Sonny Sangha

🔴 Let's build an AI Newsletter SaaS with Next.js 16! (MongoDB, Prisma, OpenAI, AI SDK, Clerk, Stripe)

Join me as I show you how to build an AI Powered Newsletter SaaS App from scratch with the latest Next.js 16 - This comprehensive tutorial covers everything you need to create an AI Newsletter SaaS App with Subscriptions & Payments!


🎯 What You'll Learn

🚀 Modern Tech Stack (Using the NEWEST Releases!):

- Next.js 16 - JUST RELEASED! React 19 with App Router, Turbopack, and Server Components

- OpenAI Integration - GPT-4o by default (fully customizable: gpt-4o, gpt-4o-mini, gpt-3.5-turbo)

- MongoDB + Prisma - NoSQL database with type-safe ORM and auto-generated TypeScript types

- Clerk - Complete authentication + billing integration with plan-based feature gating

- Tailwind CSS v4 - Modern utility-first styling

- RSS Parser - Automated content aggregation from multiple feed sources

- Server-Sent Events (SSE) - Real-time streaming with progressive updates



💻 Core Features:

- AI Newsletter Generation - Streaming AI responses with customizable models (GPT-4o, GPT-4o-mini, GPT-3.5-turbo)

- RSS Feed Aggregation - Unlimited sources with tier-based limits (Starter: 3 feeds, Pro: unlimited)

- Smart 3-Hour Caching - Cross-user cache reduces API calls by 80-90%

- Article Deduplication - GUID-based storage prevents duplicates across feeds with sourceFeedIds tracking

- Complete Newsletter Output - 5 title options, 5 subject lines, full body, top 5 announcements, insights

- User Settings System - Custom tone, brand voice, target audience, disclaimers, sender info

- Newsletter History - Pro-only feature: save and access all past newsletters

- Date Range Selector - Weekly, monthly, or custom date ranges for content curation

- Real-Time Streaming - Watch newsletter generation live with progressive SSE updates

- Plan-Based Feature Gating - Clerk integration with Starter and Pro tier restrictions



🛠️ Advanced Concepts:

- Intelligent Cross-User Caching - Shared cache benefits all users (MongoDB lastFetched optimization)

- Article Deduplication Architecture - O(1) lookups with unique GUID indexing + sourceFeedIds arrays

- Server-Sent Events Implementation - Progressive streaming with SSE helpers and ReadableStream

- Prisma with MongoDB - Schema design, upsert operations, efficient indexing strategies

- AI Prompt Engineering - Context-aware prompts with user settings and article summaries

- Streaming AI Responses - Vercel AI SDK’s streamObject with Zod schema validation

- Feature Gating with Clerk - Plan-based restrictions (`has({ plan: “pro” })`) for premium features

- Comprehensive Error Handling - Database error wrapper with Prisma-specific error codes

- Server Actions - Next.js 16 server actions for all database operations

- Bulk Operations - Promise.allSettled for parallel feed refreshing



✨ Perfect for developers who want to build AI-Powered SaaS applications


I'll see you soon PAPAFAM. Peace! ✌️


Set your Reminder for the video below👇

2 weeks ago | [YT] | 26