Sep 15, 2025

Numeral: Building the Global Tax Platform

Co-founder Sam Ross discusses Numeral's journey from a personal e-commerce pain point to a venture-backed global tax platform. He covers the market opportunity created by outdated incumbents, the 'do things that don't scale' approach to finding product-market fit, lessons from fundraising, and how Numeral leverages AI to automate complex compliance workflows, shifting from a tool to a full-service solution.

Jul 30, 2025

How we hacked YC Spring 2025 batch’s AI agents — Rene Brandel, Casco

A security analysis of YC AI agents reveals that the most critical vulnerabilities are not in the LLM itself, but in the surrounding infrastructure. This breakdown of a red teaming exercise, where 7 out of 16 agents were compromised, highlights three common and severe security flaws: cross-user data access (IDOR), remote code execution via insecure sandboxes, and server-side request forgery (SSRF).