The Skype app officially ceased operations on May 5. Microsoft announced that all Skype accounts and users' chat histories will be transitioned to the Microsoft Teams app. Skype users can upgrade to the complimentary version of Microsoft Teams, which retains most of Skype's features and introduces new functionalities. Users can sign in to Microsoft Teams Free using their existing Skype credentials, with contacts and chat histories automatically transferred. A notification will guide users through the migration process. Users who do not adopt Microsoft Teams Free can save their Skype data. Skype was launched in 2003 by Niklas Zennström and Janus Friis and was acquired by Microsoft in 2011 for .5 billion. Microsoft introduced Teams in 2017 as a collaboration platform based on Skype.