Awesome product, great for PMs. Integration with Jira gives the overview Atlassian cannot provide. It combines elements I would otherwise save and sync in Omnifocus/Evernote. Is it the Invision equivalent for PMs? ;)

Great tool for product managers. Amazing design, intuitive interface

Beautiful homepage. Due to similarity of logos (and somewhat of product general motifs), is this by chance a derivative product by Contentful?