Azure Event Grid quotas and limits

This article lists quotas and limits in Azure Event Grid.

Quotas and limits

The following limits apply to Azure Event Grid topics (system, custom, and partner topics).

Resource Limit
Custom topics per Azure subscription 100
Event subscriptions per topic 500
Publish rate for a custom or a partner topic (ingress) 5,000 events/sec or 5 MB/sec (whichever is met first)
Event size 1 MB
Private endpoint connections per topic 64
IP Firewall rules per topic 16

The following limits apply to Azure Event Grid domains.

Resource Limit
Topics per event domain 100,000
Event subscriptions per topic within a domain 500
Domain scope event subscriptions 50
Publish rate for an event domain (ingress) 5,000 events/sec or 5 MB/sec (whichever is met first)
Event Domains per Azure Subscription 100
Private endpoint connections per domain 64
IP Firewall rules per domain 16

Next steps

See Azure subscription and service limits, quotas, and constraints for quotas and limits of all Azure services.