.NET Core vs Vert.x: What are the differences?
.NET Core: An Open Source, General-Purpose Development Platform Maintained by Microsoft and the .NET Community. Cross-platform (supporting Windows, macOS, and Linux) and can be used to build device, cloud, and IoT applications; Vert.x: A tool-kit for building reactive applications on the JVM. It is event driven and non blocking application framework. This means your app can handle a lot of concurrency using a small number of kernel threads. It lets your app scale with minimal hardware.
.NET Core and Vert.x can be categorized as "Frameworks (Full Stack)" tools.
.NET Core is an open source tool with 11.2K GitHub stars and 2.41K GitHub forks. Here's a link to .NET Core's open source repository on GitHub.
According to the StackShare community, .NET Core has a broader approval, being mentioned in 54 company stacks & 71 developers stacks; compared to Vert.x, which is listed in 20 company stacks and 5 developer stacks.