Why hire a branding agency? Well, I'll be honest. You don't always have to hire a branding agency to get a good brand. DIY can be an option. 

Some companies might be able to squeak by without having to use one. This is particularly true if you have longtime experience with creating your own brand and know how to communicate a message well. It's a good way to save money as long as you are willing to invest in the elbow grease. 

However, most small businesses should hire a branding agency. There are several reasons why, too.

1) They offer up perspective on your brand that you might not have been able to see. Everyone has a blind spot when it comes to their own ideas. Being able to run ideas by another pro can help you see flaws you otherwise would be able to.

2) You might be overestimating what you can do. Building a brand is not as easy as it looks. This is doubly true when you are trying to make sure it resonates with a group of people you don't quite understand. 

3) Building a brand is also a lot of work. Like, we're talking about coming up with hours of concept art alone. Knowing this, you might want to rethink how much work you're willing to put in. After all, you have your business stuff to do, too. 

4) When you're working with professionals, you can expect good results time and time again. So, quality is also a thing to consider.