Sia is a cloud storage platform that enables anyone to rent out their unused hard drive space in return for cryptocurrency. It uses blockchain technology to provide a secure, distributed storage system. Sia provides an open-source platform for users to store data securely and privately, without relying on a central server. It also allows for users to manage their own data, as well as share with other users, and pay for it with cryptocurrency. Sia’s distributed network makes it more secure than centralized cloud storage solutions and is more cost effective than traditional cloud storage solutions. With Sia, users can store files and documents in a secure, private, and distributed manner that is immune to data loss, hacks, and other security risks. Furthermore, users can access their data from anywhere and are able to control their data and its associated costs.
Same objective, same feature.
FlowCloud was discontinued due to storage and maintenance issues. Read more here: https://flowcloud.xyz/why.html
Discontinued site no longer available
Storj follows the same data storage philosophy: your data is encrypted and backed up in multiple locations. You rent that space to others or you can rent your own hard drive for others to use. This is the future of secure, private and reliable data backup and synchronization.