Climate & Clean Energy Startups in California

California

Investing in hard technology — chemistry and materials innovations, medical devices, life sciences, sustainability and energy. CAN Fund I invests up to $150K in early-stage startups; geography...

Redwood City, CA

Working Capital Fund invests in early and growth-stage technology companies that create responsible, transparent, and equitable global supply chains. Focus areas include AI/ML, computer vision,...

Santa Monica, CA

Founded in 1996, Upfront Ventures is a venture capital investment firm based in Santa Monica, California. The firm prefers to invest in companies operating in the commercial services, software,...

San Mateo, CA

Wildcat Venture Partners invests in B2B and B2B2C startups leveraging Artificial Intelligence and Machine Learning to disrupt industrial sectors, with a focus on healthcare and the energy transition....

San Francisco, CA

Early-stage, AI-first venture firm investing in Applied AI across Future of Work/Productivity, Mobility, Health, Financial Infrastructure, Digital Infrastructure, and Climate & Energy. Often leads...

Palo Alto, CA

Single-keyword thesis: 'early' — focus on early-stage, seed investing (often YC startups). Data-driven, lightning-fast execution; founder/operator led.

Culver City, CA

Navitas Capital focuses on transformative technology and innovation in the built world (real estate and construction). The firm invests in startups leveraging AI, digitization, sustainability, and...

Silicon Valley, California

Nucleation Capital invests in next-generation nuclear (fission, fusion, LENR, radioisotope), carbon management (capture, utilization, synthetic fuels, carbon-based materials), and grid enhancement...

Menlo Park, CA

Capital-efficient investing in enterprise B2B technology. Initial checks $250k-$1M into early-stage companies with proof of first revenue; focus on Silicon Valley with selective Hawaii and other...

Atherton, CA

Founded in 2010, PivotNorth Capital is a venture capital firm based in Atherton, California. The firm prefers to invest in wages, housing, banking, transportation, food, internet access, education,...

San Mateo, CA

Early-stage VC focused on B2B startups in the US and Japan, primarily Seed and Series A. Investment focus spans Enterprise SaaS/Cloud, Fintech, Deeptech/Robotics, Sustainability/Cleantech, and select...

Menlo Park, CA

Venture Funds and Operating System for Independent VC Professionals. Join as a Partner; apply to raise or recommend startups. Focus on companies on the market with revenue or lead investment from...

San Diego, CA

Mid-stage, community-oriented VC focused on propelling technology startups globally. Preference for software-enabled, capital-efficient B2B models (open to select B2C and HaaS). Typical first check...

Burlingame, CA

We invest in a small number of select founders and actively mentor them to achieve success. With 30+ years of experience founding and scaling startups, our team provides hands-on operational support,...

Menlo Park, CA

Provides debt and equity financing to venture capital-backed companies globally across company lifespans; focuses on structuring flexible transactions and partnering with VCs and entrepreneurs.

California

Member-driven Silicon Valley angel group (145+ members) focused on seed to B-stage investments in disruptive, scalable technology companies. Provides capital, mentorship, and network access;...

San Diego, CA

NuFund is an angel-led venture group based in San Diego that operates an Annual Fund model. We focus on early-stage (pre-seed to post-seed) technology and life-science companies...

Bakersfield, CA

Industry-agnostic early-stage to Series B investor focused on companies that positively impact Kern County and the Central Valley; leverages local strengths in aerospace, energy, agriculture,...

San Francisco, CA

Band of Angels is a formal group of 150+ angel investors based in Silicon Valley with presence in San Francisco and Los Angeles, investing primarily at Pre-Seed to Series A. Since 1994, the Band has...