Same job, new rules

In the AI era, the founder's job hasn't changed: find a real problem, build something that solves it, and scale it into a company that matters. What's changed is the path to get there. Across the four stages—Idea, MVP, Launch, and Scale—AI compresses quarters into weeks.

Validation cycles that used to take months now take afternoons. A working prototype no longer requires a co-founder with the right stack; it requires a clear problem and a few focused sessions with a coding agent. Launch readiness compresses from a pre-launch scramble into a continuous workstream. And at scale, the operational weight that used to force early hires into firefighting roles can increasingly be handed off to AI, freeing your team to spend their attention on the judgment calls that become your moat.

The bottlenecks are no longer what you can build, but what you choose to build.

Resources

Building with Claude

• Building AI Agents for Startups: (opens in new tab) Shares how startups use agents to become less founder-dependent as they scale.
• Claude Code docs: (opens in new tab) Carries builders from initial installation to advanced agentic workflows. Pro-tip: get started with the "How Claude Code works" overview.
• Claude Code best practices: (opens in new tab) Covers patterns that have worked inside Anthropic and across engineering teams — context management, permissions, planning, and verification workflows.
• Using CLAUDE.md files: (opens in new tab) Walks through how to configure Claude Code for your specific codebase. Essential reading for MVP-stage founders setting up their development environment.
• Claude Code power user tips: (opens in new tab) Highlights workflow patterns from the Claude Code team itself, including parallel sessions and verification loops.
• Get started with Claude Cowork: (opens in new tab) Shares how teams can set up Claude Cowork and start implementing skills, plugins, and other features that scale its impact across your startup.
• Tutorials: claude.com/resources/tutorials (opens in new tab) offers a searchable list of hands-on walkthroughs for specific tasks.

Founder stories

• How three YC startups built their companies with Claude Code: (opens in new tab) Examining how HumanLayer (F24), Ambral (W25), and Vulcan Technologies (S25) used Claude to get prototypes to market fast and scale AI-powered platforms with agentic coding workflows.
• GC AI (opens in new tab)'s founders used domain expertise to build a responsive, Claude-powered legal platform for how in-house teams actually work: company-specific playbooks, cross-functional stakeholders, and variable risk tolerance thresholds
• Carta Healthcare (opens in new tab) uses Claude to power their clinical abstraction platform, processing 22,000 surgical cases per year and reducing data abstraction time by 66%.
• Anything (opens in new tab), powered by Claude and the Agent SDK, has helped 1.5 million users turn ideas into working software products without writing code, including a non-technical founder who built and is already selling a full recruiting platform. Anything's AI agent handles the full build so solopreneurs can double down on their domain expertise.
• Cogent (opens in new tab) is an applied AI lab building agents to automate critical enterprise security tasks. The startup uses Claude as the reasoning layer for agents that automate investigation, prioritization, and remediation across the full vulnerability lifecycle.
• Airtree (opens in new tab) uses Claude Cowork as the center of its operations infrastructure, uniting data that used to be scattered across a dozen different tools and teams. Now, when one person builds a workflow automation with skills, everyone in the organization can use it to do all the things on their to-do list that never got done.
• Duvo (opens in new tab) builds AI agents that run procurement, supply chain, and category management processes across ERPs, supplier portals, spreadsheets, email, and even phone calls. Duvo is built entirely on Claude, using the Agent SDK to orchestrate across workflows where every API call runs under Anthropic's Zero Data Retention mode.
• Zingage (opens in new tab) is an AI agent platform built for 24/7 automated operations for home-care agencies. The startup uses Claude's structured tool calling to orchestrate across an EMR and multiple communication channels while safeguarding PHI, and Claude's contextual reasoning to build agents that can give nuanced, patient-tailored outcomes rather than pattern-matching to the most common response.
• Kindora (opens in new tab) is an AI-powered platform built by a nonprofit executive who used Claude Sonnet to build a desperately-needed tool for intelligently matching charities with funders. After filtering thousands of matches down to the few worth pursuing, Kindora's MCP connector lets nonprofits access its prospecting tools directly within Claude.
• Wordsmith (opens in new tab) was founded by a lawyer-turned-CTO to provide reliable AI-powered legal technology for in-house legal teams. Claude is the reasoning engine for Wordsmith's contract review, agreement drafting, and document review capabilities, and the startup's engineering team uses Claude Code for building and evolving the platform itself.

Startup support and opportunities

• Anthropic Startups Program: (opens in new tab) For startups working with Anthropic's VC partners, the program provides free API credits, the highest tier of publicly available rate limits, and invitations to exclusive founder events and workshops.
• Claude community: (opens in new tab) Forums and community spaces for builders.
• Live learning resources: (opens in new tab) Conferences, webinars, livestreams, and recordings.