I would give him an ultimatum, either quit you job right now (since you're not an employee you don't even have to give a two weeks notice) or get 2 times your salary.
After that, regardless of the outcome start looking for another job, because once you have forced his hand like this the founder is likely to find a way to not need you anymore and fire you sooner or later...
Because he needs you, he's likely to agree to your terms (as long as you don't repeat it to another), and you'll be in a better financial position while looking for a new job
After that, regardless of the outcome start looking for another job, because once you have forced his hand like this the founder is likely to find a way to not need you anymore and fire you sooner or later...
Because he needs you, he's likely to agree to your terms (as long as you don't repeat it to another), and you'll be in a better financial position while looking for a new job