On Wednesday, OpenAI CEO Sam Altman merely tweeted “chat.com,” announcing that the company had acquired the short domain name, which now points to the company’s ChatGPT AI assistant when visited in a web browser. As of Thursday morning, “chatgpt.com” still hosts the chatbot, with the new domain serving as a redirect.

The new domain name comes with an interesting backstory that reveals a multimillion-dollar transaction. HubSpot founder and CTO Dharmesh Shah purchased chat.com for $15.5 million in early 2023, The Verge reports. Shah sold the domain to OpenAI for an undisclosed amount, though he confirmed on X that he “doesn’t like profiting off of people he considers friends” and that he received payment in company shares by revealing he is “now an investor in OpenAI.“

As The Verge’s Kylie Robison points out, Shah originally bought the domain to promote conversational interfaces. “The reason I bought chat.com is simple: I think Chat-based UX (#ChatUX) is the next big thing in software. Communicating with computers/software through a natural language interface is much more intuitive. This is made possible by Generative A.I.,” Shah wrote in a LinkedIn post during his brief ownership.