1.亚马逊云端硬盘：
Amazon Drive是Amazon提供的文件托管服务和云存储。它允许云存储，文件托管，文件共享和文件备份。可以从台式机，移动设备和平板电脑等多种设备上传输此驱动器上的文件和文件夹。 Amazon Drive最初被称为Amazon Cloud Drive。它在世界范围内不可用。它在某些选定的国家/地区可用。它于2011年推出。
2. SugarSync：
SugarSync是由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。 Windows，macOS，iOS和Android操作系统均支持它。它由J2 Global在2009年推出。它不提供免费的存储空间。它提供付费的有限和无限存储空间。
Amazon Drive和SugarSync之间的区别：
| AMAZON DRIVE | SUGARSYNC |
|---|---|
| It is owned by Amazon. | It is owned by J2 Global. |
| It was launched in 2011. | It was launched in 2009. |
| It was developed by Amazon. | 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 used in all countries excluding Mexico and China. | While it is used world wide. |
| It has the maximum storage size of 30 TB. | Maximum storage size is 60 GB for personal paid and unlimited for professional paid. |
| It does not support file versioning. | It supports file versioning. |
| There is no way to control permission to the invite link of file or folder. | It gives access to control the permission to the invite link of file or folder. |
| It has Amazon S3 limit as traffic or band-width limit. | It has traffic or band-width limit of 10 GB per day for free and 250 GB per day for paid. |
| Maximum file size in Amazon Drive is 2 GB via Web and 50 GB via Drive application. | Here maximum file size has no restriction. |