Microsoft vs. IBM marketshare – a consolidated overview

Should I do it or not ? After all these yes/no discussion this week ? Nah … why not provide all believer and non believers with a consolidated overview of marketshare related information on Microsoft and IBM in the Email/Calendar and (integrated) collaboration space.

Not a discussion whether or not this or that specific analyst is credible or not. Also not if this or that report has investigated the market using the right sample size group or method.

My goal is to get all information available out on the table and proof 1 point : a trend over the last 3-4 years showing a decline in IBM’s marketshare and a growth in Microsoft’s in the same space. Let’s get all the information on the table. Not all information will be explicit / quantitative but view this as confirmation of a specific trend.

So when you feel the urge to comment do it with content, content proving your point. Disagree with a specific (subjective, non quantitative) analyst / reporter statement send me your “counter statement” …

Ofcourse I can and will not quote copyrighted content; out of these reports I will only quote what is available on the Internet in the form of summaries, online articles, etc.

This post won’t be complete the first time around so I will be adding / changing content where and when necessary …


  • Gartner Group (19-1-2007)
  • The Radicati Group (4-12-2006)
    • Corporate Email Market, 2006 – 2010 (press release / subscription required)
      “According to the study, the insourced Corporate Email market is expected to grow from 377 million mailboxes in 2006, to 513 million mailboxes in 2010. Revenue in the space is forecasted to grow from $2.5 billion in 2006, to over $3.6 billion in 2010.
    • The Corporate Email market is being driven by a number of factors, including more email users, and increased messaging traffic. The report shows growing demand for email security, mobile messaging, and Webmail functionality.

      Microsoft leads the market with its MS Exchange platform, holding roughly a 33% installed base. IBM has over a 21% combined installed base with its Lotus Domino and Workplace Messaging platforms.

  • Internet Research Group -(13-10-2006)
    • Exchange 2007 Market Adoption Analysis Report (press release / subscription required)
      “Microsoft Exchange dominates the landscape of enterprise e-mail systems and the upcoming migration to Exchange 2007 is the most important change in the market that will occur during the next five years,” noted John Katsaros, co-founder of IRG.
  • Gartner Group (25-9-2006)
    • Microsoft E-Mail Momentum Growing at IBM’s Expense (subscription required)
      “Client inquiries indicate that Microsoft is gaining momentum in the e-mail and calendaring market, and the trend appears to be accelerating. Users should focus on business requirements, not just vendor marketing claims, when making technology decisions.”

To be continued (taking a break now) …