The world is a big place and real estate is very local. No real estate company is represented everywhere. Most of the large real estate companies have offices throughout the USA along with offices in some countries, mine included (EXIT Realty International). Some of us have further relationships with companies and agents in specific countries and cities within. The real issue is where you are interested in investing and what kind of investment? I may be able to help you if you could answer these two questions. Also, you should be dealing only with "agents" who specialize in investment properties and can better advise you in your search. It is not the company, but the agent that you deal with that is most important. Mistakes can be costly.