| title | Azure SignalR Service limits table |
|---|---|
| description | Describes system limits for Azure SignalR Service. |
| services | signalr |
| author | sffamily |
| manager | cfowler |
| ms.service | azure-signalr-service |
| ms.topic | include |
| ms.date | 12/20/2023 |
| ms.author | zhshang |
| Resource | Default limit | Maximum limit |
|---|---|---|
| Azure SignalR Service units per instance for Free tier | 1 | 1 |
| Azure SignalR Service units per instance for Standard/Premium_P1 tier | 100 | 100 |
| Azure SignalR Service units per instance for Premium_P2 tier | 100 - 1,000 | 100 - 1,000 |
| Azure SignalR Service units per subscription per region for Free tier | 5 | 5 |
| Total Azure SignalR Service unit counts per subscription per region | 150 | Unlimited |
| Concurrent connections per unit for Free tier | 20 | 20 |
| Concurrent connections per unit for Standard/Premium tier | 1,000 | 1,000 |
| Included messages per unit per day for Free tier | 20,000 | 20,000 |
| Additional messages per unit per day for Free tier | 0 | 0 |
| Included messages per unit per day for Standard/Premium tier | 1,000,000 | 1,000,000 |
| Additional messages per unit per day for Standard/Premium tier | Unlimited | Unlimited |
To request an update to your subscription's default limits, open a support ticket.
For more information about how connections and messages are counted, see Messages and connections in Azure SignalR Service.
If your requirements exceed the limits, switch from Free tier to Standard tier and add units. For more information, see How to scale an Azure SignalR Service instance?
If your requirements exceed the limits of a single instance, add instances. For more information, see How to enable Geo-Replication in Azure SignalR Service.