Launching a retail brokerage from scratch is expensive, so many brands are white labels sitting on a larger provider's infrastructure. The client-facing name, website and support are local; the pricing, execution and risk management belong to the parent.
The arrangement is legitimate but affects who actually holds your money and who answers a complaint. The regulator's register will show whether the entity is authorised in its own right or acting as an appointed representative of someone else.
Example: a trader signs with a brand registered in one country but finds the terms name a different entity as the executing party and a third as the custodian of funds. Three balance sheets sit between the trader and the market.
Related: introducing-broker, counterparty-risk, offshore-broker, prime-of-prime