Salesforce is a cloud-based customer relationship management (CRM) platform that offers various products and services including Sales Cloud, Service Cloud, and Marketing Cloud. It was founded in 1999 by Marc Benioff and is headquartered in San Francisco. Salesforce provides a complete CRM solution for marketing, sales, services, and other functions. It uses a software-as-a-service model and is accessible via the cloud, with no on-premise software required.