Is an IUI painful like an HSG?

Thinking about going the <a href="https://glowing.com/glow-fertility-program">IUI</a> route for conception (meeting tomorrow with a fertility specialist). I was reading about how they do the procedure and I had flashbacks of my HSG test and how God awful painful it was when they inflated the balloon in my uterus.

Do they do the same in an <a href="https://glowing.com/glow-fertility-program">IUI</a>? Is it as painful as an HSG?