Jack Altman

Jack Altman co-founded Lattice in 2015, built it into a $3 billion HR software platform used by thousands of companies, then stepped down as CEO in 2023 to become a full-time investor. He raised two funds totaling $425 million under Alt Capital before joining Benchmark as a General Partner in February 2026 - one of venture's most storied and flat-structured firms. He is also a WSJ bestselling author, podcast host, and the younger brother of OpenAI co-founder Sam Altman.