1.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。
2. 云：
pCloud 是 pCloud AG 提供的文件共享和云存储服务。它是一种安全的云存储服务。它还提供文件共享服务，有助于与其他用户共享文件。它没有文件大小的限制。它由 pCloud AG 开发。它提供 10 GB 的免费存储空间。它为付费用户提供有限的最大存储空间。它于2013年推出。
Amazon S3 和 pCloud 之间的区别：
| AMAZON S3 | PCLOUD |
|---|---|
| It is owned by Amazon. | It is owned by pCloud AG. |
| It was launched in 2006. | It was launched in 2013. |
| It was developed by Amazon Web Services (AWS). | It was developed by pCloud AG. |
| It does not offer free storage space. | It offers 10 GB free storage space. |
| It is a file hosting and cloud storage service. | It is a file sharing, cloud storage and backup service. |
| It provides unlimited maximum storage space. | It provides limited maximum storage space. |
| It supports file versioning. | It also supports file versioning. |
| Maximum storage size is unlimited here. | Here maximum storage size is 2 TB. |
| Maximum file size is 5 GB here. | Maximum file size is unlimited here. |
| It has Amazon S3 limit as traffic or band-width limit. | It does not have traffic or band-width limit. |
| It does not provide client-side encryption. | It provides client-side encryption. |
| It requires credit-card details for free trial. | It does not require credit-card details for free services. |