I have worked with Watson and now working on Ask. I can guarantee that it is much better and more accessible. Slite is uniquely positioned as it has been an opinionated knowledge base from the beginning.
But don't take my word for it; you should sign up for the beta and give it a try :)
Slite's new AI assistant – Ask – answers questions based on your team's documentation. Take the pain out of finding info, learning from the past, and getting new team mates up to speed. Have a question? Just ask.