Real-time ASP.NET with SignalR
Incredibly simple real-time web for ASP.NET
Supported on Windows, Linux, and macOS
Bring your ASP.NET apps to life with SignalR
Today's modern apps are expected to deliver up-to-date information without hitting a refresh button. Add real-time functionality to your dashboards, maps, games and more.
What is real-time functionality? It's the ability to have your server-side code push content to connected clients as it happens, in real-time.
Part of the ASP.NET Framework
SignalR hubs can be written in C# code and added to your ASP.NET app, alongside your pages and APIs.
The simple programming model integrates seamlessly with other ASP.NET features like dependency injection, authentication, authorization, and scalability.
What can you do with ASP.NET and SignalR?
While chat is often used as an example, you can do a whole lot more. Any time a user refreshes a web page to see new data, or the page implements Ajax long polling to retrieve new data, it's a candidate for using SignalR.
SignalR also enables completely new types of applications that require high-frequency updates from the server, such as real-time gaming.
Open source, open protocol
SignalR is open-source on GitHub, just like the rest of .NET. In addition to the source code, the protocol specification for communication between hubs and clients is open too.
Connect from everywhere
With client SDKs for JavaScript, .NET (C#, F#, and Visual Basic), Java, and Swift, you can connect to your SignalR hub and start receiving real-time messages on almost any platform including web, mobile, desktop, and games.
SignalR will use WebSockets when it's available, and gracefully falls back on other technologies when it isn't, while your application code stays the same.
SignalR is fast and scalable
Like the rest of ASP.NET, SignalR was built for high performance and is one of the fastest real-time frameworks around.
Scale out across servers with built-in support for using Redis, SQL Server, or Azure Service Bus to coordinate messages between each instance.
Azure SignalR service
You can host the SignalR app yourself or use Azure SignalR Service for a fully managed platform. Azure SignalR Service handles concerns like performance, scalability, and availability and has a 99.9% service-level agreement.
Ready to get started?
Our step-by-step tutorial will help you get ASP.NET with SignalR running on your computer.