What are some alternatives?
When comparing NServiceBus and Gunicorn, you can also consider the following products
IBM App Connect - IBM App Connect is the all-in-one integration tool for connecting apps, integrating data, building APIs and acting on events
Microsoft IIS - Internet Information Services is a web server for Microsoft Windows
Apache Camel - Apache Camel is a versatile open-source integration framework based on known enterprise integration patterns.
Apache Tomcat - An open source software implementation of the Java Servlet and JavaServer Pages technologies
Software AG webMethods - Software AG’s webMethods enables you to quickly integrate systems, partners, data, devices and SaaS applications
LiteSpeed Web Server - LiteSpeed Web Server (LSWS) is a high-performance Apache drop-in replacement.