[ujjwalg]

You do realize that if you are out of status at any time, which you will be if you are working part time on H1B (you obtained for a different company) for your startup, you are illegally living in US. Moreover, if you apply for an extension or move the H1B to your own startup, you will have to mention that you were out of status because you were working for your own company, which will make you ineligible for H1B. If you dont, and you get caught you will be barred to enter US FOREVER, because you lied on an immigration document. Do you also know that you cannot get an H1B visa for your own startup no matter what, unless you can show somehow that you can be fired (which only can happen if you give away most of your equity to someone else). Even if you are not making money when you are on H1B for a different company, but if you signed a contract, signed a cheque, or were responding to customers, you are out of status. You can think that how can anyone would come to know that you were working at the backend, but are you willing to take the risk of getting barred to enter US forever?