AI is a hot topic, and just about every major tech company has departments developing various forms of AI and working on AI related challenges. Who is most likely develop a true AI system?
The definition of a true AI system is obviously up for debate, but for the sake of this conversation let’s assume we are talking about "Artificial General Intelligence".
Artificial General Intelligence (AGI): Sometimes referred to as Strong AI, or Human-Level AI, Artificial General Intelligence refers to a computer that is as smart as a human across the board—a machine that can perform any intellectual task that a human being can. Creating AGI is a much harder task than creating ANI, and we’re yet to do it. Professor Linda Gottfredson describes intelligence as “a very general mental capability that, among other things, involves the ability to reason, plan, solve problems, think abstractly, comprehend complex ideas, learn quickly, and learn from experience.” AGI would be able to do all of those things as easily as you can. 
I’ll put the top candidates in the comments for you to vote on, and leave replies under each candidate with your reasoning. If you have another candidate, please add it as a main comment.