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. Zetta：
Zetta是Zetta Incorporation提供的文件同步服务和基于云的备份存储服务。它是由Jeff Whitehead ， Lou Montulli和Jason Harrison开发的。它主要用于中小型企业和企业。它不提供免费版本。它主要用于存储专业数据而不是个人数据。它于2008年推出。
Mega和Zetta之间的区别：
| MEGA | ZETTA |
|---|---|
| It is owned by Mega Limited. | It is owned by Zetta Incorporation. |
| It was launched in 2013. | It was launched in 2008. |
| It offers 15 GB free storage space with additional 35 GB for free trial. | It does not offer freeware service. |
| It was developed by Kim Dotcom. | It was developed by Jeff Whitehead, Lou Montulli and Jason Harrison. |
| It is a file hosting and file synchronization service. | It is a file synchronization service. |
| It provides cloud storage service. | It provides cloud based backup service. |
| It is used by individuals, small and larger enterprises. | It is used by small and medium sized enterprises. |
| It provides storage service for personal data. | It does not provide service for personal data and is used for professional work only. |
| It supports file versioning. | It does not support file versioning. |
| It does not provide Delta copying i.e. block level transfer. | It provides Delta copying. |
| It is supported by Windows, OS X, Linux, Android, iOS and BlackBerry. | It is supported by Windows, OS X and Linux. |
| It has freeware version. | It does not have freeware version. |