Kleiner Perkins Caufield & Byers, LLC, commonly known as Kleiner Perkins or KP, is an American venture capital firm which specializes in investing in early stage and growth companies. Since its founding in 1972, the firm has backed America Online, Amazon.com, Tandem Computers, Compaq, Electronic Arts, JD.com, Square, Genentech, Google, Netscape, Sun Microsystems, Nest, Palo Alto Networks, Synack, Snap, AppDynamics, Twitter, Applied Intuition, Anthropic, Waymo, Glean Technologies, OpenEvidence, Rippling, Harvey & Together AI. By 2024, it had raised 21 venture capital funds and six growth funds. In 2026, the firm announce its twenty-second venture fund, KP22, a $1 billion fund to back early-stage companies, and $2.5 billion in growth funds to back businesses.