Discord. It was made mainly for games and it has exploded the last few years for pretty much about everything. I was introduced to Slack because the programming

Discord. It was made mainly for games and it has exploded the last few years for pretty much about everything. I was introduced to Slack because the programming language I was using had its official channel there. They had also an irc channel but people were not willing to use it. Then I made a discord server mainly because I was using Discord for Unreal Engine , which has to this day the most active community there according to my experience. Without me realizing it the main dev of the language I was using abandoned Slack and used my Discord server. I made him admin and the rest of the community reluctantly followed cause being coders saw no point using a game orientated chat client but a year later not only the Slack server was almost completely abandoned but not one even mentioned Slack or IRC.