This is a very good question, and should be discussed within the context of:
- disintermediation, vs
- reintermediation vs
- countermediation
The short answer to your question is that the difference between "reintermediation" and "countermediation" has to do with the ownership of the new intermediary (or marketplace). When a company reintermediates, it is simply engaging with new intermediaries, or intermediaries that it has previously disintermediated. If a company countermediates, it is not just reintermediating, but is also actively investing in the creation of a new intermediary that it owns.
Examples of reintermediation:
- The use of new e-intermediaries such as Adsense/Adwords for online marketing
- The use of new e-markets such as Elemica or Alibaba.com for e-sourcing (buyers' point of view) or marketing and sales (sellers' point of view)
- The use of new e-intermediaries for payment (Paypal) or identity authentication (Verisign). These new intermediaries are needed for companies to function properly as e-businesses, even as they have disintermediated other traditional intermediaries such as retail stores.
Examples of countermediation:
- Johnson & Johnson and other pharmaceutical companies coming up with their own e-markets to sell hospital supplies to hospital customers. This is to counter and mitigate the competitive threat of Baxter's e-market ASAP Express.
- Ford, GM and Daimler-Chrysler coming up with Covisint.com (buyer-oriented e-market) to act against suppliers with strong market power.
- Amazon.com coming out with its own Appstore instead of relying on Google's Playstore.
The whole idea about countermediation is about controlling key elements of a supply chain (and gain monopolistic power yourself), or to prevent a competitor from gaining monopolistic positioning in any of the 5 Forces.
A follow on question that is worthy of deeper discussion is: Is countermediation or reintermediation more important than disintermediation in e-business?
What are your thoughts on that?