LLC. The reason is, an LLC or "limited liability company," will protect you personally (e.g. your personal savings in the bank, your house, your car, and any income you have from other sources) from most business related debts or liabilities--that is, it (as the name implies) limits your liability. For example, is someone claims they were injured by your product, they could only sue the business, not you; and if you fail to pay a supplier or vendor for materials or supplies, they, too, could only sue the business, not you personally. But being a DBA does not give you that protection.