Welcome back to the channel! In this video, I’ll show you how to build a fully featured AI Image Editor SaaS application using the latest technologies — Next.js 15, Neon (PostgreSQL), Polar payments, Better Auth authentication, and ImageKit for AI-powered image editing — all deployed on Vercel, completely free to get started. Also I have used ImageKit. ImageKit is an image and video API with AI powered DAM.
✅ Key Features:
Secure user authentication with email, password &amp; social logins (Better Auth)
Payments &amp; credits system with Polar
AI-powered image editing: background removal, upscaling &amp; smart cropping
Project management with saved history in database
Customer portal with invoices, billing info &amp; credit packs
Fully responsive design with modern UI
Real-time credit deduction system
Smooth transitions &amp; professional SaaS layout
Deployed serverlessly on Vercel
🧠 Built With:
Next.js 15 (App Router + Server Actions)
Tailwind CSS for styling
Neon + Prisma for database
Polar for payments
Better Auth for authentication
ImageKit for image storage, optimisation &amp; AI features
Vercel for free, scalable deployment
💡Perfect for anyone learning full-stack development, Next.js SaaS apps, or integrating AI features into modern projects.
<a href="https://www.youtube.com/watch?v=jjpmhBToitQ" target="_blank" rel="noopener nofollow">https://www.youtube.com/watch?v=jjpmhBToitQ</a>
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Reinier

A comprehensive tutorial for building an AI-powered image editing SaaS application using Next.js 15, featuring user authentication, payment processing with credits system, AI image manipulation capabilities (background removal, upscaling, smart cropping), and complete project management. The stack includes Neon PostgreSQL database, Polar for payments, Better Auth for authentication, ImageKit for AI image processing, and Vercel deployment.

Next.js 15 AI Image Editor SaaS – Build a Full Stack App with Neon, Polar, Better Auth & ImageKit