Crashplan doesn't require that your backup leave the house. You can backup to a local drive, or have 2 computers in the same house backing up to each other. Crashplan also uses deduplication to reduce the required bandwidth and storage. If you do choose to backup outside of your house, your backups are also encrypted so that whoever you are sending your backup to, can't look at your data. You can also use an Android or Apple app to access your files when you are not at home.