NextUpKit
NextUpKit is a comprehensive, open-source starter kit designed to accelerate the development of Next.js SaaS applications. It includes pre-configured integrations for authentication via NextAuth, payment processing with LemonSqueezy, and database management using MongoDB. The boilerplate also features a responsive design built with Tailwind CSS and shadcn UI, along with built-in support for transactional emails, analytics, and live chat functionality.
Checked on Sep 30, 2026.
Alternative resources
Open Source Boilerplates
A curated directory of open-source starter kits and boilerplates for web, mobile, and backend application development.
Payload
An open-source, code-first headless CMS and application framework built for Next.js, offering schema definition in code and flexible data management.
HTML5 UP
A collection of free, fully responsive site templates built with HTML5 and CSS3.