Can I obtain a Digital Nomad Visa (DTV) in Thailand if I start a new company while working online for my current employer?

Here is something to serious consider before you do anything. If you keep working for your current employer right now, before you start your own company, and he will write a simple letter allowing you to work remotely, then with the other documents to apply for the visa, you will get the visa very soon after you apply, as long as the equivalent of the bt500,000 has been in your personal bank account long enough (from 3-6 months at most locations now). After you get the DTV THEN quit, and set-up your own business to work contract work for your current employer. It doesn't change your five year visa. It won't affect it at all. Doing it this way makes it all much easier, as it sounds like your employer will work with you to make it happen. Just saying.