We started HubSpot three years ago based on two major changes we saw happening. The first change was that people are getting sick and tired of being interrupted with traditional marketing techniques like email blasts, cold calls, advertising, etc and are getting better and better at blocking them out using things like spam protection, callerID, DVR's, etc. The second change is that people learn and shop in a whole new way, living in Google, blogs, and social media sites like Twitter, Facebook, and LinkedIn. What we set out to do with HubSpot was to help marketers transform from interrupting their potential customers with outbound marketing (email, cold calls, ads) and instead, take advantage of the new way folks shop and learn to pull them in with inbound marketing (Google, blogs, social media, etc). Well, it turns out we had a pretty good idea as over 2,300 customers have purchased our product and over 20,000 people have purchased our Inbound Marketing book.