Gmail : 1 million de clients professionnels
Sur le blog de google :
Gmail’s reliability jumps to more than 10 times more reliable than an Exchange-based solution if you factor in the planned outages inherent in on-premises messaging platforms … Compared to the costs of Microsoft Exchange, IBM Lotus or Novell GroupWise — including software licensing, server expenses and the labor associated with deploying, maintaining and upgrading them on a regular basis — Google Apps leaves companies with much more time and money to focus on their real business.
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More than 1 million businesses have selected Google Apps to run their business, and tens of millions of people use Gmail every day.

[...] économique (bien avant la mobilité et la sécurité) explique probablement en grande partie le succès fulgurant du service auprès d’un million d’entreprises (dont la société [...]