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Lowercarbon Capital is a venture capital firm founded in 2020 and headquartered in San Francisco, California. The firm was established by Chris Sacca and Crystal Sacca, both of whom have extensive backgrounds in technology investments. Lowercarbon Capital focuses on investing in companies that develop technologies aimed at reducing carbon emissions and addressing climate change. As of 2026, the firm manages approximately $2.4 billion in assets across multiple funds and has invested in over 207 companies.
The firm has made significant strides since its inception, launching several funds including Fund I, which raised around $800 million in 2021, and Fund II, which secured approximately $350 million in 2023. Additionally, Lowercarbon Capital has initiated a second fusion-focused fund, announced in November 2025, further expanding its investment capabilities. The firm operates primarily in the United States but also engages in notable deals in the UK and Europe.
Lowercarbon Capital invests in technologies that aim to slash new CO2 emissions, suck up carbon from the atmosphere, and explore methods to cool the planet. Their investment strategy encompasses a wide range of sectors, including energy, transportation, industrial materials, and agriculture. The firm is particularly interested in innovations that contribute to a sustainable future, focusing on themes such as electric vehicles, carbon-neutral cement and steel, alternative proteins, direct air capture (DAC), climate fintech, and nuclear fusion.
Lowercarbon Capital typically invests across various stages, from seed to growth, although specific check sizes are not publicly disclosed. The firm seeks to partner with startups that demonstrate a strong commitment to addressing climate change through innovative solutions. Their geographic focus is primarily on the United States, but they also consider global opportunities, particularly in the UK and Europe.
Lowercarbon Capital's portfolio includes a diverse range of companies that are making significant impacts in the climate tech sector. Notable portfolio companies include:
This extensive portfolio reflects Lowercarbon Capital's commitment to supporting companies that are at the forefront of climate innovation.
Chris Sacca: Co-founder of Lowercarbon Capital, Chris has a notable background as an early investor in companies like Twitter and Uber through his previous firm, Lowercase Capital. He is recognized for his appearances on Shark Tank and his expertise in technology investments.
Crystal Sacca: Co-founder and partner at Lowercarbon Capital, Crystal brings a wealth of experience in venture capital and a strong commitment to climate technology.
Ryan Orbuch: Partner at Lowercarbon Capital, Ryan has a background in technology investments and plays a key role in sourcing and evaluating potential portfolio companies.
Clay Dumas: Partner at Lowercarbon Capital, Clay focuses on identifying innovative startups in the climate tech sector and supporting their growth.
Gaurab Chakrabarti: CEO & Co-founder of Solugen, Gaurab is involved with Lowercarbon Capital, bringing expertise in sustainable chemical production.
Matt Rogers: CEO & Co-founder of Mill, Matt is recognized for his work in transforming food waste into compost and is a key figure in Lowercarbon Capital's portfolio.
Diego Saez-Gil: CEO & Co-founder of Pachama, Diego focuses on nature-based carbon removal solutions and contributes to the firm's investment strategy.
Startups interested in pitching to Lowercarbon Capital should visit their website at lowercarboncapital.com. It is recommended to include a comprehensive pitch deck that outlines the technology, market opportunity, and team qualifications. While specific response times are not disclosed, founders should expect a thorough review process. Warm introductions are preferred, but not mandatory.
In December 2025, Lowercarbon Capital led a $70 million raise for Fuse Energy, which reached a valuation of $5 billion. This investment highlights the firm's active role in supporting high-potential climate technology companies.
Additionally, Lowercarbon Capital participated in Getmobil's $22 million Series A round in December 2025, further expanding its portfolio in the climate tech sector. In January 2026, the firm made an investment in Avalanche, continuing its trend of backing innovative startups.
Lowercarbon Capital announced plans to raise a second nuclear fusion fund in November 2025, following the success of its first fusion fund, which raised $250 million. The firm has been recognized as one of the most active climate-focused venture capital firms in 2025, according to Sightline Climate.
What are Lowercarbon Capital's investment criteria?
Lowercarbon Capital invests in technologies that aim to reduce carbon emissions and address climate change. They focus on sectors such as energy, transportation, industrial materials, and agriculture. The firm seeks startups that demonstrate innovative solutions and a strong commitment to sustainability.
How can startups apply or pitch to Lowercarbon Capital?
Startups can pitch to Lowercarbon Capital through their website at lowercarboncapital.com. It is advisable to include a clear presentation of the technology, market potential, and team background in the pitch deck.
What makes Lowercarbon Capital different from other venture capital firms?
Lowercarbon Capital is distinct in its exclusive focus on climate technology and sustainability. The firm actively engages with its portfolio companies, providing hands-on support and impactful guidance to help them navigate challenges and accelerate growth.
What is the geographic scope of Lowercarbon Capital's investments?
While Lowercarbon Capital primarily operates in the United States, they also consider investments in notable deals across the UK and Europe, reflecting a global approach to climate innovation.
What is the typical fund size and check size for Lowercarbon Capital?
Lowercarbon Capital manages approximately $2.4 billion across multiple funds, with specific check sizes not publicly disclosed. They invest across a wide range of stages, from seed to growth.
What kind of post-investment involvement does Lowercarbon Capital have?
The firm provides hands-on support to its portfolio companies, leveraging the expertise of its experienced team to assist startups in overcoming challenges and accelerating their growth in the climate tech space.
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