Startup/side project Slack channels to join?

Hey! What are your favorite Slack channels about startups/side projects? I'm looking for vibrant startup communities to join.

I can recommend GenZ VCs Slack: https://join.slack.com/t/genz-vcs/shared_invite/zt-y2g6yxvq-xWnSM~pgsfXbpnJ60MMd~g

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