1.泽塔：
Zetta 是由 Zetta Incorporation 提供的文件同步服务和基于云的备份存储服务。它由Jeff Whitehead 、 Lou Montulli和Jason Harrison 开发。它主要用于中小型企业和企业。它不提供免费软件版本。它主要用于存储专业数据而不是个人数据。它于2008年推出。
2.快速分享：
RapidShare 是由 RapidShare AG 提供的文件托管服务、云存储服务和在线备份服务。它有能力同时处理大量用户。它有多种语言版本，如英语、法语、德语和西班牙语。它是由Christian Schmid开发的。它最初被命名为ezShare。它是最早的云存储服务之一。它于2002年推出。
Zetta 和 RapidShare 的区别：
| ZETTA | RAPIDSHARE |
|---|---|
| It is owned by Zetta Incorporation. | It was owned by RapidShare AG. |
| It was launched in 2008. | It was launched in 2002. |
| It was developed by Jeff Whitehead, Lou Montulli and Jason Harrison. | It was developed by Christian Schmid. |
| It is a commercial file synchronization service. | It was a file hosting service. |
| It does not offer free storage space. | It offered free storage space. |
| It is still in use. | This service was suspended in 2015. |
| Files can be downloaded multiple times. | Files could be downloaded only 10 times in free account. |
| Links do not expire after inactivity of some days. | While here, links expired after inactivity of 60 days. |
| It is used by small and medium sized enterprises. | It was used by all sized enterprises. |
| It does not provide service for personal data and is used for professional work only. | It provided storage service for personal data too. |