Geneva has this - it's like Slack with a built in paid subscription management system. Only available to select groups right now, but if you or your colleague email me (sam@genevachat.com) I can show you more / get you on.
Here's the website (genevachat.com/) but it's a bit out of date / new one WIP
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Geneva has this - it's like Slack with a built in paid subscription management system. Only available to select groups right now, but if you or your colleague email me (sam@genevachat.com) I can show you more / get you on.
Here's the website (genevachat.com/) but it's a bit out of date / new one WIP