They provide multiple connections over different technologies and incorporate the SD-WAN service as a bundle. I suspect that this trend will become common place. It seems like a win-win to me. As with most technologies today, there are hosted and premise offerings and many include firewalls, etc.
Make sure if you opt for a hosted solution, that behind the scenes, they are not creating a single point of failure. As always: Caveat Emptor a.k.a. get references. Signing on the dotted line with an IT services and support provider can be a challenging proposition. With a lot of big market players making their presence felt and various critical factors to size up for making a well-thought-out decision, settling for a right provider may eat up more time and efforts than expected.