The Gunicorn "Green Unicorn" (pronounced jee-unicorn or gun-i-corn)[2] is a Python Web Server Gateway Interface (WSGI) HTTP server.

It is a pre-fork worker model, ported from Ruby's Unicorn project.

The Gunicorn server is broadly compatible with a number of web frameworks, simply implemented, light on server resources and fairly fast.

[3] It is often paired with Nginx, as the two have complementary features.

[4] Server model[5] [citation needed] This article incorporates text available under the CC BY 3.0 license.