While there’s no silver bullet for building and growing a community online, there are a few key questions to consider that will help guide your tooling decisions and your community strategy.

You and your community members already use Slack for work.

Earlier this year I was looking for this and didn't find an adequate solution. I believe that the Reddit-/HN-way of leading a community is quite productive. As the connection between a chat and a forum, it provides the perfect mix between a casual exchange and productive discussions.