Slack Fund, Haystack and CRV invest $4 million in Parabol, the meta-meeting software toolkitTechCrunch • 11/05/19
Microsoft Teams-Slack rivalry heats up as CEOs brag about their collaboration toolsGeekWire • 10/24/19
Are Options Traders Betting on a Big Move in Slack Technologies (WORK) Stock?Zacks Investment Research • 10/17/19
Slack hits 12M daily users — here’s how that compares to Microsoft Teams and other rivalsGeekWire • 10/11/19