Seraph Group is an angel group in Foster City that prefers to invest in invests in technology startups. Founded 2005 by Tuff Yen in Foster City, California, the firm invests in early stage ventures, seed stages, series A, and series B rounds. The notable investment portfolio OF Seraph Group includes BUTTON Wallet, Eko, Molecula, Lucira Health, and Second Genome. Seraph Group typically invests between $50,000 and $1,000,000 in early-stage companies. As of January 2020, Seraph Group has made 45 investments and 12 exits; and is actively looking for new investment opportunities.