TabNine is a different approach that uses far less semantic information than Kite. It really shines when you're talking about syntactic repetition, e.g. if you check out the screenshots on their homepage. They have a page about semantic completions, but the semantics are very shallow -- basically what attributes are on the instance you're accessing.

In contrast, we've spent ~50 eng-years semantically indexing all the code on Github, building statistical type inference, and rich statistical models that use this semantic information in a very deep way. The result is that Kite can help more often, in ways that reflect a deep understanding of the semantics of the code you're writing.