Slack is an AI-powered workplace collaboration platform that was co-founded by Stewart Butterfield, Cal Henderson, Eric Costello, and Serguei Mourachov, emerging from an internal chat tool built during development of the online game Glitch. Slack's Twitter Score is 101 out of 1000 (an Excellent rating) as of September 2026, ranking #7,054 (top 5%) among 486,573 tracked accounts.
Slack was founded in 2014 after the co-founders of Tiny Speck repurposed that internal messaging tool for broader workplace use. Salesforce completed its acquisition of Slack Technologies, Inc. on July 21, 2021, making Salesforce the parent company of the platform. Slack has 434,680 followers as of September 2026 on Twitter and has published 307,636 posts.
Slack operates the Slack Fund, a venture capital fund that invests in and collaborates with entrepreneurs building software companies. Slack's platform usage guidelines explicitly prohibit applications from mining cryptocurrency or demonstrating proof of work for any blockchain network, including Bitcoin. Slack has been mentioned by 2,246 accounts, with 8,598 total mentions.
Who follows Slack on X?
The accounts that follow Slack include 502 founders, 146 angel investors, 84 influencers and 67 VCs, among them Balaji, SBF, David Sacks, Udi Wertheimer, Alexis Ohanian and Jeremy Allaire - jerallaire.arc.