Question: Is there a Next.js starter kit that comes with pre-built features like authentication, payments, and landing pages?

The first one, Staarter, is a Next.js SaaS boilerplate that gets you up and running faster with a lot of core features already set up. That includes robust authentication and authorization, subscriptions that can be managed with Stripe, Paddle or LemonSqueezy, and full localization support. Other features include an easy-to-use admin dashboard, modern stack, type-safe API, code generators and serious security, all for a single lifetime access price of $399.

Another option is SaaS AI, which is geared for AI-powered web app development. It includes AI integration with several AI services, Supabase-based user authentication, Stripe-based subscription management and an SEO-optimized landing page. SaaS AI also includes tools for sending emails, analytics, file storage and customer support through Crisp, and offers Pro and Starter versions for different needs and budgets.

For something more general purpose, SaaSBold is a full-stack, production-ready SaaS boilerplate built on Next.js, React and Node.js. It includes payment and subscription management with Stripe and LemonSqueezy, integration with OpenAI SDK for AI, transactional emails, admin and user dashboards and internationalization. The boilerplate also supports SEO and performance optimization and comes with premium features like editable Figma design source files and lifetime free updates.