Technologies are generally provided for reactive loop sensing in multi-datacenter deployments. In some examples, tagged metrics from deployment elements on different datacenter or platform providers may be used by a stability module to generate a synthetic generalized deployment model that aliases multiple system elements into general state vectors. The state vectors may include a transfer vector on the border between each datacenter or platform, and the feedback from the metrics may cause the states of the datacenters/platforms to match the deployment's unobserved variables allowing stability analysis before failure. For example, the metrics may be associated with a portion of the deployment on one of the multiple datacenters. The stability analysis module may compare the received metrics with model metrics derived from a model of the multi-datacenter deployment to determine the stability of the deployment and/or adjust the model for increased stability.