1.乌拉：
Wuala 是一种文件同步服务、文件存储服务、文件版本控制服务和备份存储服务，最初由 Caleido Incorporation 提供，但后来归希捷科技所有。它是由Dominik Grolimund和Luzius Meisserin 开发的。它主要是使用Java开发的。它提供了 5 GB 的免费存储空间。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。
Wuala 和 RapidShare 的区别：
| WUALA | RAPIDSHARE |
|---|---|
| Originally owned by Caleido Incorporation but was later owned by Seagate Technology. | It was owned by RapidShare AG. |
| It was launched in 2008. | It was launched in 2002. |
| It was developed by Dominik Grolimund and Luzius Meisserin. | It was developed by Christian Schmid. |
| It offered 5 GB free storage space but later on it was made only paid-service. | It offered free storage space always. |
| It offered 2 TB maximum storage space for paid. | It offered limited maximum storage space for paid. |
| It was a file hosting, commercial file synchronization and cloud storage service. | It was a file hosting and online backup service. |
| Files could be downloaded multiple times. | Files could be downloaded only 10 times in free account. |
| Links did not expire after inactivity of some days. | While here, links expired after inactivity of 60 days. |
| It was suspended in 2015. | This service was also suspended in 2015. |
| It provided ability to trade local disk storage space against cloud storage. | It did not provide ability to trade local disk storage space. |
| Initially it had referral system but later on referral service was suspended. | It did not provide additional free storage space for referral. |