// stack/saas.md
# SaaS MVP Tech Stack
// stack_breakdown
FrontendNext.js (App Router) + Tailwind CSS
BackendNestJS (modular monolith)
DatabasePostgreSQL via Supabase
AuthSupabase Auth (JWT, OAuth, magic link)
HostingVercel (frontend) + Railway (backend)
// cost_estimate
USD range $1,800–$5,000
INR range ₹1.7L–₹4.7L
Timeline 6–8 weeks
// why_this_stack[]
## Why This Stack
01.Next.js App Router gives you SSR, RSC, and API routes in one repo - fewer moving parts.
02.NestJS enforces a scalable module structure from day one, avoiding the "big ball of mud" rewrite at 10k users.
03.Supabase handles auth and DB together, eliminating a whole class of integration bugs at the MVP stage.
// mvp_features[]
## Common MVP Features
-User registration, email verification, password reset
-Subscription plans with Razorpay or Stripe billing
-Role-based access control (admin / member / viewer)
-Usage dashboard and in-app notifications
-Team/organization management with invites
// risk_flags[]
## Risk Flags
!Supabase row-level security needs careful setup - skip it and you risk data leaks across tenants.
!Next.js caching behaviour changed significantly in v14/v15 - budget time to understand ISR vs. server actions.
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[ Get your SaaS estimate → ]// related_resources