Google's Gmail has captured less than 1% of the enterprise e-mail market, according to Gartner's latest report on e-mail systems.
Gartner estimates that Google Apps Premier Edition has between one million and two million users, but that still gives Google less than 1% of the overall enterprise e-mail market.
This is mainly due to the fact that most Google Apps enterprise customers have only around 50 users, making the total number of business users relatively small, the research firm said.
Gartner's estimate shows just how far Google is from catching Microsoft as the primary provider of business e-mail, according to US reports.
Microsoft has by far the largest share of any supplier and well over half the market for enterprise seats, according to Gartner.
Microsoft continues to prosper in the e-mail market with both its on-premises and cloud options, and longer term, Gartner predicts the introduction of numerous hybrid e-mail models from Microsoft, with some mail boxes live in the cloud and others live on-premises.
However, Google remains Microsoft's closest competition and has made some progress with Gmail in the past year, said Gartner, including support for a native connection to the Microsoft Outlook client and a more comprehensive approach to managing and securing mobile devices.