Notably Signal employees do not get equity, so the salary must be higher to remain competitive.
Signal is probably the hardest class of product to build. Name an optimization/distributed systems problem, they probably have it. And quite literally, a Signal bug could jeopardize an activist/journalist’s life.
So for a <$200k salary and no equity, how many world-class engineers do you think you could hire?
I simply wouldn’t trust the product, if it had mediocre engineers.