Nextstarter is a comprehensive Next.js template designed to help you quickly build and launch your SaaS, AI tool, or any web application to start generating revenue online. It features integration with Stripe and LemonSqueezy for creating checkout sessions and handling webhooks to update user accounts for subscriptions and one-time payments. The template provides tips to set up your account and reduce churn, supports magic sign-in/sign-up links, and includes a step-by-step guide for Google login. You can store user data using MongoDB or Supabase, and it offers a complete blog framework to enhance your content strategy. With comprehensive meta tags for SEO optimization on Google, Nextstarter also supports schemas in Mongoose and tables in Postgres, giving you flexibility in database management.