Mulesoft is an integration platform that allows applications to connect and exchange data through its lightweight Java-based ESB. It supports over 120 pre-built connectors for packaged and cloud applications as well as custom connectors. Mulesoft provides capabilities beyond just integration such as service creation, mediation between services, message routing, and data transformation across various formats and protocols. Connectors that are not included can be searched for on Anypoint Exchange and added if available.