In the beginning of a company, there is no management and this actually works really well.
A single mediocre hire in the first five will often in fact kill a startup.
You have to be intense. This only comes from the CEO, this only comes from the founders.
Here's a good rule of thumb: don't worry about a competitor at all, until they're actually beating you with a real shipped product.
No matter what you choose, build stuff and be around smart people.
So always keep momentum, it's this prime directive for managing a startup.