gunicorn

What it is

Gunicorn is a pre-fork worker model Python HTTP server that is ported from Ruby's Unicorn project. It is designed to be used in production environments and supports various deployment scenarios, including load balancing and SSL termination.

Gunicorn stands out as a robust, pre-fork worker model Python HTTP server designed for production environments with support for load balancing and SSL termination.

When it fits — and when it doesn’t

Known weaknesses

Each one links to the public issue, changelog or docs page it came from, where we have one.

1. 01

   Steep learning curve for non-Python developers

   Gunicorn's configuration and usage patterns are deeply rooted in Python, requiring a solid understanding of the language to effectively utilize its features.

2. 02

   Limited out-of-the-box support for modern deployment practices

   Gunicorn does not natively support modern orchestration tools like Kubernetes without additional configuration and integration, which can be cumbersome.

3. 03

   Performance limitations under high concurrency

   As a pre-fork worker model server, Gunicorn's performance may degrade under extremely high concurrency scenarios compared to asynchronous servers like uWSGI or Tornado.

4. 04

   Configuration complexity for advanced use cases

   Setting up advanced features such as SSL termination and load balancing requires a deep understanding of Gunicorn's configuration options, which can be overwhelming for new users.

What it does well

• Pre-fork worker model for handling requests

• Supports various deployment scenarios including load balancing and SSL termination

• Configurable to work with different types of applications

Pricing

Free tier

YesOpen source — free to use

Paid from

$0

Model

Flat rate

Enterprise plan

No

Pricing not independently confirmed — check the vendor’s page.