9Folders (9Folders, Inc., 9Folders) was founded in September 2013 and consecutively released Nine for Android v1.0 (Google Play) in January 2014, Nine Work for AppConnect in October 2015, Nine Work for Android Enterprise in August 2016, Nine Work for Intune (Google Play) in November 2016, and Re:Work for Android and iOS in March last year to the app markets. 9Folders has been recognized as a noteworthy app in the Android Activesync client market through the Nine app for the time, and has popular products in various languages(24 languages for Nine, 12 languages for Re:Work) and used by hundreds of companies around the world. We are currently launching a new Re:Work app, providing secure mail and a powerful Activesync email client app optimized for the mobile environment. From 2019 to 2023, it was also selected as the best Android app 100 by PC Magazine every year. Moreover, 9Folders' enterprise development framework enables customization that can be optimized for the business environment, so it has the advantage of enabling customer-specific development in a short time, which other mobile mail products cannot easily do. Customers can see the effect as if it were an internal product developed by their own in-house development team, and receive support for a mobile work environment optimized for Microsoft and Google's corporate work environment.