Is IMX an Ethereum?

I'm hearing a lot about IMX these days, and I'm wondering if it's an Ethereum? Could you clarify this for me? I've been following the crypto space for a while, but I'm still getting my head around some of the newer projects. I've seen IMX mentioned in a few articles and discussions, but I'm not sure if it's a token on the Ethereum blockchain or if it's a separate blockchain altogether. If it's an Ethereum-based project, I'd like to know more about its functionality and how it fits into the Ethereum ecosystem. Could you enlighten me on this, please?