BlackBerry CEO writes letter reassuring enterprise customers

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In an open letter to customers, BlackBerry interim CEO John Chen said Monday that he wants to "set the story straight" about the company's commitment to its enterprise business.

"We're going back to our heritage and roots—delivering enterprise-grade, end-to-end mobile solutions," he wrote.

BlackBerry is "very much alive, thank you," added Chen in the letter.

Chen said reports of BlackBerry's demise are "greatly exaggerated," and he reiterated its dedication to multiplatform mobile device management and enterprise mobility management.

"Our 'for sale' sign has been taken down, and we are here to stay," the letter said. "The investments you've made in BlackBerry infrastructure and solutions are secure."

A former CEO at Sybase, Chen was appointed to his post last month.

(Read more: Meet 'Good,' the new BlackBerry killer on Wall Street)

Bold changes at BlackBerry

Competitors are attempting to entice customers to leave the BlackBerry Enterprise Server in favor of Apple or Android devices.

(Read more: Exit light burns bright at BlackBerry)

"Our competitors want you to think that BES only manages BlackBerry devices and that we are somehow more expensive than other MDMs. This is false," he said. "We've been investing in enterprise mobility management—for any device."

Last month, BlackBerry revealed that it had completed a $1 billion private investment deal with Fairfax Financial and other institutional investors.

The company's stock was up 7 percent Monday afternoon, trading near $6 a share.

—By CNBC's Karma Allen