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Gunicorn is maintained by volunteers. If it powers your production, please consider supporting us:

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

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

pip install gunicorngunicorn myapp:app --workers 4

For ASGI applications (FastAPI, Starlette):

gunicorn myapp:app --worker-class asgi

• WSGI support for Django, Flask, Pyramid, and any WSGI framework
• ASGI support (beta) for FastAPI, Starlette, Quart
• HTTP/2 support (beta) with multiplexed streams
• Dirty Arbiters 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+

Full documentation athttps://gunicorn.org

• Quickstart
• Configuration
• Deployment
• Settings Reference

• Report bugs onGitHub Issues
• Chat in#gunicorn onLibera.chat
• SeeCONTRIBUTING.md for contribution guidelines

Powering Python apps since 2010. Support continued development.

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