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Sia is a decentralized storage platform secured by blockchain technology. The Sia Storage Platform leverages underutilized hard drive capacity around the world to create a decentralized data storage marketplace that is more reliable and lower cost than traditional cloud storage providers. With Sia you can store files in the decentralized cloud without signup requirements, servers and trusted third-party providers. On average, Sia's decentralized cloud storage costs 90% less than incumbent cloud storage providers. Storing 1TB of files on Sia costs about $1-2 per month, compared with $23 on Amazon S3.

Tresorit provides end-to-end encrypted cloud storage for businesses. With Tresorit your company can easily create secure workspaces that allow your teams to work together in a secure environment. The service include features for secure file sharing, permission controls, access controls, email encryption and enrypted worksapces. Tresorit is used by organizations across the globe to protect vital information and bringing teams closer together within an encrypted environment.

Librevault allows you to transfer data directly from one device to another, securely. Librevault is a free and open-source peer-to-peer file synchronization software, designed with convenience. privacy and security in mind. The software encrypts all data with AES-256 and uses TLS for all transmissions. Their goal is to make a better alternative to BitTorrent Sync and Syncthing.

Amazon S3 or Amazon Simple Storage Service is object storage services provided by Amazon. It provides easy-to-use management features so you can organize your data and configure access controls to meet your specific business, organizational, and compliance requirements. Amazon S3 is used by millions of applications world-wide and is designed for 99.999999999% of durability.

Azure Blob Storage is a storage solution provided by Microsoft Azure as a part of its cloud services. Azure Blob Storage share many similarities with Amazon S3's object storage while providing it's own proprietary protocol. With Azure Blob Storage you can create data lakes for your analytics needs, and provides storage to build powerful cloud-native and mobile apps. Optimize costs with tiered storage for your long-term data, and flexibly scale up for high-performance computing and machine learning workloads.