Currently I’m an Outlook 2003 user, but as I look towards the future, I can’t help but wonder if Thunderbird won’t eventually be my desktop E-mail client. Version 2.0 of their popular open source E-mail client is in the early stages of beta and is already gaining in popularity. At the same time, Microsoft’s upcoming release in two weeks of Microsoft Office 2007 will include their newest version of Microsoft Outlook.

With the exception of the new ribbon and some appearance changes, their doesn’t seem to be a lot of reasons to spend hundreds of dollars upgrading to the 2007 version of Microsoft Outlook. On the other hand, Thunderbird is powered by the open source community and will continue to receive improvements after its eventual release.

Ryan over at CyberNet News has posted a good comparison of the two products in an effort to determine which product will wear the mythical crown.

Are you willing to spend the money to upgrade to Outlook 2007, or will you be using Mozilla Thunderbird’s free alternative?