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. Ubuntu One：
Ubuntu One是由Canonical Limited提供的文件托管服务，文件同步服务和云服务。这是一个基于OpenID的单点登录服务。它提供了用于在云上存储文件以及从云流式传输音乐的服务。它由Canonical Ltd.开发。适用于Windows，OS X，iOS，Ubuntu和Android。它提供了5 GB的可用存储空间。它于2009年推出。
Amazon Drive和Ubuntu One之间的区别：
| AMAZON DRIVE | UBUNTU ONE |
|---|---|
| It is owned by Amazon. | It was owned by Canonical Limited. |
| It was launched in 2011. | It was launched in 2009. |
| It offers 5 GB free storage space. | It also offered 5 GB free storage space. |
| It was developed by Amazon. | It was developed by Canonical Ltd. |
| It has the maximum storage size of 30 TB. | Maximum storage size was unlimited here. |
| It is used in all countries excluding Mexico and China. | While it was used world wide. |
| It is still in use. | This service was suspended in 2014. |
| It is used to store photos specifically. | It was used to store all types of files. |
| Files stored here are encrypted. | Files stored in Ubuntu One were not encrypted. |
| Maximum file size is 2 GB upload via web and 50 GB upload via drive application. | Maximum file size was 5 GB per file. |
| It is a file hosting and cloud storage service. | It was a commercial file synchronization service. |