React vs Relay: What are the differences?
Developers describe React as "A JavaScript library for building user interfaces". Lots of people use React as the V in MVC. Since React makes no assumptions about the rest of your technology stack, it's easy to try it out on a small feature in an existing project. On the other hand, Relay is detailed as "A JavaScript Framework for Building Data-Driven React Applications, by Facebook". Never again communicate with your data store using an imperative API. Simply declare your data requirements using GraphQL and let Relay figure out how and when to fetch your data.
React and Relay can be primarily classified as "Javascript UI Libraries" tools.
React and Relay are both open source tools. It seems that React with 132K GitHub stars and 24.5K forks on GitHub has more adoption than Relay with 13.1K GitHub stars and 1.29K GitHub forks.
Airbnb, Uber Technologies, and Facebook are some of the popular companies that use React, whereas Relay is used by Facebook, ZeeMee, and Flexport. React has a broader approval, being mentioned in 3223 company stacks & 3085 developers stacks; compared to Relay, which is listed in 39 company stacks and 7 developer stacks.