As someone who has organized several conferences, and countless events in the tech space, let me just say that it is REALLY hard to find and get top-tier/well-known women to speak at your event. I reached out to over a dozen women execs from 10+ startups that were well known and all of them turned us down for this last conference I helped organized in Miami in February.

Part of the issue is that you need well known speakers to sell more tickets, that coupled with the fact that the % of women working in tech is a minority, you're left with a shallow pool of possible speakers. Furthermore, if you're looking for certain skill-sets in tech to be speakers, you're further diminishing your pool of available candidates.