SignalR vs Simperium: What are the differences?
Developers describe SignalR as "A new library for ASP.NET developers that makes developing real-time web functionality easy". SignalR allows bi-directional communication between server and client. Servers can now push content to connected clients instantly as it becomes available. SignalR supports Web Sockets, and falls back to other compatible techniques for older browsers. SignalR includes APIs for connection management (for instance, connect and disconnect events), grouping connections, and authorization. On the other hand, Simperium is detailed as "Move data everywhere it's needed, instantly and automatically". Simperium is a new kind of data layer. As your app reads and writes data, Simperium circulates that data everywhere it's needed. You add a Simperium library to your app and initialize it. This library keeps a persistent connection to the Simperium hosted service. The Simperium libraries and service work together to efficiently move data around for your users.
SignalR and Simperium belong to "Realtime Backend / API" category of the tech stack.
"Supports .NET server" is the primary reason why developers consider SignalR over the competitors, whereas "Simple and useful data model" was stated as the key factor in picking Simperium.
SignalR is an open source tool with 7.75K GitHub stars and 2.19K GitHub forks. Here's a link to SignalR's open source repository on GitHub.