Makerkit is a multi-framework SaaS starter kit that provides a complete set of features to help developers quickly build and launch SaaS products. It lets you build in your favourite tech stack combos: Next.js + Firebase, Next.js + Supabase V2 (Turbo), React Native (Expo) + Supabase, React Router 7 + Supabase, Remix + Supabase V2 (Turbo). It includes pre-built components for authentication, payments, multi-tenancy, admin panels, and more.