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Original author(s)Benoit Chesneau
Developer(s)Gunicorn Developers
Initial release20 February 2010; 12 years ago (2010-02-20)
Stable release
20.1.0[1] Edit this on Wikidata / 28 April 2021; 19 months ago (28 April 2021)
Written inPython
Operating systemCross-platform
TypeWeb server
LicenseMIT License Edit this at Wikidata
Benoit Chesneau, author of Gunicorn

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]

  • Central master process to manage the workers
  • Requests are handled by worker processes
  • Components:
    • Master
    • Sync workers
    • Async workers
    • Tornado workers
    • AsyncIO workers


[citation needed]

  • Natively supports WSGI, web2py, Django and Paster
  • Automatic worker process management
  • Simple Python configuration
  • Multiple worker configurations
  • Various server hooks for extensibility
  • Compatible with Python 2.6+ and Python 3.2+[6]

See also[edit]


  1. ^ "Release 20.1.0". 28 April 2021. Retrieved 14 May 2021.
  2. ^ "Ambiguous Pronunciation · Issue #139 · benoitc/gunicorn". GitHub. Retrieved 2018-08-02.
  3. ^ Gunicorn-Python WSGI HTTP Server for UNIX
  4. ^ Gunicorn and Nginx in a Nutshell
  5. ^ "Design — Gunicorn 20.1.0 documentation".
  6. ^ Gunicorn 19.3 Documentation: Requirements

External links[edit]

 This article incorporates text available under the CC BY 3.0 license.