Ask HN: What's your favorite startup logo?

Hipmunk has an awesome logo/mascot.

The Github Octocat is also awesome :)

https://octodex.github.com/

I think the best ones manage to have a simple, clean aesthetic but are representative of their brand and offering.

A couple of my favourites: Birchbox (birchbox.com), Treehouse(teamtreehouse.com), Intercom (intercom.io)

I think Shutl's little rocket ship is kind of cute.