Learn how three YC startups use Claude Code to ship products faster, win government contracts, and scale AI-powered platforms with agentic coding workflows.

Claude

Three Y Combinator startups share how they used Claude Code to accelerate development. HumanLayer built their entire platform and pioneered context engineering practices. Ambral uses Claude's Agent SDK with subagents to power AI-driven account management workflows. Vulcan Technologies, founded by non-technical founders, won government contracts by building regulatory analysis tools entirely with Claude. Key practices include separating research, planning, and implementation into discrete sessions, deliberate context management, and monitoring AI chain of thought to catch errors early.

How three YC startups built their companies with Claude Code

HumanLayer: From SQL agents to scaling AI-first engineering teams

Ambral: Building production systems with subagents

Vulcan Technologies: Empowering non-technical founders to launch products