SaaSFly

Saasfly is a free and open-source Next.js SaaS boilerplate designed to help you build SaaS applications quickly and easily.

For authentication, it integrates NextAuth.js, providing seamless support for social logins like Google and GitHub.

It uses Prisma as its ORM to manage databases, such as PostgreSQL, making database operations smooth and efficient. For crafting beautiful emails, Saasfly leverages React Email, enabling you to design emails using React components, with support for Resend to handle the actual email sending.

When it comes to payments, Saasfly implements Stripe, which is the de facto standard for payment processing in web applications.

For the user interface, Saasfly relies on Tailwind CSS, a utility-first CSS framework that allows for rapid UI development. It also integrates shadcn/ui for reusable components built with Radix UI and Tailwind CSS, alongside modern Lucide icons for an updated look.

Saasfly comes with support for internationalization (i18n), enabling you to localize your application for different regions and languages.

You can write content in MDX format, which is particularly useful for creating blog posts or documentation.

The framework also supports a table of contents, beautiful code blocks powered by rehype-pretty-code, and syntax highlighting using Shiki.

While Saasfly seems to be maintained, updates are not frequent—its last update was about two months ago. The documentation isn’t extensive, so you may need to dive into the code to fully understand how to use and customize it for your needs.