Gunicorn runs Django, Flask, and other WSGI apps behind nginxA high-performance web server and reverse proxy — event-driven design for massive concurrency. or a load balancer — worker processes handle requests while a master manages lifecycle. It ported RubyA dynamic language emphasizing developer happiness — Rails made it the default for web startups in the 2000s.'s Unicorn model to PythonA high-level language known for readability — dominant in data science, scripting, and web backends. with simple configuration. Example: `gunicorn myapp.wsgi:application --workers 4` serves a Django APIApplication programming interface — a defined way for programs to talk to each other or to a service. on port 8000.

Gunicorn became the default production WSGI server for PythonA high-level language known for readability — dominant in data science, scripting, and web backends. web frameworks.

It made deploying PythonA high-level language known for readability — dominant in data science, scripting, and web backends. apps behind nginxA high-performance web server and reverse proxy — event-driven design for massive concurrency. a standard, well-understood pattern.