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. 糖同步：
SugarSync 是 J2 Global 提供的云服务和文件同步服务。它可以主动同步计算机系统和其他设备中的文件，以进行备份、访问和共享。它受 Windows、macOS、iOS 和 Android 操作系统支持。它由 J2 Global 于 2009 年推出。它不提供免费存储空间。它为付费用户提供有限和无限的存储空间。
iCloud 和 SugarSync 的区别：
| ICLOUD | SUGARSYNC |
|---|---|
| It is owned by Apple Incorporation. | It is owned by J2 Global. |
| It was launched in 2011. | It was launched in 2009. |
| It was developed by Apple. | It was developed by J2 Global. |
| It offers 5 GB free storage space. | It does not offer free storage space. |
| It provides limited maximum storage space for paid. | It provides limited as well as unlimited maximum storage space for paid. |
| It is mostly used by Apple product users. | While it is used by all kinds of users. |
| Maximum storage size is 2 TB here. | Maximum storage size is 60 GB for personal paid and unlimited for professional paid. |
| It has traffic or band-width limit of 200 GB or 400 GB or 600 GB per month. | It has traffic or band-width limit of 10 GB per day for free and 250 GB per day for paid. |
| Maximum file size is 50 GB here. | Here maximum file size is not restricted. |
| It partly supports file versioning. | It fully supports file versioning. |