Flask Framework is described as 'Flask is a lightweight web application framework written in Python and based on the Werkzeug WSGI toolkit and Jinja2 template engine. There is no database abstraction layer, form validation, or any other components where third-party libraries already exist to provide common' and is a Web Framework in the development category. There are more than 10 alternatives to Flask Framework for a variety of platforms, including Linux, Windows, Mac, Self-Hosted and Python apps. The best Flask Framework alternative is Django, which is both free and Open Source. Other great apps like Flask Framework are FastAPI, ASP.NET, Frappe Framework and Reflex Framework.