Is THORChain built on Cosmos?

Could you clarify for me, is THORChain actually constructed upon the Cosmos ecosystem? I've heard rumors that it's based on a different infrastructure, but I'm not entirely sure. Could you elaborate on the technological foundation of THORChain and whether or not it's interconnected with Cosmos in any significant way? I'm interested in understanding the architecture and interoperability aspects of this blockchain project. Thank you for your insights.