A data source is identified that includes transaction data describing a set of transactions involving a particular software component and each transaction in the set of transactions includes a request and a corresponding response to the request. In some aspects, a modification to the data source is detected and the service model is caused to be generated based on detecting the modification. The service model is to model responses of the particular software component to requests in transactions based at least in part on the transaction data. A virtual service is caused to be generated based on the service model. The resulting virtual service can be configured to receive requests and generate virtual responses to the requests based on the service model to simulate responses of the particular software component.