Can I create a professional website for my business?

I am mid-sized business person, and professionally known for serving small and big sized customers. I want to draw more customers from various regions, hence I want to build a professional, and mobile friendly website for my business. I want to create a professional business website as per my business needs. There are many companies in the market, but I look for a professional website development company. I don’t have full ideas about a reliable web development agency. Can anyone suggest the best ideas for a professional company?