Virtustream

•  Virtustream is an enterprise cloud computing management software provider for enterprise customers, IT service providers and government agencies.
• The startup launched in 2008 and was acquired by EMC in May 2015.
• Inc reported that Virtustream sold for $1.2 billion.
• Virtustream remains active today and counted Heinz, Kawasaki and Lexmark among its enterprise customers.
• The company was included in Inc's list of "13 Tech Companies Sold for More Than $1 Billion".

Skype

• While Skype is primarily a telecommunication tool, it also offered an enterprise versions called Skype for Business.
• Skype for Business allowed businesses to call, send instant messages, hold online meetings, and share files.
• According to Pitchbook, Skype was the 4th fastest company to achieve a unicorn exit by 2015.
• It only took 26 months for Skype to achieve a $2.5 billion exit in October 2005 through merger and acquisition.
• It followed in the wake of other unicorn exits such as YouTube (21 months), Juno Therapeutics (24 months), and Oculus VR (24 months).

Sourcefire

•  Sourcefire provides cybersecurity services to enterprise IT infrastructures.
• It was launched in 2001 and was acquired in July 2013.
• Cisco bought the startup for $2.7 billion.
• The company remains active today and services companies in the healthcare, financial, manufacturing and energy industries among others.
• Sourcefire was included in Inc's list of "13 Tech Companies Sold for More Than $1 Billion".