John ArndtFirst 1000
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@johnarndt

Building Ghost Cofounder. AI that runs your business, not just your prompts. Ex-PayPal, Cloudflare, fintech.

Joined March 2026

Sacramento, United States

ghostcofounder.com

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Builder #527 on Builders.to

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About

I spent 12 years selling enterprise software to banks and Fortune 500s. PayPal, Cloudflare, fraud detection companies. Now I'm building the tools I wish existed. Ghost Cofounder is an autonomous AI cofounder that builds, distributes, and monitors your business. Not a chatbot. Not a copilot. An actual operating partner with persistent memory that knows your business and gets better over time. I'm also building RegSentry (automated legal compliance) and ReeltyPro (AI real estate videos). I ship a lot. Most of it with Claude Code and too much coffee at midnight. Background in document fraud, risk, and payments. I know what it takes to make AI trustworthy enough for regulated industries to actually use. Building in public.