My team and I have been using Capsule to share code snippets. Currently, we are leaving comments by editing entries and signing a blockquote, but would love to be able to add comments in a thread form and get email alerts when comments are made per the default WP functionality.
Capsule is designed as a single user app; are you using Capsule server?
I'm not, definitely might be what I should be using instead.
I'd recommend your team each be using their own Capsule install, then using Capsule server to aggregate content.
I'll close this in favor of: crowdfavorite/wp-capsule-server#5