How important is it to have a cofounder, in order to get funding from a VC or an angel investor?

co-founders is very important in any startup , being a solo player will make it very hard, the one man show doesn't work in such environment , and investors are aware of that, my advice is try to find a partner

having a cofounder in order to get funding from a VC or AI is a killer move. you have a cofounder to help you create your dream and make it true not just for having money!