S28 Capital is an early-stage Venture Capital firm in San Francisco. We were CTOs and operators for the last 10 years before getting into investing, and have built companies like PagerDuty (NYSE:PD) and Playdom (acq by Disney). We've invested in Zoom, Palantir, Coupang, Noom, PlanGrid, Mattermost, Rippling, Collective Health, Aurora Solar, Vercel, and others.