Ranked in these QuestionsQuestion Ranking
Pro Private repositories freely available
Private repositories are free and unlimited for any user.
Pro Integrated with Visual Studio IDE
Integrated with the Visual Studio IDE for visualizing on which branch the developer is working currently and visualizes changes not committed yet.
Pro TFS and Git support
Pro Continuous integration available
Pro Project Management tools (e.g. bug tracking)
Issue management, Task planning, resource planning, scrum
Pro Full enterprise solution
Because it is a full enterprise solution, It does almost everything in the SDLC and it does it well.
Pro Gated check ins support
The code is proprietary.
Con Overwhelming complexity
Since it's made to be an enterprise product for large teams and companies, it may be overwhelming for small teams and projects.
Con Limited collaboration features
VSO is built for well-defined teams, not for open-source projects where everyone can collaborate. In order to participate in any way, a user has to be explicitly added to a team.