Difference between Backblaze B2 and Wuala

1. Backblaze B2 :
Backblaze B2 is a cloud storage service which is provided by Backblaze Incorporation. It is quite similar to the Amazon S3 and other cloud storage services. It is an object storage service. It was launched by Backblaze Incorporation in 2015. It offers 10 GB free storage space. Maximum file size is 5GB. It also provides unlimited storage space for premium accounts. It is also known as B2 cloud storage. 

2. Wuala :
Wuala was a file synchronization service, file storage service, file versioning service and backup storage service which was originally provided by Caleido Incorporation but was later owned by Seagate Technology. It was developed by Dominik Grolimund and Luzius Meisserin. It was majorly developed using Java. It offered 5 GB free storage space. It was launched in 2008. 

Difference between Backblaze B2 and Wuala :

BACKBLAZE B2	WUALA
It is owned by Backblaze Incorporation.	Originally owned by Caleido Incorporation but was later owned by Seagate Technology.
It was launched in 2015.	It was launched in 2008.
It offers 10 GB free storage space, unlimited free uploads, and 1 GB of free downloads each day.	It offered 5 GB free storage space but later on it was made only paid-service.
It was developed by Backblaze 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 unlimited maximum storage size.	Maximum storage size offered was 2 TB here.
It supports file versioning.	It also 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 still in use.	This service was suspended in 2015.
It supports life cycle policy.	It does not support life cycle policy.