online sms and contact backup

I want to build a site where users their android sms mms and contacts to be backed up. I can be quite the site yourself but am looking for apps that want to projecht. I want the site yourself in Dutch and English in the beginning. using the connect system that I've worked it would be possible that multiple apps with same site work.

Tanks,
Sorry for my bad english, if you contact my i will make it better.