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. 云：
pCloud 是 pCloud AG 提供的文件共享和云存储服务。它是一种安全的云存储服务。它还提供文件共享服务，有助于与其他用户共享文件。它没有文件大小的限制。它由 pCloud AG 开发。它提供 10 GB 的免费存储空间。它为付费提供了有限的最大存储空间。它于2013年推出。
Wuala 和 pCloud 的区别：
| WUALA | PCLOUD |
|---|---|
| Originally owned by Caleido Incorporation but was later owned by Seagate Technology. | It is owned by pCloud AG. |
| It was launched in 2008. | It was launched in 2013. |
| It was developed by Dominik Grolimund and Luzius Meisserin. | It was developed by pCloud AG. |
| It offered 5 GB free storage space but later on it was made only paid-service. | It offers 10 GB free storage space. |
| It offered 2 TB maximum storage size for paid. | Maximum storage size for paid is 2 TB here also. |
| It was a file hosting and commercial file synchronization service. | It is a file sharing service. |
| It did not support file versioning. | It supports file versioning. |
| It provided ability to trade local disk storage space against cloud storage. | It does not provide ability to trade local disk storage space. |
| Initially it had referral system but later on referral service was suspended. | It does not provide additional free storage space for referral. |
| It had traffic or band-width limit. | It does not have traffic or band-width limit. |
| This service was suspended in 2015. | It is still in use. |