I've personally used ReplyAll to interview Mark Cuban http://abovethelaw.com/2015/05/a-conversation-with-mark-cuban/ discuss depression with Brad Feld https://blog.replyall.me/a-conversation-about-depression-with-brad-feld/and debate David Frum on marijuana legalization http://abovethelaw.com/2015/05/is-legalizing-pot-a-bad-idea-a-published-email-exchange-with-david-frum/

Our homepage is www.replyall.me

Why we built ReplyAll: my cofounder & I used to exchange lengthy emails every day about important topics, and we lamented the fact that we didn't have an easy way to publish these conversations. Then we saw some of our favorite writers like Sam Harris & Glenn Greendwald doing just that: publishing their email exchanges as content.

http://www.samharris.org/blog/item/dear-fellow-liberal2

So we built ReplyAll to make it easy to publish this content (no manual cutting and pasting out of emails) and allow readers to follow along like a fly-on-the-wall as the conversation unfolds. Participation is asynchronous, so no one has to coordinate schedules. It is an easier, better way to create interviews & debates, and ReplyAll conversations get great engagement in both time on page (10 minutes plus) and repeat visitors (2.3 page views per unique).

Happy to answer questions about the platform, business model or failing to close the deal at our YC interview in April.