1. 云：
iCloud 是苹果公司提供的云存储和云计算服务。它允许用户将文档、照片和音乐等数据存储在远程服务器上，以便下载到 iOS、macOS 或 Windows 设备。它还能够与其他用户共享和发送数据。如果 Apple 设备丢失或被盗，管理它也很有帮助。它于2011年推出。
2.泽塔：
Zetta 是由 Zetta Incorporation 提供的文件同步服务和基于云的备份存储服务。它由Jeff Whitehead 、 Lou Montulli和Jason Harrison 开发。它主要用于中小型企业和企业。它不提供免费软件版本。它主要用于存储专业数据而不是个人数据。它于2008年推出。
iCloud 和 Zetta 的区别：
| ICLOUD | ZETTA |
|---|---|
| It is owned by Apple Incorporation. | It is owned by Zetta Incorporation. |
| It was launched in 2011. | It was launched in 2008. |
| It offers 5 GB free storage space. | It does not offer freeware service. |
| It was developed by Apple. | It was developed by Jeff Whitehead, Lou Montulli and Jason Harrison. |
| It is a file hosting service. | It is a file synchronization service. |
| It provides cloud storage service. | It provides cloud based backup service. |
| It is used by individuals, small and larger enterprises. | It is used by small and medium sized enterprises. |
| It provides storage service for personal data. | It does not provide service for personal data and is used for professional work only. |
| It partly supports file versioning. | It does not support file versioning. |
| It does not provide LAN synchronization. | It provides LAN synchronization. |
| It is mainly designed for macOS and iOS. | It is supported by Windows, OS X and Linux. |