Oh dear god.
As an employee at a medium sized company that uses Jira and Confluence, I have to disagree.
I'm sure people out there have managed to wrangle and configure Jira into something usable, but it's implementation where I work has been just horrible.
And confluence... Apart from being just slow and unreliable, it's text editor gives me nightmares. I mean, all due respect for building that (it does some pretty powerful and complicated things), but 95% of the time I just want to write an article in Markdown and post it.