[Osiris]

From the website it looks like Portabella is a more focused application, while notion is anything from a wiki to a Kanban board.

My company is evaluating Notion as a replacement for Confluence mostly, though we are looking at it's Kanban features also.

[alex_portabella]

Makes sense!

We've just launched our Documents feature, aiming to be a G Docs/Confluence alternative. Still early days though!

[Osiris]

G Docs and Confluence are VERY different products, in my view. One is about documents and one is about information sharing. You better pick early which one you're trying to be.