My guess? The people involved at Tailscale. Two of the founders (Avery Pennarun and David Crawshaw) are former Googler's that had a lot of respect within the company (I loved both of their G+ posts internally). Brad Fitzpatrick also recently joined them.
They are then building the security model that Google uses[0], but trying to get it to other companies. I think the concept of BeyondCorp is pretty amazing and a great way to think about trust on a network.
Those 2 points together probably gets them lots of upvotes.