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. pCloud：
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。它还提供了文件共享服务，该服务有助于与其他用户共享文件。它没有文件大小的限制。它是由pCloud AG开发的。它提供10 GB的可用存储空间。它提供了有限的最大付费存储空间。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. |