Another fantastic concept is from the Ceramic. I didn't think such decentralized data management is possible until I saw this market coming up. It is amazing that already this solution is probably supporting more than half of any web3 apps with strong data needs. I also love their focus on Decentralized ID support, which is really the key differentiator of Web3 data services vs Web2, where privacy is too big of a concern to do anything meaningful with well-being data of customers. 

https://ceramic.network/