Discourse vs Invision Community

[merefield (Robert)]

There is already this:

Group Invitation Plugin

Summary: Allow users in a group to invite other users joining the group. GitHub: GitHub - hitorino/group-invitation: A Discourse plugin that allows you to invite another user into a g Install: Follow the plugin installation guide. Don’t forget to run rake db:migrate to create additional tables. Features Group members can invite users not in the group to join. Site admin can set minimum trust level for inviters and invitees. Automatic or manual approval. In automatic …

Which might help?

And this:

Discourse Category Home

Summary: Give users each a specific Homepage (“Home Category”) in your community. It allows you to have a single Discourse in which users have specific “home pages” (read: Category) as determined by their Primary Group. GitHub: Repository https://github.com/merefield/discourse-category-home Install: Follow the plugin installation guide. Features Using only the available interface elements of a normal Discourse, makes this a robust, easy-to-maintain solution. Config…

(Or @pfaffman TC which is linked in above)

Quite often if you have a clear and reasonable requirement for a plugin you can get it built.

If you are a business and have budget this should be even less of a barrier.