Angular is a comprehensive frontend framework (not just a library like React) — it includes everything needed for enterprise applications: TypeScript by default, dependency injection for testable architecture, RxJS for reactive data handling, Angular Router for navigation, Angular Forms (template-driven and reactive), HttpClient for API communication, and Angular CLI for scaffolding, building, and testing.
Choose Angular when: your team prefers opinionated frameworks with built-in patterns, you need complex forms with validation, your application has heavy reactive data flows (RxJS), or you're building large applications where Angular's strict structure prevents architectural drift. Choose React when: you prefer flexibility, need server-side rendering (Next.js), or your team has React experience.