Are chatbot and ChatGPT the same?

Could you please clarify for me if chatbots and ChatGPT are indeed one and the same? I've heard both terms being used interchangeably, but I'm curious to understand if there's a subtle difference or a specific distinction between the two. ChatGPT seems to be quite popular lately, so I'm wondering if it's just a popularized version of a chatbot or if it has unique features that set it apart. Thank you for your clarification!