MEAN Stack (MongoDB, Express, Angular, Node.js) overview

The MEAN stack combines MongoDB for document storage, Express as the Node.js web framework, Angular for the single-page application frontend, and Node.js as the runtime. Like MERN, it is an all-JavaScript stack, but Angular's opinionated structure—modules, services, dependency injection, RxJS—makes it a stronger fit for large enterprise teams. TypeScript is the first-class language across all layers. Angular CLI scaffolds and builds the frontend; NestJS or plain Express handles the API. MongoDB Atlas provides cloud hosting for the database. The stack is common in enterprise line-of-business applications where Angular's conventions reduce the decision surface.