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.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。
SugarSync 和 RapidShare 的区别：
| SUGARSYNC | RAPIDSHARE |
|---|---|
| It is owned by J2 Global. | It was owned by RapidShare AG. |
| It was launched in 2009. | It was launched in 2002. |
| It was developed by J2 Global. | It was developed by Christian Schmid. |
| It does not offer free storage space. | It offered limited free storage space. |
| Maximum storage size is unlimited for professional accounts. | Maximum storage size was limited here. |
| It is a file hosting, file synchronization and cloud storage service. | It was a file hosting and online backup service. |
| Maximum file size has no limit here. | Maximum file size was 500 MB per file. |
| 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 are not expired after inactivity of some days. | While here, links expired after inactivity of 60 days. |
| It has traffic or band-width limit of 10 GB per day for free and 250 GB per day for paid. | It had variable traffic or band-width limit according to paid plans. |