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Kerio Mailserver VS. Microsoft Exchange September 18, 2009

Posted by Anthony Zschusschen in Reviews.

For small to medium businesses wanting to improve email and collaboration efficiency, Kerio MailServer provides a powerful solution to more SMBs, with lower total cost of ownership (TCO) when Exchange is not an option.

3 Considerations for Total Cost of Ownership
Based on outsource IT estimates and surveyed administrators, Kerio MailServer outperformed Exchange in all three areas.

  • Kerio leads in total licensing costs
    Kerio also provides a greater return on investment (ROI) with more integrated server features, better flexibility and more frequent enhancement releases.
  • Kerio leads in hardware costs
    Kerio MailServer requires less number of new hardware compared to Windows EBS and some Exchange deployments that use multiple server roles.
  • Kerio leads in labor costs
    Labor is the largest contributor to total cost of ownership and the biggest area of saving offered by Kerio MailServer.

What costs should be considered?
There are three major costs to consider when comparing the total cost of ownership of Kerio MailServer and the various Microsoft Exchange implementations:

  • Total licensing
  • Hardware
  • Labor

Kerio Mailserver

Microsoft Exchange 2007

  • Server OS not required
  • Can also run on Mac or Linux
  • Single server with multiple functionality
    • Email Collaboration
    • Mobile email
    • Email archiving
    • Server backup
  • Single license for all components
  • Windows Server OS required
  • Additional purchase of Microsoft solutions (Forefront, additional server instances for clustering or other server roles such as Edge transport or Exchange hosted services).
  • Additional purchase of third party solutions


  • Lower OS cost
  • Less need for third party add-ons
  • Simplified licensing
  • Lower total licensing costs


  • Higher OS cost
  • Depend on third-party add-ons
  • Multiple licenses to pay
  • Higher total licensing costs


Kerio Mailserver has the flexibility of running on a non-server operating system such as Windows XP, Mac OS X and Linux. Exchange 2007 requires a Windows server, which by itself already exceeds the price of Kerio Mailserver. Microsoft Exchange 2007 may require multiple installations to implement server roles. This can add additional Exchange and Windows Server licenses, and hardware costs. Four of the server roles can be installed on the same hardware, but a separate server is required for Edge transport.

Anti-spam, anti-virus, and server backup are absolutely necessary for all mail servers. Microsoft offers Forefront security for Exchange server for $15,- per user, per year. EBS 2008 includes a one-year subscription to Forefront. Kerio Mailserver includes anti-spam protection for no additional charge. The integrated McAfee anti-virus protection is enabled in Kerio Mailserver for only $4 per user in the first year and $1.20 in the following years.

The main difference between Kerio Mailserver and Microsoft servers is the number of hardware servers needed. Exchange 2007 may require more than one server if the the server roles are applied such as Edge Transport. Kerio Mailserver only needs one server installation to perform all its functions.

For organizations that have little or no IT, Kerio Mailserver is specially designed to be easier to install and maintain, allowing organizations to focus more on their business and less on managing the server and its components.

That’s why advice Kerio Mailserver for Small and Medium sized companies with little or no in-house IT specialists. Low costs for software and hardware, easy to deploy and manage. Kerio Mailserver!



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