How much does it cost to have a chatbot?

I'm curious to know, what kind of price range can one expect when it comes to developing a chatbot? Are there different factors that can impact the cost, such as the complexity of the chatbot's functionality or the level of customization required? Additionally, is it possible to find affordable solutions for smaller businesses or individuals who might not have a large budget for this type of technology? It would be great to get a general idea of the costs involved in creating a chatbot.