Act One Ventures

Act One Ventures is a venture capital firm that invests at the pre-seed and seed stages, writing first checks into founders building companies for what it describes as the AI economy. Founded in 2016 in Los Angeles and relocated to San Francisco in 2026, the firm states it is open to investing beyond its home base. Its stated focus is on businesses re-architecting enterprise operations, with technical domains including AI agents, AI infrastructure, AI-native operating systems, AI-native services, and applied AI or LLM-based tooling. Sector coverage spans enterprise software and AI-enabled markets alongside the infrastructure and agent layers beneath them.

The firm positions itself as AI-native in both investment focus and internal practice. It operates an in-house fleet of AI agents trained on its own investment history and judgment, used to prepare for company meetings and to support portfolio founders. The operating model is built around what the firm calls hands-on support: the team is composed of former founders and operators with experience of long sales cycles, uncertain markets, and scaling without an established playbook.

On process, the firm emphasises fast decision-making and founder-friendly allocations, and says it invests the way its partners wish they had been backed - offering practical advice grounded in operating experience and staying close to founders through the more difficult stages of building and scaling. Team size and fund details are not disclosed.