The company launching Earthium.io is Alterneum LTD, a UK company based in London.

 

You can find and download all relevant information here:

https://www.companiesdatabase.uk/company/alterneum-ltd/13456718

 

The banks and payment gateways used by Alterneum are classical:

 

and they allow Alterneum to manage multiple currencies and operate with lower fees on an international scale.