diamondhill.app

One foundation.
Many products.

Diamond Hill is the shared platform powering a suite of digital products — a Turborepo monorepo with common packages for auth, email, blog, UI, and data.

7 products running

Built with

Next.js 15

App Router, Server Components, Server Actions

Turborepo

Monorepo build system with shared packages

TypeScript

Strict typing across every app

Tailwind CSS

Utility-first styling, per-app design systems

Neon PostgreSQL

Serverless Postgres, one project per app

Vercel

Deployment, previews, and edge infrastructure

Resend

Transactional email across all products

next-auth v5

Auth with JWT sessions and credential providers