Generally, an H-1B through the startup won't work so you have to look at other visa options and oftentimes, under current law, this is limited to an O-1 or E-2

Generally, an H-1B through the startup won't work so you have to look at other visa options and oftentimes, under current law, this is limited to an O-1 or E-2 if the founder is a citizen of a country that gives rise to an E-2.