Is Beam ETH or BNB?

Could you kindly clarify something for me? I've been hearing a lot about Beam recently, but I'm a bit confused about its classification. Is Beam associated with Ethereum, making it an ETH-based token? Or, does it have ties to Binance, thus belonging to the BNB ecosystem? I'm trying to understand its position in the cryptocurrency landscape and how it fits into the broader finance world. Your insights would be greatly appreciated. Thank you in advance for clearing up this matter for me.