In private clouds, a single firm uses the entire IT infrastructure, which is managed by an in-house technical team. However, in public clouds, multiple users rely on a common IT infrastructure, managed by the cloud service vendors.
Private clouds establish strong data security frameworks in comparison to public data clouds because there is no third-party involvement.
Since public clouds are managed by third-party vendors, companies do not have to spend time and money on maintenance. However, maintenance cost for private, hybrid, and multi-clouds is quite high.