As already mentioned, a knowledge base is usually a part of a company’s help desk platform that contains lots of information about different topics and can be regularly modified by your staff. On the other hand, FAQs have a static form and, as the name suggests, they contain frequently asked questions about a specific topic. The main differences between knowledge bases and FAQs include information architecture, searchability, user experience, and analytics possibilities.
Based on your company’s needs, you need to assess which of these solutions is a better choice for you. Remember that you can always start with an FAQ then develop it into a fully-fledged knowledge base.