Second Avenue Partners is a Seattle-based venture capital firm established in February 2000, specializing in providing management, strategy, and capital to early-stage companies in the Greater Puget Sound area. The firm focuses on investing in promising teams and transformative ideas across various sectors, including internet, consumer and social media, software, and clean energy. Their investment approach emphasizes early-stage investments, fostering long-term relationships, and actively assisting portfolio companies in becoming market leaders.

The founding partners are Nick Hanauer, Pete Higgins, and Mike Slade. The firm has funded companies such as Market Leader (NASDAQ: LEDR), acquired by Trulia; In Situ, acquired by Boeing; Azaleos, acquired by Avanade; Newsvine, acquired by MSNBC.com; Fan Nation, acquired by Sports Illustrated; Knock, acquired by RealPage; Seeq Corp; RealSelf; Modumetal Inc.; Tree Ring; Flexe; FitOn; Iota Software; Uplevel; Iunu; and Footprint US.