Kleiner Perkins

Kleiner Perkins (formerly Kleiner Perkins Caufield & Byers, KPCB) is one of the oldest and most influential American venture capital firms, headquartered in Menlo Park, California (with offices also in San Francisco and Shanghai). The firm was founded in 1972 by Eugene Kleiner, Tom Perkins, Frank Caufield and Brook Byers. Kleiner Perkins invests at early and growth stages in technology and life-sciences companies, with current focus areas spanning consumer, enterprise, hard tech and fintech, and a growing emphasis on artificial intelligence (in 2026 the firm earmarked $3.5B for AI-related investments). The firm is chaired by John Doerr, with managing partners including Mamoon Hamid and Ilya Fushman. Since inception Kleiner Perkins has backed more than 900 technology and life-sciences companies; its historic successes include investments in Google ($12M in 1999), Amazon, Genentech, Twitter, Uber and many others. According to available data the firm manages roughly $21B in assets (2026) and by 2024 had raised 21 venture funds and six growth funds.