All WordPress themes need some level of customization to look professional. Generally, this means they will need to modify the design, develop new templates and basically re-code the theme so that it fits your website. At the end of the day, you can almost never have a professional looking website with a free theme.

Can I use free WordPress themes for my business?

The WordPress repository has thousands of free themes for all kinds of businesses. However, with so many choices it can become quite overwhelming to find the perfect theme. For most business websites, you want a theme that looks good, is easy to customize, and helps you grow your business.