Difference between Mega and Ubuntu One

1. Mega :
Mega is a file hosting service and cloud storage which is provided by Mega Limited. It is basically designed for web based applications but it also provides mobile applications for Android, Windows Phone and iPhone. It was launched by Kim Dotcom in 2013. It was developed using PHP, C++, JavaScript, Java and Objective-C. It offers 20 GB free storage space with an additional 5 GB for a free trial. 

2. Ubuntu One :
Ubuntu One was a file hosting service, file synchronization service and cloud service which was provided by Canonical Limited. It was an OpenID based single sign-on service. It provided services for storing files on cloud and also streaming of music from cloud. It was developed by Canonical Ltd. It was suitable for Windows, OS X, iOS, Ubuntu and Android. It offered 5 GB free storage space. It was launched in 2009. 

Difference between Mega and Ubuntu One :

MEGA	UBUNTU ONE
It is owned by Mega Limited.	It was owned by Canonical Limited.
It was launched in 2013.	It was launched in 2009.
It offers 20 GB free storage space with additional 5 GB per achievements.	It offered 5 GB free storage space.
It was developed by Kim Dotcom.	It was developed by Canonical Ltd.
It has the maximum storage size of 16 TB.	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 equal to available cloud drive space.	Maximum file size was 5 GB per file.
It is a file hosting, file synchronization cloud storage service.	It was a commercial file synchronization service.
It supports Windows, OS X, Linux, Android, iOS and Blackberry.	It supported Windows, OS X, Ubuntu, iOS and Android.
It has client-side encryption.	It did not have client-side encryption.
It has traffic or band-width limit of 10 GB per month for free and 16 TB per month for paid.	It has Amazon S3 limits as traffic or band-width limit.