Can a real estate chatbot follow up with old leads in my database?

Yes, and for most teams the old database is the cheapest lead source they own. A chatbot can restart conversations with contacts who went quiet a year or two ago, ask whether they are still looking, and pass the ones who answer back to an agent. The people who say no simply get marked, which cleans your list at the same time.

Keep the outreach honest and low-pressure. A short message referencing what they were originally looking for works better than a generic blast, and anyone who asks to be left alone should be removed on the spot. Expect a modest reply rate; on a database of several thousand old contacts, even a small percentage is a full pipeline.