Next.js has become our default framework at Strayks for SaaS products. After shipping multiple products on it, we have learned what separates a clean, scalable codebase from one that becomes a maintenance nightmare six months in.
Use the App Router
If you are starting a new SaaS in 2025, use the App Router. It gives you React Server Components, better SEO, simpler data fetching, and a cleaner mental model. The Pages Router is legacy at this point.
Structure Your Project Early
The folder structure you choose on day one will haunt you or serve you for years. We use a strict separation of app routes, components, lib utilities, and constants. Every team member knows exactly where everything lives.
Server Components First
Default to Server Components. Only reach for Client Components when you need interactivity, browser APIs, or state. This keeps your bundle small and your pages fast.
Handle Auth Properly
Authentication in SaaS is critical. We use NextAuth.js with a database adapter for most projects. Never roll your own auth — the edge cases will get you.
Optimize For Core Web Vitals From Day One
LCP, FID, and CLS directly affect your Google ranking. Use Next.js Image for all images, minimize client-side JavaScript, and test with Lighthouse regularly.
These practices have saved us and our clients enormous amounts of time and money. If you are building a SaaS and want it done right from the start, reach out to Strayks.