You need to look at a number of things when deciding where to raise those funds. Evauate fees first of all while bearing in mind that cheaper doesn’t always mean better.
In addition, have a quick crack at create a page and see how easy it is.
This will give you a good idea on whether all elements of the site are easy to use or if it’s a little too clunky.
Finally, check the style and make sure it matches with the style of your fundraiser.