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. SugarSync：
SugarSync是由J2 Global提供的云服务和文件同步服务。它可以主动同步计算机系统和其他设备中的文件，以进行备份，访问和共享。 Windows，macOS，iOS和Android操作系统均支持它。它由J2 Global在2009年推出。它不提供免费的存储空间。它提供付费的有限和无限存储空间。 Mega和SugarSync之间的区别：
| MEGA | SUGARSYNC |
|---|---|
| It is owned by Mega Limited. | It is owned by J2 Global. |
| It was launched in 2013. | It was launched in 2009. |
| It was developed by Kim Dotcom. | It was developed by J2 Global. |
| It offers 15 GB free storage space with additional 35 GB for free trial. | It does not offer free storage space. |
| It provides limited maximum storage space for paid. | It provides limited as well as unlimited maximum storage space for paid. |
| It does not support remote uploading. | It also does not support remote uploading. |
| Maximum storage size is 16 TB here. | Maximum storage size is 60 GB for personal paid and unlimited for professional paid. |
| Maximum file size is equal to available cloud drive space. | Here maximum file size is not restricted. |
| It supports file versioning. | It also supports file versioning. |
| It has traffic or band-width limit of 10 GB free and up to 96 TB per month for paid. | It has traffic or band-width limit of 10 GB per day for free and 250 GB per day for paid. |
| It provides application for Windows, macOS, Linus, iOS, Android, Windows Phone, Blackberry and all web systems. | It provides application for Windows, macOS, iOS and Android only. |