Ask HN: Examples of non-open-plan tech offices?

What are some good examples of technology companies without open-plan offices?

I'm in a battle at work to make the new floor for the engineering department be not (entirely, at least) open-plan. I have all the arguments marshalled, but I am struggling to provide good examples of tech companies that use traditional offices.

What are some strong examples I can offer? Modern startups would be especially useful.