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Greylock Partners is a venture capital firm that backs founders at the earliest stages, often as their first investor before a product exists.

Index Ventures is a venture capital firm that backs founders across the globe, investing in the people behind ideas from early through later stages.

Kleiner Perkins is a venture capital firm that backs founders across technology and life sciences, with a portfolio of companies from early stage through growth.

Obvious is a venture capital firm focused on supporting founders building solutions to humanity's largest challenges across planetary health, human health, and economic health.

Electric Capital is an early-stage venture firm founded in 2018 that backs founders building trust-minimized technologies across AI, crypto, fintech, and related sectors.

Operator Partners is an investment firm run by operators that invests its own capital in technology companies from inception through Series B.

Flatiron Health is a healthcare technology and oncology data company that combines AI-powered technology, clinical expertise, and real-world oncology data to support cancer care and research. It operates one of the world's largest oncology datasets and provides point-of-care technology to oncologists.

Comcast Ventures is the venture investing arm of Comcast NBCUniversal, backing early- to growth-stage companies across sectors relevant to Comcast's future business, and offering portfolio companies access to the parent company's expertise, scale, network, and resources.

Climate Capital runs a "Network Fund" as an AngelList rolling micro-fund that writes many small checks ($10k–$25k) into the top 10–20 climate startups per quarter, giving individual LPs "large fund" diversification with low minimums through a structure much closer to an angel-syndicate model than a traditional closed-end VC fund. The firm has deliberately built a very large, democratized LP base of 2,000+ individual LPs via its rolling Network Fund and syndicate, turning climate-interested operators and angels into co-investors and creating a distribution/mentorship network for founders that is structurally different from the small institutional LP bases of most VC funds.

Lombardstreet Ventures is a pre-seed and seed-stage venture capital firm based in Woodside, California, investing primarily in U.S. companies with a preference for Silicon Valley teams. The firm focuses on B2B software, SaaS applications, developer tools, infrastructure software, deep tech, API-first platforms, open source, and AI, while remaining open to exceptional opportunities across sectors aligned with strong founders and compelling visions.

Ligature is a design-focused venture fund that invests its own capital in early-stage and growth companies and works hands-on with founders to build strong design into their products from day one.