1.糖同步：
SugarSync 是 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。它受 Windows、macOS、iOS 和 Android 操作系统支持。它由 J2 Global 于 2009 年推出。它不提供免费存储空间。它为付费用户提供有限和无限的存储空间。
2. ZumoDrive：
ZumoDrive 是一种文件托管服务、文件同步服务和基于云的文件存储服务，最初由 Zecter Incorporation 提供，但后来归摩托罗拉移动所有。它由 Zecter Inc. 开发，适用于 Windows、macOS、iOS、webOS、Linux 和 Android。它提供 2 GB 免费存储空间，付费可扩展至 500 GB。它于2009年推出。
SugarSync 和 ZumoDrive 的区别：
| SUGARSYNC | ZUMODRIVE |
|---|---|
| It is owned by J2 Global. | Originally owned by Zecter Incorporation but was later owned by Motorola Mobility. |
| It was launched in 2009. | It was also launched in 2009. |
| It does not offer free storage space. | It offered 2 GB free storage space. |
| It was developed by J2 Global. | It was developed by Zecter Inc. |
| Maximum storage size is 60 GB for personal paid and unlimited for professional paid. | Maximum storage size offered was 500 GB here. |
| It is a file hosting, file synchronization and cloud storage service. | It is a file hosting, file synchronization and cloud-based file storage service. |
| It is still in use. | This service was suspended in 2012. |
| It does not provide intelligent predictive caching. | It provided intelligent predictive caching. |
| It supports Windows, OS X, Android, BlackBerry, iOS and Windows Phone. | It supported Windows, OS X, Linux, Android, iOS and Palm webOS. |
| It does not have freeware version. | It had freeware version. |