Glassdoor is heavily skewed towards older data points and hence underestimates significantly given the sharp rise in comp in the last few years.

> Why is this so different than Glassdoor?

Not sure about this, but IIRC Glassdoor is not systematically gathered, and so doesn't support generalization to any population other than “people who choose to provide info to Glassdoor.”

Glassdoor is radically out of line with systematically gathered data like BLS data.

Glassdoor doesn’t look at stock grants as income.

Missing stock grants and RSUs, which make up a majority of Big 4 total comp.

I suspect Glassdoor mostly gets money from employers so it reflects what they like to see =)

One reason is that Glassdoor doesnt deprecate old data (or at least gross it up by CPI)

Probably because glassdoor averages out compensation over all years despite tech wages continually growing and thus they are weighted down by old data.

IIRC Glassdoor is salary, not total comp.