Robots, smart speakers, and 'artificial intelligence' are usually the first things that come to mind when you hear the word 'AI.'
Surprisingly, .ai is a country code-level domain that wasn't designed expressly for artificial intelligence. So, where do .ai domains come from? This country extension is used by residents of the Caribbean island of Anguilla – in other words, the government of Anguilla owns this TLD!
Despite the fact that the .ai domain is a ccTLD, it is now utilized by technology and IT organizations all over the world in the same way that a gTLD is, by artificial intelligence firms.
The adaptable .ai extension can also be used as a 'domain hack.' This is where you can generate a word or phrase by combining the second-level domain with the top-level domain ending.
As you can see, it is quite popular and “successful” so to speak. That said, you still need a place to find a reliable .AI domain and from personal experience I can tell you that you won't find a better place than Nominus. You can find their .AI domains here - Nominus Anguilla Domains