Slack Opens to the Public

Setting the scene

Tiny Speck had built Glitch, an MMO that failed commercially but left behind communication tools the team liked using. Repackaging that code as Slack turned a pivot into a growth story investors loved.

What happened

Channel-based threading split topics without forcing everyone into one noisy email chain. App directories let startups plug CRM tickets, CI alerts, and lunch polls into the same pane of glass.

Why it still matters

Enterprise buyers later demanded retention, e-discovery, and compliance tooling Slack had to bolt on quickly. Memorable detail: custom emoji culture turned workplaces into inside-joke museums visible only to those in the workspace.

Background

Slack helped normalize always-on team chatter and slash-command bots, influencing Microsoft Teams and Discord design patterns.