Older chatbots followed fixed scripts and only understood certain questions. A chatbot built on a language model understands everyday words and can answer questions nobody foresaw. The risk is that it makes things up when it does not know.
The chatbot on activator.se answers from the site's published content and shows where the answer comes from. In our evaluation it found the right source in 18 of 20 questions. It also has caps on how many questions a visitor may ask and what it may cost per day.
Since August 2026 the AI Act requires a chatbot to say that it is an AI. It is one of the easiest requirements to meet but is easily forgotten.