystem Integrity Fund?
- Ecosystem Integrity Fund closed its fifth fund at $225 million in June 2025, short of a $300 million target. The firm has invested in environmental sustainability since 2010, which makes it one of the longer-running climate venture managers rather than a recent entrant to the space.
- Where is Ecosystem Integrity Fund based?
- Ecosystem Integrity Fund is headquartered in San Francisco, California. Founded in 2010, the firm invests across the United States in early growth-stage companies contributing to environmental sustainability, from clean energy and transport to water-related businesses in flood-risk data and PFAS cleanup.
- Is Ecosystem Integrity Fund a water fund?
- Ecosystem Integrity Fund is a generalist climate and sustainability venture firm. Despite a name that sounds environmental, it is not a dedicated water fund: water is one slice of its book, two companies as of 2026, Floodbase in flood-risk data and Claros Technologies in PFAS removal, beside its clean-energy and agriculture bets.