1.百度云：
百度云是百度公司提供的云服务。它提供云存储服务、客户端软件、文件管理、资源共享和第三方集成。一旦在客户端上创建文件，它就可以在基于 Internet 的客户端上自动同步文件。它由百度公司于2012年推出。它的实际名称是百度网盘，但俗称百度云。
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。
百度云与Ubuntu One的区别：
| BAIDU CLOUD | UBUNTU ONE |
|---|---|
| It is owned by Baidu Incorporation. | It was owned by Canonical Limited. |
| It was launched in 2012. | It was launched in 2009. |
| It offers 6 GB free storage space. | It offered 5 GB free storage space. |
| It was developed by Baidu Inc. | It was developed by Canonical Ltd. |
| It has the maximum storage size of 2 TB. | Maximum storage size was unlimited here. |
| It is used China only. | While it was used world wide. |
| It is still in use. | This service was suspended in 2014. |
| Files stored here are encrypted. | Files stored in Ubuntu One were not encrypted. |
| Maximum file size is 4 GB for free and 20 GB for paid here. | Maximum file size was 5 GB per file. |
| It is a file hosting and cloud storage service. | It was a commercial file synchronization service. |
| It has unstable traffic or band-width limit. | It has Amazon S3 limits as traffic or band-width limit. |