Is Axelar on Ethereum?

As a cryptocurrency enthusiast and finance professional, I'm often curious about the intersection of various blockchain platforms. Recently, I've been hearing quite a bit about Axelar, a network that aims to provide cross-chain interoperability. However, I'm not entirely sure if Axelar is actually built on the Ethereum blockchain. Could you please clarify whether Axelar operates on Ethereum, or if it's a separate network that interacts with Ethereum and other blockchains? Understanding this distinction is crucial for me to assess the potential impact and opportunities Axelar may offer in the broader crypto ecosystem.