Full disclosure, I am the founder of Sia, which of course is my favorite and I do believe is far ahead of all the other platforms at this time. https://sia.tech
There is also Storj, MaidSafe, Filecoin, Swarm, and sort-of-but-not-quite IPFS.
Storj and Sia are the front runners for private data like family photos, computer backups, etc. I don't really consider Storj to be decentralized here though.
Swarm I know less about, but I believe their focus is more on file sharing. IPFS is closer to a replacement for http and BitTorrent (both), great for high-demand files or files that are being explicitly hosted on a web server but not so much private data. I think they plan to upgrade this with Filecoin.
MaidSafe is 10 years old and still in alpha. They have huge ambitions but I think too huge, they don't seem capable of publishing things.
There is also Storj, MaidSafe, Filecoin, Swarm, and sort-of-but-not-quite IPFS.
Storj and Sia are the front runners for private data like family photos, computer backups, etc. I don't really consider Storj to be decentralized here though.
Swarm I know less about, but I believe their focus is more on file sharing. IPFS is closer to a replacement for http and BitTorrent (both), great for high-demand files or files that are being explicitly hosted on a web server but not so much private data. I think they plan to upgrade this with Filecoin.
MaidSafe is 10 years old and still in alpha. They have huge ambitions but I think too huge, they don't seem capable of publishing things.