1.百度云：
百度云是百度公司提供的云服务。它提供云存储服务、客户端软件、文件管理、资源共享和第三方集成。一旦在客户端上创建文件，它就可以在基于 Internet 的客户端上自动同步文件。它由百度公司于2012年推出。它的实际名称是百度网盘，但俗称百度云。
2.亚马逊S3：
Amazon S3 代表 Amazon Simple Storage Service。它是由 Amazon Web Services 提供的云存储服务。它通过 Web 服务接口提供对象存储。它允许存储任何类型的对象，例如用于分析、数据归档、备份和恢复、灾难恢复、混合云存储和互联网应用程序的数据湖。它由 AWS 于 2006 年推出。
百度云和亚马逊S3的区别：
| BAIDU CLOUD | AMAZON S3 |
|---|---|
| It is owned by Baidu Incorporation. | It is owned by Amazon. |
| It was launched in 2012. | It was launched in 2006. |
| It offers 6 GB free storage space. | It does not offer free storage space. |
| It was developed by Baidu. | It was developed by Amazon Web Services (AWS). |
| It is used in come specific regions like China. | It is used world wide. |
| It has the maximum storage size of 2 TB. | It has the unlimited maximum storage size for paid users. |
| It supports remote uploading. | It also does not support remote uploading. |
| Maximum file size in Baidu Cloud is 4 GB for free and 20 GB for paid. | Here maximum file size is 5 GB. |
| It does not support file versioning. | It supports file versioning. |
| It does not require credit-card for free services. | It requires credit-card details for free trial. |