How moralis store data

well I know under the hood data is save with IPFS, but still I am not clear where this data saved
is it using filecoin or what

It looks like the data that is saved on IPFS with Moralis is also accessible by other IPFS gateways like cloudflare.

ok but Question is, is it decentralized which filecoin is used for

what would be the difference for you?