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:
- Revolut Business: https://business.revolut.com/
- Wise: https://wise.com/
- Stripe: https://stripe.com/
and they allow Alterneum to manage multiple currencies and operate with lower fees on an international scale.