Colossus vs Falcon: What are the differences?

What is Colossus? I/O and Microservice library for Scala. Colossus is a lightweight framework for building high-performance applications in Scala that require non-blocking network I/O. In particular Colossus is focused on low-latency stateless microservices where often the service is little more than an abstraction over a database and/or cache. For this use case, Colossus aims to maximize performance while keeping the interface clean and concise.

What is Falcon? High-performance Python framework for building cloud APIs and web app backends. Falcon is a minimalist WSGI library for building speedy web APIs and app backends. We like to think of Falcon as the Dieter Rams of web frameworks.

Colossus and Falcon can be categorized as "Microframeworks (Backend)" tools.

Some of the features offered by Colossus are:

• Clean Event-based Programming
• Seamless Integration with Akka
• Real-time Metrics

On the other hand, Falcon provides the following key features:

• Intuitive routing via URI templates and resource classes
• Easy access to headers and bodies through request and response classes
• Idiomatic HTTP error responses via a handy exception base class

Colossus and Falcon are both open source tools. Falcon with 6.8K GitHub stars and 707 forks on GitHub appears to be more popular than Colossus with 1.14K GitHub stars and 100 GitHub forks.