Two top market research firms, Gartner and IDC, have published new reports showing IBM lost yet more e-mail market share to Microsoft in 2004.
Both research firms now say Microsoft Exchange is king of e-mail, a market Notes once dominated with more than a 60% share.
IDC says sales of Exchange grew 23% in 2004, to $950 million, while Notes sales grew 5% to $745 million. By the end of 2004, Exchange held 51% of the market, versus 40% for Notes, IDC says. Thatís a wider gap than in 2003, when IDC estimated Exchange held a 47% market share versus 43% for Notes.
Gartner estimates Exchange now has a 48% market share versus 45.2% for Notes.