Introduction Gunicorn, short for “Green Unicorn,” is a Python Web Server Gateway Interface (WSGI) HTTP server. It is a pre-fork worker model server that provides a high level of performance and reliability for Python web applications. Gunicorn is a popular choice for Python web applications because of its ease of use, speed, and scalability. Installation and Configuration Gunicorn can be installed easily with pip, the Python package manager. Once installed, you can run a simple web application by specifying the name of the module containing the application and the name of the application object.