BrainSell found a stark contrast in price range, as well as one product that only offered similar features with a costly add-on module. Other differences included email limit, Microsoft Outlook integration, SEO tools, and real time sales alerts. Download BrainSell's free white paper via their blog (http://www.brainsell.net/
BrainSell frequently does whitepapers, webinars, and blog posts relating to the inbound marketing and marketing automation ndustries. They have also done in-depth comparisons between Hubspot & Pardot.
These whitepapers analyze price, deployment, ease of customization, user interface, add-on applications, and many other features. If your company uses or is thinking of using marketing automation software, the white papers are a must read.