Grizzly vs NestJS: What are the differences?
Developers describe Grizzly as "A framework for building scalable server applications". Writing scalable server applications in the Java™ programming language has always been difficult. Before its advent, thread management issues made it impossible for a server to scale to thousands of users. This framework has been designed to help developers to take advantage of the Java™ NIO API. On the other hand, NestJS is detailed as "A progressive Node.js framework for building efficient and scalable server-side applications by @kammysliwiec". Nest is a framework for building efficient, scalable Node.js server-side applications. It uses progressive JavaScript, is built with TypeScript (preserves compatibility with pure JavaScript) and combines elements of OOP (Object Oriented Programming), FP (Functional Programming), and FRP (Functional Reactive Programming)
Under the hood, Nest makes use of Express, but also, provides compatibility with a wide range of other libraries, like e.g. Fastify, allowing for easy use of the myriad third-party plugins which are available..
Grizzly and NestJS can be categorized as "Frameworks (Full Stack)" tools.
NestJS is an open source tool with 18.3K GitHub stars and 1.31K GitHub forks. Here's a link to NestJS's open source repository on GitHub.