If a nonresident, you will need a visa. However, there is no need to stress as there are a variety of visas to suit your business and you can choose depending on what is most convenient for yourself and your company.
Some visas include the E-2, the F-1 OPT, H-1B Specialty Occupation, O-1A Extraordinary Ability and Achievement, among many others.
As previously stated, it all depends on your status, the time you are thinking of going/living in the US, and the future of your business, among numerous other factors that should be carefully considered beforehand.