1. 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。
2. 云：
pCloud 是 pCloud AG 提供的文件共享和云存储服务。它是一种安全的云存储服务。它还提供文件共享服务，有助于与其他用户共享文件。它没有文件大小的限制。它由 pCloud AG 开发。它提供 10 GB 的免费存储空间。它为付费用户提供有限的最大存储空间。它于2013年推出。
Ubuntu One 和 pCloud 的区别：
| UBUNTU ONE | PCLOUD |
|---|---|
| It was owned by Canonical Limited. | It is owned by pCloud AG. |
| It was launched in 2009. | It was launched in 2013. |
| It was developed by Canonical Ltd. | It was developed by pCloud AG. |
| It offered 5 GB storage space for free. | It offers 10 GB free storage space. |
| It offered unlimited maximum storage space for paid. | It offers limited maximum storage space for paid. |
| It was a file hosting and commercial file synchronization service. | It is a file sharing service. |
| It did not support file versioning. | It supports file versioning. |
| Maximum file size was 5 GB per file. | Maximum file size is unlimited here. |
| It had traffic or band-width limit. | It does not have traffic or band-width limit. |
| This service was suspended in 2014. | It is still in use. |