Indiegogo an option?
I’ve heard of continuetogive.com
Possibly
And possibly GoGetFunding, who told The Christian Post that they would not have denied service to the Kleins.
http://www.christianpost.com/news/gofundmes-competitor-we-would-not-shut-down-campaign-for-christian-bakers-fined-for-refusing-gay-wedding-cake-138330/