American cloud-based software company Salesforce acquired Slack in a $27.7-billion deal in the biggest acquisition in its 21-year history. In 2019, Salesforce bought data visualisation company Tableau for $15.7 billion, and in 2018, it bought software maker MuleSoft for $6.5 billion. In 2016, Salesforce bought Demandware, a cloud-based provider of e-commerce services, for $2.8 billion.