We’re founders, backing founders.
Founded in 2016. 70+ companies backed. 5+ exits.
We invest the way we wish we had been backed.
We’re former founders and operators who’ve lived the journey: long sales cycles, uncertain markets, scaling before the playbook existed.
Act One is led by Michael Silton and Alejandro Guerrero, who have worked together for fifteen years and built the firm over ten. We show up early and stay close through the messy middle and beyond.
Founded in Los Angeles, we moved the firm to San Francisco in 2026 and rebuilt it for the AI era. Act One runs on AI agents we built in-house, and we invest in founders building AI-native companies.
Team
Alejandro Guerrero
Co-Founder & General Partner
Previously: Associate, UCLA VC Fund; CEO/Founder, UniqApp; Co-Founder, Live Entertainment Network
Michael Silton
Co-Founder & Managing Director
Previously: Executive Director, UCLA VC Fund; CEO/Founder, Rainmaker Systems; CEO/Co-Founder, UniDirect Systems (sold to Avnet)
AI POWERING AGENTS
The Fleet
Built in-house and trained on our history. For our team, it means depth on every company we meet. For our founders, it means an edge they can act on, quarter after quarter, from a firm that shows up prepared.
MEET THE FLEET
Operating Partners
In The Press
No Stanford. No Network: He Found a $3.1B Exit Every VC Missed
2026
In the Spotlight - Alejandro Guerrero
2026
America's Top Venture Capital Firms 2025
2025
Bloomberg Markets: The Close 02/15/2024
2024
LPs Doubt Venture Funds’ Startup Valuations
2024
Latino Founders Have a Hard Time Raising Money From VCs
2023
Act One Ventures Silton and Guerrero on the Diversity Rider initiative, building meaningful partnerships, and operating experience has been key to their model
2023
Venture capital firms to include "diversity riders" in term sheets
2023
