David Sacks is a South African-born venture investor at Craft Ventures who brings unusually deep operational experience as founding COO of PayPal and founder/CEO of Yammer (sold to Microsoft for $1.2B), which he draws on when coaching founders on scaling from product-market fit to large outcomes. He's known for formalizing the "Burn Multiple" metric for SaaS companies and co-hosting the All-In podcast, where he regularly shares his investing philosophy and startup playbooks in public, giving founders and investors clear visibility into his thinking on company building and capital efficiency. David Sacks is a South African-born venture investor at Craft Ventures who brings unusually deep operational experience as founding COO of PayPal and founder/CEO of Yammer (sold to Microsoft for $1.2B), which he draws on when coaching founders on scaling from product-market fit to large outcomes. He's known for formalizing the "Burn Multiple" metric for SaaS companies and co-hosting the All-In podcast, where he regularly shares his investing philosophy and startup playbooks in public, giving founders and investors clear visibility into his thinking on company building and capital efficiency.