Is Hedera based on Ethereum?

I'm curious, is Hedera Hashgraph actually based on the Ethereum blockchain? I've been hearing a lot about Hedera recently and it seems to be making quite a buzz in the crypto world. But I'm a bit confused about its technological foundation. Is it leveraging the power of Ethereum's smart contracts or does it have its own unique architecture? Could you clarify this for me, please? I'm really eager to understand the intricacies of this emerging cryptocurrency and how it fits into the broader landscape of finance and technology.