You need to get in touch with your lawyer. Not the company's lawyer (who signs their checks?). Don't have one? Now's a great time- head downtown and pick whi

You need to get in touch with your lawyer. Not the company's lawyer (who signs their checks?). Don't have one? Now's a great time- head downtown and pick whichever one doesn't already represent your company or your partner. What your lawyer would probably advise (and definitely don't do this just because I suggested it) is if you have an invention assignment, which says your work product is the company's because the company pays you, issue a notice that your agreement(s) have been breached. Hopefully you're not in a situation where you've relinquished all password control. If you have shared passwords with the CEO, change them to where they're no longer shared. Next, you may want to arrange for an indefinite maintenance update on your servers while you get this taken care of. Refer any and all complaints to the CEO and tell your customers that he has the ability to fix it. You're not going to get your cofounder to see your side by being the sane one in the relationship. One of you has declared war, while the other is trying to decide whether a state of war exists. Trust me, it does, and you lose ground every second you don't marshal your resources to win decisively.