This one's good, and most of the value lies in how visually customizable it is, in my opinion.

It seems you can make a custom theme, with a custom domain, and have considerable control over the colors and sizing of every element.

So if you want a really nicely custom branded form, you can do it well here, for pretty cheap.

The lowest paid tier is $5 a month, that's a nice price, if you have to pay something. I would give this tool a 5/5, but the lack of a free tier drops it a point.

That and the pretty small limit on the amount of form submissions per month.

They tried giving me with a 44-step tutorial on how to use the tool, and the interface kept bugging and disconnecting. Refreshing solved the issue, and the tool worked well from that point on though.

I'd recommend it if you need something fully custom to fit your brand's style, and you don't want to spend much!