This video is sponsored by Enter Pro. Includes paid promotion. Try Enter Pro: https://enter.converge.ai/s/wVi7vR I gave an AI builder the meanest realistic spec I could think of: a multi-tenant e-commerce SaaS with real accounts, real data persistence, and real Stripe payments. Here is what happened, live and unedited. 0:00 - The Truth About Building Apps or Websites with AI in 2026 1:13 - Why I Partnered with Enter Pro (Honest Review) 2:00 - Building Market Nest: A Full-Stack SaaS From Scratch 2:20 - What is Multi-Tenancy? (SaaS Architecture Explained) 3:14 - Live Demo: Setting Up a Merchant Account 3:53 - Testing Database Persistence & User Sessions 4:27 - Testing Tenant Isolation (Security & Privacy) 5:12 - Free vs. Pro Tiers 5:24 - Stripe Payment Integration Tutorial 6:23 - One-Click Deployment to Production 6:49 - Code Review: Clean React & Exporting Without Vendor Lock-in 7:42 - Is the Pro Plan Worth It? 8:12 - My Honest Verdict: Can AI Really Build SaaS? 8:56 - Start Building Your AI App Today 🔔 Subscribe for more real-world AI builds: https://youtube.com/@SirajRaval 📬 Business inquiries: hello@sirajraval.com 📲 Follow X: https://x.com/sirajraval Instagram: https://instagram.com/sirajraval LinkedIn: https://linkedin.com/in/sirajraval Follow Enter Pro: @EnterProAI #EnterPro #convergeai #AI #ArtificialIntelligence #AItools #SaaS #BuildWithAI #AIcoding