1.百度云：
百度云是百度公司提供的云服务。它提供云存储服务、客户端软件、文件管理、资源共享和第三方集成。一旦在客户端上创建文件，它就可以在基于 Internet 的客户端上自动同步文件。它由百度公司于2012年推出。它的实际名称是百度网盘，但俗称百度云。
2.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。
百度云和Wuala的区别：
| BAIDU CLOUD | WUALA |
|---|---|
| It is owned by Baidu Incorporation. | Originally owned by Caleido Incorporation but was later owned by Seagate Technology. |
| It was launched in 2012. | It was launched in 2008. |
| It offers 6 GB free storage space. | It offered 5 GB free storage space but later on it was made only paid-service. |
| It was developed by Baidu Inc. | It was developed by Dominik Grolimund and Luzius Meisserin. |
| It does not have referral system for gaining additional free storage space. | Initially it had referral system but later on referral service was suspended. |
| It has the 2 TB maximum storage size. | Maximum storage size offered was 2 TB here also. |
| It does not support file versioning. | It supported file versioning. |
| It does not provide ability to trade local disk storage space. | It provided ability to trade local disk storage space against cloud storage. |
| It is used in China only. | While it was used world wide. |
| It is still in use. | This service was suspended in 2015. |