Slack adds Actions feature for deep integrations
Slack has introduced a new feature called "actions," which takes Slack's existing third-party app integrations to the next level. It lets developers hook their apps even deeper into the chat service so you can do more without ever leaving the app. Instead of the automated experiences developers can create now, actions lets you start using outside services directly from Slack messages. If your company uses the task management software Asana, for example, you can create and assign a new task right from your chats. Or, if you use Zendesk, you can create support tickets directly form a message.
Slack alternatives are: Microsoft Teams, Flowdock, Yammer, Basecamp, Skype, Asana, Google Hangouts, Salesforce