Data rooms take all shapes and designs when trying to figure out the best way to share your data when undergoing an M&A transaction. Some of the mid-level brokers and investment bankers I've noticed just default to Google Drive and Dropbox to share files. Here are 3 other good ones that come highly recommended:
https://digify.com/ - Document security to easily control access and distribution of your files and virtual data rooms.
https://www.idealsvdr.com/ - Has offices in London, Hong Kong, and New York so fits the biggest locations for M&A transactions and bankers. Doesnt tell you the price on the site
https://www.datasite.com/us/en.html - Has a whole suite of services outside of just data room uploading and downloading.