<commit_before>What Is Sia?
============

Sia (/'saɪə/) is a compensation-based platform for distributed cloud storage. Anybody can join Sia as a storage host, and anybody can rent storage from the network. It's like Airbnb for your hard drive: through crowd-sourcing, we can eliminate a lot of overhead and improve quality of service.

Sia is a robust platform that stores files across hundreds of machines. If any of these machines fail, corrupt, or disconnect, the network will automatically repair the lost files with no break in service. Even with these protections against widespread failure or host withdrawal, the total redundancy is only around 25%—substantially less expensive than using RAID or a mirrored backup.

Sia is cheap. Very cheap. The amortized market cost of bulk storage is around $50 per TB, with the average disk lasting around 18 months. So on a monthly basis, the raw cost of hosting data is less than $3 per TB. After adding in Sia's redundancy and a profit margin, the cost should come to approximately $5 per TB-month, or $0.005 per GB-month. This is half of the price of Amazon Glacier, which charges 1 cent per GB-month.

Sia is fast. Every file is hosted across hundreds of machines, so downloads are highly parallel. In mosts cases, this should be enough to saturate your Internet connection. The power of distributed systems makes Sia both faster than Amazon S3 and cheaper than Amazon Glacier.

Sia is elastic. You can rent as much or as little storage as you want, and you pay for exactly what you are renting. You never need to guess whether you need the 100GB package or the 500GB package. Instead, you rent exactly as much as you use, expanding or contracting as you add and remove files. There is no fee for adjusting how much you are renting.

Sia secure. By default, all data is encrypted on the client machine before being uploaded to the network. The encrypted data is then divided into pieces and distributed across hundreds of hosts. Only you can view the contents of your files.

Economic Model<commit_msg>Missing "is" in sentence "Sia secure."<commit_after>What Is Sia?
============

Sia (/'saɪə/) is a compensation-based platform for distributed cloud storage. Anybody can join Sia as a storage host, and anybody can rent storage from the network. It's like Airbnb for your hard drive: through crowd-sourcing, we can eliminate a lot of overhead and improve quality of service.

Sia is a robust platform that stores files across hundreds of machines. If any of these machines fail, corrupt, or disconnect, the network will automatically repair the lost files with no break in service. Even with these protections against widespread failure or host withdrawal, the total redundancy is only around 25%—substantially less expensive than using RAID or a mirrored backup.

Sia is cheap. Very cheap. The amortized market cost of bulk storage is around $50 per TB, with the average disk lasting around 18 months. So on a monthly basis, the raw cost of hosting data is less than $3 per TB. After adding in Sia's redundancy and a profit margin, the cost should come to approximately $5 per TB-month, or $0.005 per GB-month. This is half of the price of Amazon Glacier, which charges 1 cent per GB-month.

Sia is fast. Every file is hosted across hundreds of machines, so downloads are highly parallel. In mosts cases, this should be enough to saturate your Internet connection. The power of distributed systems makes Sia both faster than Amazon S3 and cheaper than Amazon Glacier.

Sia is elastic. You can rent as much or as little storage as you want, and you pay for exactly what you are renting. You never need to guess whether you need the 100GB package or the 500GB package. Instead, you rent exactly as much as you use, expanding or contracting as you add and remove files. There is no fee for adjusting how much you are renting.

Sia is secure. By default, all data is encrypted on the client machine before being uploaded to the network. The encrypted data is then divided into pieces and distributed across hundreds of hosts. Only you can view the contents of your files.

Economic Model
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