1.亚马逊S3：
Amazon S3代表Amazon Simple Storage Service。它是Amazon Web Services提供的一种云存储服务。它通过Web服务界面提供对象存储。它允许存储任何类型的对象，例如用于分析，数据存档，备份和恢复，灾难恢复，混合云存储和Internet应用程序的数据湖。它由AWS在2006年推出。
2.兆丰：
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。
Amazon S3和Mega之间的区别：
| AMAZON S3 | MEGA |
|---|---|
| It is owned by Amazon. | It is owned by Mega Limited. |
| It was launched in 2006. | It was launched in 2013. |
| It was developed by Amazon Web Services (AWS). | It was developed by Kim Dotcom. |
| It does not offer free storage space. | It offers 15 GB free storage space with additional 35 GB for free trial. |
| It provides unlimited storage space for paid. | It provides limited storage space for paid. |
| It requires credit-card details for free trial. | It does not require credit-card details for free trial. |
| It has the unlimited maximum storage size. | Maximum storage size is 16 TB here. |
| It does not provide applications for all operating systems and web based systems. | It provides applications for all operating systems and web based systems. |
| It supports file versioning. | It also supports file versioning. |
| It does not support remote uploading. | It also does not support remote uploading. |
| It has Amazon S3 limit as traffic or band-width limit. | It has traffic or band-width limit of 10 GB free and up to 96 TB per month for paid. |
| Maximum file size is 5 GB here. | Here maximum file size is equal to available cloud drive space. |