Startup Idea: Cross-Agency Real-Time Collaboration Software

Startup idea to develop a software like Google Drive, enabling cross-agency work collaboration. It would allow multiple users, even across different agencies to update, view and synchronize changes on documents or spreadsheets in real time. Compatibility with Microsoft file formats is a must.

I work for a county agency. One issue I have in my County is using systems (i.e. word, excel) that can be used cross-agency, i.e. state-county, county-county, county-federal. Because of this lack in a system, we generally send files by email. This makes it difficult to keep track of updated changes. If I find an error or need to make changes, I have to communicate to the original developer.

A software similar to google drive would be ideal. The best case scenario would be a system that allows multiple users across agencies (or even private) to update a document or excel-style file and see the changes in real time. This does not have to be in Microsoft, as long as it could be saved as a Microsoft file and could be opened in Word, Excel, or other.