James W. Breyer is a venture capitalist who primarily invests in early-stage to growth technology companies. See sector focus and contact routes.
James W. Breyer is a venture capitalist who primarily invests in early-stage to growth technology companies, with a distinctive thesis centered on artificial intelligence (AI) intersecting with healthcare, life sciences, and fintech [3][4][7]. His most notable portfolio company is Facebook, which he backed as one of the earliest venture investors during his tenure at Accel Partners, alongside other major successes like Spotify, Etsy, Epic Games, and Circle [1][6][7]. Through his firm Breyer Capital, founded in 2006, he makes high-conviction, long-term investments often as the first institutional check, focusing on sectors where AI transforms biomedical innovation and digital payments [3][7][9].
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