Companies are using different Pos/PoW consensus mechanisms.
Consensus on a blockchain: in order for data to be confirmed, more than one node, one miner, one stakeholder, is saying that the data is accurate.
PoW is what Bitcoin uses, which is miners, doing mathematical equations to solve the block.
PoS is based on how much of a certain asset you’re holding, how much your stake is, and the more you stake gives you more access rights and you might be next to confirm a block.
A combination of these two: some believe it adds to the decentralization model.
Takes the consensus mechanism of PoS, to PoW, combining them two to lessen the amount of required energy, and increases the amount of voting power one has based on assets.