It's harder to garner investment funds, but there's nothing to stop you from building a business as a single founder. In my case, I've started a number of prod

It's harder to garner investment funds, but there's nothing to stop you from building a business as a single founder. In my case, I've started a number of products that have languished and died because I was lacking skillsets that weren't as easy for me to acquire as it was to find somebody who had them. Long and short of it, it is often easier to supplement what you don't know with somebody that does know those things than it is to find more time in the day to learn it all and do it all yourself. Even if you know everything yourself, finding the time to do marketing / promotion / split-testing the site copy / crafting emails / handling user support, etc., are time-intensive tasks, and if you are like me, you'd rather be building new features than doing those things. If you can find somebody passionate that can take approximately half of the workload, it's a life saver. It's also handy to have another smart* individual that can take that work off of you, then it's a lifesaver. If you've never launched a product, then it's really hard to know how much work is involved post-launch. Launch is really just the beginning, and as hard as it is to launch, getting your product to succeed at market is many times harder.