SaaStr Vibe-Codes AI VP of Marketing in 14,230 Lines — Revenue Flips from -19% to +47%

SaaStr·medium signal

SaaStr's non-developer founder built '10K,' an internal AI VP of Marketing using Replit and Claude Opus across 74 files and 373 commits. The system runs daily standups, designs campaigns, manages team assignments, and synthesizes real-time data from Salesforce and registration systems into a six-month marketing plan with a built-in natural language query interface. The result: revenue growth flipped from -19% to +47%, replacing work that previously required multiple full-time humans — a concrete case study of a SaaS company eating its own marketing stack with a vibe-coded tool.