Key Features
What makes a hosting environment good for Blazor Server
- Real-Time Updates — SignalR over native IIS 10 WebSockets for instant UI updates, with Long Polling fallback for restrictive networks
- Server-Side Security — Application logic stays on the server; the browser only renders UI diffs over the SignalR circuit
- Circuit Management — Configurable disconnect / reconnect windows, automatic circuit cleanup on idle, and clear visibility into circuit count
- Multi-Server Scale-Out — Redis backplane or Azure SignalR Service supported for horizontal scaling beyond single-plan limits
SignalR-Optimized Infrastructure
Tuned for persistent WebSocket connections
- Connection Pooling — Efficiently manages client-server SignalR circuits in the IIS worker process
- Redis Backplane Support — Scale Blazor Server across multiple plans/servers via Redis
- WebSocket Tuning — Network settings tuned for persistent connections (keepalive, longer idle timeouts than typical request workloads)
- Adaptive Circuit Management — Automatic resource adjustment based on concurrent circuit count
Approximate concurrent circuit capacity: Developer ~75 circuits, Business ~150-200, Professional ~300+. Each circuit uses ~250 KB of server RAM.
Complete Blazor Support
Switch render modes without switching plans
- Blazor Server — Server-side UI rendering with persistent SignalR connections
- Blazor WebAssembly — Client-side Blazor running in the browser via WebAssembly, no SignalR dependency
- Blazor Auto & Static SSR — .NET 8+ unified render modes with prerendering support
Documentation & Microsoft Resources
- Host and deploy Blazor Server — Microsoft official
- SignalR introduction — Microsoft official SignalR docs
- Blazor SignalR guidance — Microsoft official
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