We’re former founders and operators who’ve lived the journey — navigating long sales cycles, building in uncertain markets, and scaling before the playbook existed. We invest the way we wish we had been backed.
Act One Ventures is led by Michael Silton and Alejandro Guerrero, supported by a network of advisors who’ve helped scale category-defining companies. We show up early and stay close through the messy middle and beyond.
While our roots are in the Los Angeles operator community, Act One has expanded to include a dedicated presence in San Francisco. We provide our portfolio companies—regardless of where they are based—with a direct bridge to the talent, capital, and customers that define the California tech landscape.


















