Nexus — SaaS Starter Kit

Nexus is the SaaS foundation we wished existed: sign-in, organisations, seat-based Stripe billing, transactional email, an admin console and a marketing site — all in one Next.js 16 App Router project with no dead code to delete.

What makes it different

• Authentication & roles — Email, OAuth and magic-link sign-in with sessions, protected routes and role-based access control.
• Subscription billing — Stripe checkout, customer portal, webhooks, plan gating and invoice history wired end to end.
• Server components by default — Data fetching happens on the server, so pages ship almost no JavaScript and stay fast on mid-range phones.
• SEO already implemented — Per-route metadata, canonical URLs, XML sitemap, robots rules, JSON-LD structured data and dynamic Open Graph images.
• Token-based theming — Every colour, radius and shadow is a CSS variable. Rebrand the whole product by editing one file.
• Tests included — Unit tests for the business logic and Playwright end-to-end tests covering the critical flows.

Who it's for

Founders and small teams launching a subscription product who want to spend week one on their actual feature, not on billing webhooks.

Built with

Next.js 16 · React 19 · TypeScript · Tailwind CSS v4 · Prisma · PostgreSQL · Stripe · Resend

In the download

• Full Next.js source code (TypeScript)
• Figma design file
• Tailwind CSS design tokens
• Written documentation
• One-click deploy config

Updates and support

Framework upgrades and bug fixes are free for as long as this product exists. Support is included for 6 months with a Regular license and 12 months with an Extended one, and can be extended at any time.