What data sources can users connect to Fusion?

Lucidworks Fusion offers more than 100 connectors to a variety of data sources, including: Salesforce, Sharepoint, Google Drive, Slack, ServiceNow, Amazon S3, Box.com, MongoDB, Oracle, MySQL and others. Fusion also provides a Connectors SDK. This scalable, extensible framework gives data engineers and system architects the capability to build custom connectors that allow any data source, regardless of the complexity of the content and security API, to be indexed into the system while respecting data access rights. https://doc.lucidworks.com/fusion-server/4.2/search-development/getting-data-in/connectors/index.html