The present disclosure is related to systems, methods, and non-transitory machine readable media for alerting with duplicate suppression. An example non-transitory machine readable medium can store instructions executable by a processing resource to cause a computing system to receive an alert at a first virtual computing instance (VCI) from a second VCI, compare the alert with at least one previously received alert to determine if the alert is a duplicate alert, and send the alert to an alert notification queue associated with the first VCI in response to a determination that the alert is not a duplicate alert. In some embodiments, the medium can store instructions to confirm that the alert has been sent in response to the determination that the alert is a duplicate alert.