SmartStack vs Libraries.io: What are the differences?

SmartStack: Automated service discovery and registration framework. Scaling a web infrastructure requires services, and building a service-oriented infrastructure is hard. Make it EASY, with SmartStack’s automated, transparent service discovery and registration: cruise control for your distributed infrastructure; Libraries.io: Discover open source packages, modules and frameworks you can use in your code. It is an open source web service that lists software development project dependencies and alerts developers to new versions of the software libraries they are using.

SmartStack and Libraries.io can be primarily classified as "Open Source Service Discovery" tools.

SmartStack is an open source tool with 232 GitHub stars and 41 GitHub forks. Here's a link to SmartStack's open source repository on GitHub.