1. SugarSync：
SugarSync是由J2 Global提供的云服务和文件同步服务。它可以主动同步计算机系统和其他设备中的文件，以进行备份，访问和共享。 Windows，macOS，iOS和Android操作系统均支持它。它由J2 Global在2009年推出。它不提供免费的存储空间。它提供付费的有限和无限存储空间。
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。
SugarSync和Zetta之间的区别：
| SUGARSYNC | ZETTA |
|---|---|
| It is owned by J2 Global. | It is owned by Zetta Incorporation. |
| It was launched in 2009. | It was launched in 2008. |
| It does not offer free storage space. | It does not offer freeware service. |
| It was developed by J2 Global. | It was developed by Jeff Whitehead, Lou Montulli and Jason Harrison. |
| It is a file hosting and file synchronization 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 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. |
| It does not have freeware version. | It also does not have freeware version. |
| It is supported by Windows, OS X, Android, BlackBerry, iOS and Windows Phone. | It is supported by Windows, OS X and Linux. |