Tech start-ups founded by women are few and far between, but they're highly attractive to female and male candidates who don't want to join a boys' club. My best experiences have been working with, or for, women. I stumbled on these companies purely accidentally tho. I wish there was a list of companies that have a better-than-SV-average rate of women.
That's a list that I would like to see, as well. If there's a strong interest, I would be willing to collaborate on creating and maintaining one.
Companies with better-balanced workforces deserve to be recognized.