I've read comparisons of tesla's system vs others. They aren't even in the same ballpark. C&D has one with Infiniti, Mercedes, Telsa, and BMW.
They drove 50 miles on a fairly challenging road and recorded the number of times they had to grab the steering wheel. BMW and Mercedes were twice as often, infiniti about 3 times.
The #2 BMW "City streets also foil this equipment; occasionally the BMW lost the trail on clearly marked straight sections of pavement for no obvious reason at all."
The Tesla (with driving hardware 2 revisions ago, and software at least on revision ago) "the Tesla Model S locks onto the path ahead with a cruise missile’s determination and your hands resting on your lap.","The Tesla’s Autosteer performance can be distinguished from our other contenders by two words: no wobbling.", and "This system rises well above parlor-trick status to beg your use in daily driving.", "to Tesla’s credit, this is the only car capable of hands-free lane changes.", and " but by tallying only 29 interruptions in 50 miles, Tesla’s Autopilot app lives in a class of one."
So do other companies have lane following and related features... yes. Do they do as well as Tesla, not from what I've seen.