I use Netlify and can vouch for its simplicity. I have a few sites on it, some are deployed via bitbucket and some are simply drag-and-drop.

I never used Forestry but by the looks of it, it looks more of an actual CMS and far too sophisticated than Netlify. Being said that it looks over engineered to me for hosting static websites. But if I wanted a CMS to host my client websites whom I have to hand over control, I would definitely give Forestry a try.