Firstly I'm British, so I'm not talking about having my jobs stolen. Secondly, Google for "B1 visa". Take the first result. Read down to "The following activit

Firstly I'm British, so I'm not talking about having my jobs stolen. Secondly, Google for "B1 visa". Take the first result. Read down to "The following activities require a working visa, and may not be carried out by business visitors". It clearly says that you may not run a business. If you founded a startup, that sounds like you ran a business.