I'm wondering how many of the Developer positions you have advertised will include evaluations of coding ability?
And, do you out-source the evaluation to a third party or do you have an in-house test?
Probably most of them. There's no way to know for sure since there are so many companies hiring, but I can assure you that the vast majority of "real jobs" will confer a technical interview. Of those, most of the tech interviews are usually hosted in-house (in my experience).
Just do fizzbuzz if you want a broad filter. If you're feeling a little more adventurous, ask them to reverse a linked list. Many applicants will fail it. Some will fail because you'll find them pasting the exact same C solution as the other applicants despite it being a JS interview.
As an early stage startup, the answer is no. We're primarily hiring engineers, and coding ability is one of the key metrics of their success. As an early founder I find it hard to outsource the evaluation of one of key hiring decisions.