Micro-SaaS 90-Day Build — Stripe·Supabase·Vercel Free Plan to $1,200 MRR (2026)

🤔 The Real Question Behind the 90-Day Micro-SaaS Build Can you actually build a micro-SaaS in 90 days and reach 5 paying users? The answer is yes — but only when the build flow and integration patterns are decided in advance. The market median for micro-SaaS reaches roughly $1,200 MRR (about 48 paying users × $25) by day 90, and that trajectory has effectively standardized around the Stripe checkout + Supabase Auth + Vercel Functions stack. If you follow the same pattern, the actual code you'll