Supastarter, a practical SaaS starter kit, provides necessary functionality required to construct a SaaS, thus allowing you to concentrate on your primary business. Packed with Next.js 14 and new app router, it ensures scalability and readiness for production. The kit leverages Lucia Auth for authentication, imparting full control over user data and flexibility in authentication flow customization.

Billing and subscriptions are well-managed through Lemonsqueezy and Stripe, both completely integrated and easy to use. Supastarter also features AI integration utilizing Vercel’s AI SDK and offers assistance with internationalization to make the app universally accessible. The UI is customizable with built-in dark mode and adaptable to match your brand style.

There's an integrated selection for databases via Prisma. Finally, the kit includes a mail feature with ready-to-use email templates and an adaptable API layer via trpc for mobile or desktop apps.\n\nSupastarter aims to maximize productivity and efficiency by providing common functionality that all SaaS require, allowing developers to solely concentrate on their core business.

Whether it’s a small project or an extensive SaaS platform for large user base, Supastarter provides a solid foundation for your next project.

Supastarter is built upon the capabilities of Next.js 14 with app router ensuring quick and nested routing through React server components. Multi-option authentication with Lucia Auth offers an ensured and controlled methodology.\n\nBilling services included are Lemonsqueezy and Stripe, to manage user subscriptions.

An AI extension based on Vercel’s AI SDK, is built-in and needs API keys to get started. Internationalization support available in English and German, extending support to any language as needed.\n\nThe UI is modern and fully customizable with Tailwind CSS, Radix UI, built-in dark mode. Compatible with shadcnUI and can be styled as per the brand requirement.

Database of choice supported through Prisma, allowing schema migrations with ease. Customized API with type-safe layers, reusable, adaptable for mobile, desktop app or customer-facing API, using tRPC, is included. The mailing feature comprises multiple mail provider integrations and ready-to-use email templates.