1.乌拉：
Wuala 是一种文件同步服务、文件存储服务、文件版本控制服务和备份存储服务，最初由 Caleido Incorporation 提供，但后来归希捷科技所有。它是由Dominik Grolimund和Luzius Meisserin 开发的。它主要是使用Java开发的。它提供了 5 GB 的免费存储空间。它于2008年推出。
2. Ubuntu 一：
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。它提供了在云上存储文件以及从云中传输音乐的服务。它由 Canonical Ltd 开发，适用于 Windows、OS X、iOS、Ubuntu 和 Android。它提供了 5 GB 的免费存储空间。它于2009年推出。
Wuala 和 Ubuntu One 的区别：
| WUALA | UBUNTU ONE |
|---|---|
| Originally owned by Caleido Incorporation but was later owned by Seagate Technology. | It was owned by Canonical Limited. |
| It was launched in 2008. | It was launched in 2009. |
| It offered 5 GB free storage space but later on it was made only paid-service. | It offered 5 GB free storage space. |
| It was developed by Dominik Grolimund and Luzius Meisserin. | It was developed by Canonical Ltd. |
| It was suspended in 2015. | This service was suspended in 2014. |
| It had freeware version. | It also had freeware version. |
| Files stored here were encrypted. | Files stored in Ubuntu One were not encrypted. |
| It was a file hosting and commercial file synchronization service. | It was a commercial file synchronization service. |
| It was supported by Windows, OS X, Debian, Ubuntu, Android and iOS. | It was supported by Windows, OS X, Android, Ubuntu and iOS. |