I see how you could come to that conclusion. At first glance, yes similar. However, Confluence really is a Wiki on steroids. Great to link with Jira, collaborate on Specs or the like. You can use it for document storage but not what it's built for. We use Confluence internally in the Dev Team ourselves and for that it's great.
Shelf is for curated content, not direct collaboration or Wiki. For that, we integrate with what was built for it, such as Google Docs.
Shelf is for curated content, not direct collaboration or Wiki. For that, we integrate with what was built for it, such as Google Docs.
Here is a comparison with Confluence, hope that helps: https://shelf.io/shelf-vs-confluence-comparison