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. Zetta：
Zetta是Zetta Incorporation提供的文件同步服务和基于云的备份存储服务。它是由Jeff Whitehead ， Lou Montulli和Jason Harrison开发的。它主要用于中小型企业和企业。它不提供免费版本。它主要用于存储专业数据而不是个人数据。它于2008年推出。
Amazon S3和Zetta之间的区别：
| AMAZON S3 | ZETTA |
|---|---|
| It is owned by Amazon. | It is owned by Zetta Incorporation. |
| It was launched in 2006. | It was launched in 2008. |
| It does not offer free storage space. | It does not offer freeware service. |
| It was developed by Amazon Web Services (AWS). | It was developed by Jeff Whitehead, Lou Montulli and Jason Harrison. |
| It is a file hosting service. | It is a file synchronization service. |
| It provides cloud storage service. | It provides cloud based backup service. |
| It is used by individuals, small and larger enterprises. | It is used by small and medium sized enterprises. |
| It does not provide LAN synchronization. | It provides LAN synchronization. |
| It provides storage service for personal data. | It does not provide service for personal data and is used for professional work only. |
| It supports file versioning. | It does not support file versioning. |