Well, I'm a mod, so you can assume some bias, but no. I don't find a need for other tools. I think the cost of all the competitive tools I would need to do what TubeBuddy does would exceed the cost of TubeBuddy.
In the interest of transparency, the correct comparison would be TubeBuddy to VidIQ and before I ever became a mod I tried both extensively and decided TubeBuddy was the best tool for me. That isn't saying VidIQ is bad, it is just saying TubeBuddy had the set of features that I found the most useful for me.