Sand Hill Angels is a Silicon Valley-based angel investment group composed of experienced entrepreneurs, executives, and technology professionals who invest personally in early-stage startups; it focuses on seed-stage investments in disruptive, scalable technologies across enterprise software, consumer internet, hardware, and life sciences; the group is known for combining capital investment with hands-on mentorship, leveraging deep industry expertise to support founders; it typically invests alongside institutional VCs and participates in syndicates across the broader Silicon Valley ecosystem; overall it functions as a prominent angel investor network rather than a traditional venture capital fund.