After building 50+ products, this is the tech stack we recommend to every startup founder. By David Friedman , Founder of AppBrewers Your tech stack is a business decision, not just a technical one. The wrong choice costs months. The right choice lets you ship fast and scale without rebuilding. Here is our battle-tested stack for 2026. Frontend Web: Next.js 15 App Router for server components Built-in SEO optimization Edge deployment on Vercel React Server Components reduce bundle size Mobile: React Native + Expo One codebase for iOS and Android Over-the-air updates Push notifications out of the box EAS Build for CI/CD Backend API: Next.js API Routes + tRPC Type-safe APIs from end to end No API client generation needed Automatic input validation Serverless: Firebase Cloud Functions Event-driven triggers Firestore integration Pay per execution Database Primary: PostgreSQL (Supabase or Neon) Relational data with JSON support Row Level Security for multi-tenancy Real-time subscriptions Cache: Redis (Upstash)…