Gunicorn

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Gunicorn 'Green Unicorn' is a Python WSGI HTTP Server for UNIX. It's a pre-fork worker model ported from Ruby's Unicorn project. The Gunicorn server is broadly compatible with various web frameworks, simply implemented, light on server resource usage, and fairly speedy.

New in v25: Per-app worker allocation for dirty arbiters, HTTP/2 support (beta)!

Quick Start

pip install gunicorn
gunicorn myapp:app --workers 4

For ASGI applications (FastAPI, Starlette):

gunicorn myapp:app --worker-class asgi

Features

WSGI support for Django, Flask, Pyramid, and any WSGI framework
ASGI support for FastAPI, Starlette, Quart
HTTP/2 support (beta) with multiplexed streams
Dirty Arbiters (beta) for heavy workloads (ML models, long-running tasks)
uWSGI binary protocol for nginx integration
Multiple worker types: sync, gthread, gevent, eventlet, asgi
Graceful worker process management
Compatible with Python 3.9+

Documentation

Full documentation at https://gunicorn.org

Community

Report bugs on GitHub Issues
Chat in #gunicorn on Libera.chat
See CONTRIBUTING.md for contribution guidelines

Support

Powering Python apps since 2010. Support continued development.

License

Gunicorn is released under the MIT License. See the LICENSE file for details.

gunicorn

Description