Quick answer
For most Indian startup MVPs in 2026: Next.js or React frontend, Node or Python API, PostgreSQL or Supabase, Vercel or AWS hosting, and Razorpay for payments. Add mobile only when mobile-first user behavior is proven.
Stack by product type
- B2B SaaS — Next.js, Postgres, Stripe/Razorpay
- Marketplace — Next.js, Postgres, search (Algolia/Meilisearch)
- Mobile-first consumer — Flutter or React Native + API
- AI product — Python FastAPI, vector DB, React UI
- IoT + software — ESP32 edge + cloud API + dashboard
Avoid premature complexity
Microservices, Kubernetes, and multi-region deploys are rarely day-one needs. Ship monolith MVPs, measure usage, then scale architecture with real traffic data.