Out of the box, Progress Sitefinity CMS supports three search services: Azure Cognitive Search service, Elasticsearch service, and Lucene.NET. By default, the Sitefinity CMS utilizes Lucene, however, users are able to switch between search services and/or adjust the settings as preferred. According to Sitefinity support documents, all three search services perform quickly, returning results within 0.5 seconds even with high load volume.