Hadn't heard of mytag, but just checked it out. Looks like a mobile only solution for selling things.
Hubify is different because you can rent anything and also list services for hire and jobs.
The ability to create and manage public or private hubs is unique and better suited to serve different types of local communities, college campuses, etc.
We have Pinterest-style personal storefronts, user ratings/reviews, and will soon offer criminal background checks to improve safety.
If you know of any other #craigslistkiller competitors, I'd love the tips. It's a real "obvious" problem, so of course there will be other startups trying to solve it in their own way.
Thanks for the feedback!