Apollo vs Socket.IO: What are the differences?
Apollo: GraphQL server for Express, Connect, Hapi, Koa and more. Build a universal GraphQL API on top of your existing REST APIs, so you can ship new application features fast without waiting on backend changes; Socket.IO: Realtime application framework (Node.JS server). Socket.IO enables real-time bidirectional event-based communication. It works on every platform, browser or device, focusing equally on reliability and speed.
Apollo belongs to "Platform as a Service" category of the tech stack, while Socket.IO can be primarily classified under "Realtime Backend / API".
"From the creators of Meteor" is the top reason why over 8 developers like Apollo, while over 186 developers mention "Real-time" as the leading cause for choosing Socket.IO.
Apollo and Socket.IO are both open source tools. It seems that Socket.IO with 46.7K GitHub stars and 8.53K forks on GitHub has more adoption than Apollo with 7.4K GitHub stars and 911 GitHub forks.
PedidosYa, Trello, and triGo GmbH are some of the popular companies that use Socket.IO, whereas Apollo is used by Impraise, Swat.io, and Policygenius. Socket.IO has a broader approval, being mentioned in 555 company stacks & 385 developers stacks; compared to Apollo, which is listed in 123 company stacks and 121 developer stacks.