Alt Capital is a San Francisco-based early-stage venture firm founded in 2023 by Jack Altman, the former CEO of Lattice. See sector focus and contact routes.
Alt Capital is a San Francisco-based early-stage venture firm founded in 2023 by Jack Altman, the former CEO of Lattice, who brings an operator’s perspective to investing. The firm invests from inception through Series A as a generalist across sectors, with a concentrated portfolio and strong emphasis on artificial intelligence, enterprise software, advanced computing, aerospace, and defense. Typical initial checks range from $1 million to $25 million, with up to $40 million reserved for follow-ons, and the firm frequently leads or co-leads rounds while syndicking with investors like Accel and SV Angel. Notable portfolio companies include Antares Industries, Retell AI, SF Compute, and Rogo, which received a $75 million Series C in January 2026. Alt Capital distinguishes itself by investing in founders rather than categories, prioritizing brilliant people solving important problems over sector bets, and maintaining tight, hands-on relationships with entrepreneurs. The firm has deployed two funds totaling $425 million—Fund I ($150M) closed in February 2024 and Fund II ($275M) closed in September 2025—and focuses primarily on US-based companies
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