There are a few, such as Pantheon[1], Acquia Cloud[2], Platform.sh[3]. All three of the above providers did add some level of protection immediately following the security announcement, and they (and some other providers) helped ensure sites were updated to 7.32 as soon as possible.
I have to link back to my earlier comment about the key takeaway here[4]—not just for Drupal sites, but for anyone who operates any site on any server. You can't afford to let your site sit unmaintained if you value the information within; and if you build sites for other people, you have to convey the importance of that to your customers... 'With great power comes great responsibility' and all that jazz.
Your site is either currently broken, or will be someday; it's not about making 100% secure code and servers (you strive for that, of course); it's about your response once something happens (e.g. a security patch is released).
I have to link back to my earlier comment about the key takeaway here[4]—not just for Drupal sites, but for anyone who operates any site on any server. You can't afford to let your site sit unmaintained if you value the information within; and if you build sites for other people, you have to convey the importance of that to your customers... 'With great power comes great responsibility' and all that jazz.
Your site is either currently broken, or will be someday; it's not about making 100% secure code and servers (you strive for that, of course); it's about your response once something happens (e.g. a security patch is released).
[1] https://www.getpantheon.com/
[2] https://www.acquia.com/products-services/acquia-cloud
[3] https://platform.sh/
[4] https://news.ycombinator.com/item?id=8529385