AI SaaS Validation Strategies for Solo Founders in 2026

AI SaaS validation is what separates a real business from a zombie company — an app with glowing reviews that's bleeding to death financially. This episode is the complete pre-build playbook for 2026: Steve Blank's customer development manifesto applied to vibe coding, how to mine Reddit for high-intensity pain using the frequency vs intensity matrix, and how the Idea Sieve agent (730-line system prompt, two-model routing at 12–15 cents per run) automates brutal idea destruction before you write a line of code. Plus the fake door test with real benchmarks (cold traffic: 0.44%–0.65% CTR, warm community traffic: 15%–25% opt-in rate), the Astra AI margin trap case study (170K users, $125K–$250K/month in OpenAI bills, 39–69% gross margin before salaries), how Lovable hit $200M ARR in 12 months with a credit-based model that scales with compute cost, the Trojan Horse community marketing tactic that got 100 paying users in 48 hours with zero ad spend, and why traditional SEO is dying and GEO (Generative Engine Optimization) is the new game.