Such service doesn't have a natural gender discrimination so it's actually additional work to create one. Sure, it might be worth to focus on marketing it to women, if indeed they get "disproportionately large share" of abuse (it sounds plausible to me, but I don't have data) - but there's no need for artificially limiting the service itself. Male privacy nerds would happily use it too.
Nobody asked that the service to be limited to women. That's something you're adding to the conversation. So it seems to me that you're politicizing it even more.
I am speaking of two separate things: a commercial product and a nonprofit that gives away free subscriptions to the commercial product. Although now that you mention it, if some sort of existing nonprofit focusing on diversity in tech built a service, that would also be something I'm glad to support.
One easy way to tell that I didn't want guys excluded from the service: I said I wanted to subscribe, and I am a guy.
Such service doesn't have a natural gender discrimination so it's actually additional work to create one. Sure, it might be worth to focus on marketing it to women, if indeed they get "disproportionately large share" of abuse (it sounds plausible to me, but I don't have data) - but there's no need for artificially limiting the service itself. Male privacy nerds would happily use it too.