In just a couple of months, the question-and-answer chatbot ChatGPT has become so popular that it’s not unusual for users to see a message saying it’s at capacity and can’t handle any more queries. According to UBS, ChatGPT was averaging about 13 million visitors per day by the end of January.

OpenAI, the San Francisco-based startup behind ChatGPT, has some big backers including LinkedIn co-founder Reid Hoffman and Khosla Ventures. Microsoft also has invested in the company and has reportedly considered adding ChatGPT to its Bing search engine.

“Unlike some of the other hyped technology sectors in the past few years, this has a very real application both for individuals and for enterprises right now,” Forrester analyst Rowan Curran told CNBC.

Chatbots have been around for a while, but most have been tailored toward very specific tasks such as answering basic customer service questions about your phone bill. ChatGPT is much more sophisticated due to the wide-sweeping data on which it has been trained.