According to their website, Dataroom software provides an secure platform for the storage and sharing documents. They offer features such as secure access control, drag and drop uploads of files using any browser on the internet and search functionality for text and file types and dedicated project managers. They also provide statistics on user activity as well as folder and document views and document downloads. SmartRoom claims to have been used in « multimillion dollars or euros M&A transactions » and offers speed, service, and security.
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https://dataroom-software.org/how-to-use-a-virtual-data-room-for-the-due-diligence-process