1.兆丰：
Mega是Mega Limited提供的文件托管服务和云存储。它基本上是为基于Web的应用程序而设计的，但它也为Android，Windows Phone和iPhone提供了移动应用程序。它由Kim Dotcom于2013年推出。它是使用C++，JavaScript， Java和Objective-C开发的。它提供15 GB的免费存储空间，另外还有35 GB的免费试用版。
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的免费存储空间。它于2009年推出。
Mega和Ubuntu One之间的区别：
| MEGA | UBUNTU ONE |
|---|---|
| It is owned by Mega Limited. | It was owned by Canonical Limited. |
| It was launched in 2013. | It was launched in 2009. |
| It offers 15 GB free storage space with additional 35 GB for free trial. | It offered 5 GB free storage space. |
| It was developed by Kim Dotcom. | It was developed by Canonical Ltd. |
| It has the maximum storage size of 16 TB. | Maximum storage size was unlimited here. |
| 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 equal to available cloud drive space. | Maximum file size was 5 GB per file. |
| It is a file hosting, file synchronization cloud storage service. | It was a commercial file synchronization service. |
| It supports Windows, OS X, Linux, Android, iOS and Blackberry. | It supported Windows, OS X, Ubuntu, iOS and Android. |
| It has client-side encryption. | It did not have client-side encryption. |
| It has traffic or band-width limit of 10 GB per month for free and 96 TB per month for paid. | It has Amazon S3 limits as traffic or band-width limit. |