Is Hive based on Ethereum?

I'm curious to know if Hive is built on top of Ethereum's blockchain technology. Could you clarify if Hive is a fork of Ethereum, or if it utilizes any of Ethereum's features or protocols? Is there any direct relationship between the two platforms, or do they operate independently of each other? I'm trying to understand the technical foundation of Hive and how it differs from other blockchain projects, including Ethereum.