| It is owned by Dropbox Incorporation. | It was owned by Canonical Limited. |
| It was launched in 2007. | It was launched in 2009. |
| It offers 2 GB free storage space. | It offered 5 GB free storage space. |
| It was developed by Drew Houston and Arash Ferdowsi. | It was developed by Canonical Ltd. |
| Maximum storage size is 5 TB here. | Maximum storage size was unlimited here. |
| It is still in use. | This service was suspended in 2014. |
| Files stored here are encrypted. | Files stored in Ubuntu One were not encrypted. |
| Maximum file size is 100 MB for free, 2 GB for paid Plus plan 100 GB for paid Professional plan. | Maximum file size was 5 GB per file. |
| It is a file hosting, file synchronization and cloud storage service. | It was a commercial file synchronization service. |
| It has traffic or band-width limit of 20 GB per day for free and 200 GB per day for paid. | It has Amazon S3 limits as traffic or band-width limit. |
| It supports Windows, OS X, Linux, iOS, Android and Blackberry. | It supported Windows, OS X, iOS, Ubuntu and Android. |
| It shares files through web applications. | While it shared files through links. |
| It uses block-syncing to update changes quickly. | It did not use block-syncing to update changes quickly. |
| It provides additional 500 MB free storage space for referral up to 16 GB. | It did not have referral system for gaining free additional storage space. |