These slides use concepts from my (Jeff Funk) course entitled Biz Models for Hi-Tech Products to analyze the business model for Slack, a supplier of collaborative tools for teams. These tools offer a new form of mail service that is very different from that of traditional e-mail programs such as Microsoft Outlook, G-Mail, and Yahoo-Mail. Slack designed its mail service for the cloud computing environment, as opposed to the traditional in-house computing environment. Accessing documents from the cloud is easier with Slack’s service than with Microsoft Outlook as is enabling apps for Slack’s service and reading messages. Reading messages is easier because they are organized by person (like instant messaging on smart phones) as opposed to time. By measuring usage, Slack can charge by active user thus reducing the risk of trying Slack, particularly for individuals, who are the main market for Slack. These slides describe the value proposition, customers, method of value capture, scope of activities and the method of strategic control for Slack.