The Ecosystem Integrity Fund

The Ecosystem Integrity Fund is a private equity and venture capital firm based in San Francisco, with offices in Los Angeles and New York, that targets early- to late-stage investments in environmental sustainability and climate-related sectors. It backs companies and projects in clean technologies, energy, transportation, water, agriculture, building materials, waste management, habitat conservation, and related areas that advance resource efficiency and biodiversity while addressing threats to ecosystem integrity such as land fragmentation and contamination. Typical initial commitments range from about 0.5 million to 5 million dollars, with investments primarily in North America and increasingly global opportunities. The firm seeks both financial returns and measurable ESG impact by supporting scalable solutions across energy, climate resilience, and environmental remediation.

Amanda Bamberger

Vice President

Brandon Blaesser

Senior Associate

Geoffrey Eisenberg

Partner

James Everett

Managing Partner and Founder

Sasha Brown

Partner

Past deals in Energy Storage

Evenergi

Series A in 2025
Evenergi is a software-as-a-service company and eMobility consultancy, driving towards a sustainable future.

Liminal

Venture Round in 2024
Liminal, formerly known as Feasible, Inc., specializes in battery analytics through its innovative EchoStat platform, which utilizes ultrasound waves to assess the physical properties of batteries. By sending ultrasonic pulses through a battery and analyzing the resulting echoes, Liminal can detect differentials within individual cells, across multiple cells, and even between production lines. This technology allows for real-time insights into the electrical, thermal, and mechanical conditions of battery components, making it particularly valuable for industries such as automotive, residential storage, grid storage, and consumer electronics. Founded in 2015 and headquartered in Emeryville, California, Liminal is positioned to enhance battery performance and reliability through its advanced screening and analytics capabilities.

ZeroAvia

Series C in 2024
Founded in 2017, ZeroAvia develops zero-emission aircraft propulsion systems designed to eliminate aviation emissions while maintaining operational efficiency. The company focuses on scalable hydrogen-electric technologies that can retrofit existing aircraft and support sustainable aviation.

Battery Smart

Series B in 2024
Battery Smart is an electric vehicle (EV) battery-swapping network based in Delhi, India, founded in 2019. The company focuses on providing advanced lithium-ion batteries specifically designed for electric two-wheelers and three-wheelers. Its innovative retrofittable 48V lithium-ion twin battery system is compatible with various electric rickshaw and two-wheeler models. Battery Smart's fully interoperable battery-swapping solution allows EV drivers to efficiently swap their batteries in just two minutes, alleviating concerns related to range anxiety, charging downtime, and the recurring costs of battery replacements. By offering a practical and quick solution for battery management, Battery Smart aims to enhance the convenience and accessibility of electric mobility in India.

Battery Smart

Series B in 2024
Battery Smart is an electric vehicle (EV) battery-swapping network based in Delhi, India, founded in 2019. The company focuses on providing advanced lithium-ion batteries specifically designed for electric two-wheelers and three-wheelers. Its innovative retrofittable 48V lithium-ion twin battery system is compatible with various electric rickshaw and two-wheeler models. Battery Smart's fully interoperable battery-swapping solution allows EV drivers to efficiently swap their batteries in just two minutes, alleviating concerns related to range anxiety, charging downtime, and the recurring costs of battery replacements. By offering a practical and quick solution for battery management, Battery Smart aims to enhance the convenience and accessibility of electric mobility in India.

ZeroAvia

Series C in 2023
Founded in 2017, ZeroAvia develops zero-emission aircraft propulsion systems designed to eliminate aviation emissions while maintaining operational efficiency. The company focuses on scalable hydrogen-electric technologies that can retrofit existing aircraft and support sustainable aviation.

Battery Smart

Series B in 2023
Battery Smart is an electric vehicle (EV) battery-swapping network based in Delhi, India, founded in 2019. The company focuses on providing advanced lithium-ion batteries specifically designed for electric two-wheelers and three-wheelers. Its innovative retrofittable 48V lithium-ion twin battery system is compatible with various electric rickshaw and two-wheeler models. Battery Smart's fully interoperable battery-swapping solution allows EV drivers to efficiently swap their batteries in just two minutes, alleviating concerns related to range anxiety, charging downtime, and the recurring costs of battery replacements. By offering a practical and quick solution for battery management, Battery Smart aims to enhance the convenience and accessibility of electric mobility in India.

Liminal

Series A in 2023
Liminal, formerly known as Feasible, Inc., specializes in battery analytics through its innovative EchoStat platform, which utilizes ultrasound waves to assess the physical properties of batteries. By sending ultrasonic pulses through a battery and analyzing the resulting echoes, Liminal can detect differentials within individual cells, across multiple cells, and even between production lines. This technology allows for real-time insights into the electrical, thermal, and mechanical conditions of battery components, making it particularly valuable for industries such as automotive, residential storage, grid storage, and consumer electronics. Founded in 2015 and headquartered in Emeryville, California, Liminal is positioned to enhance battery performance and reliability through its advanced screening and analytics capabilities.

ZeroAvia

Series A in 2021
Founded in 2017, ZeroAvia develops zero-emission aircraft propulsion systems designed to eliminate aviation emissions while maintaining operational efficiency. The company focuses on scalable hydrogen-electric technologies that can retrofit existing aircraft and support sustainable aviation.

ZeroAvia

Series A in 2020
Founded in 2017, ZeroAvia develops zero-emission aircraft propulsion systems designed to eliminate aviation emissions while maintaining operational efficiency. The company focuses on scalable hydrogen-electric technologies that can retrofit existing aircraft and support sustainable aviation.

Sunverge Energy

Series D in 2019
Sunverge Energy develops and operates a cloud-based platform for the aggregation and management of distributed energy resources, enabling co-optimization of generation, storage, and load. Its Sunverge Solar Integration System (SIS) and SISport load management software distribute renewable energy generation and storage and shape residential peak load. The company serves homeowners, small and medium-sized businesses, utilities, and electricity regulators. Founded in 2010, Sunverge is based in San Francisco, California, with an office in Fortitude Valley, Australia. It has strategic alliances with LG Electronics and collaborates with Eaton to advance distributed energy resources. Sunverge aims to make renewable power reliable, economical, and accessible by aligning services across the energy value chain, helping customers manage infrastructure investments, lower generation costs, increase system reliability, and meet renewable energy goals.
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