Cua

Executive Summary

Cua is a YC X25-backed pre-seed startup building sandboxed VM infrastructure for computer-use AI agents — essentially "Docker for agents that control full operating systems." The market timing is genuinely strong: Anthropic's computer use API created a new category in late 2024 and enterprise demand for safe agent execution environments is real, validated by E2B's $32M raise. The founding team has unusually deep domain credibility — they co-authored the Windows Agent Arena benchmark at ICML 2025 and were among the first builders in the space — but the company has only $500K raised, 3 employees, no disclosed revenue, and faces an existential risk that Anthropic, OpenAI, Google, and Microsoft may absorb this infrastructure layer natively into their own platforms. The single biggest risk is not competition from E2B — it's that hyperscalers commoditize the sandbox layer before Cua can establish a durable enterprise wedge.