It's free during the beta... and someday we'll start charging. There's nothing more I can say you now except:

- We are validating the pricing, and it will cost like any other SaaS (different plans segmented on features and affordable [monthly fee like 1-2 hours of typical salary outside SiliconValley :D]

- If you are in the Hackathon, we will forget to send you any invoice during some months ;)