Ohloh is a cool tool that analysis Open Source projects code.
Many information is available such as the number of contributors over the last twelve months:
“Over the past twelve months, 90 developers contributed new code to eXo Platform.
This is one of the largest open-source teams in the world, and is in the top 2% of all project teams on Ohloh.
For this measurement, Ohloh considered only recent changes to the code. Over the entire history of the project, 92 developers have contributed.”
This is close to the Firefox size team and of course outperforms the competition:
“Over the past twelve months, 97 developers contributed new code to Mozilla Firefox. ”
The next graph shows the number of contributors to the projects over the last years, as you can see, Liferay Committers + Alfresco committers < eXo committers (note that Liferay + Alfresco offering is included in eXo stack)
This trend is also confirmed by the number of commits made over the last years for each projects.
Several other information are available like the project cost:
In other words, if you would have to produce the same amount of work (and that does not valuate the innovation here) you would have to spend 12M$…in the US
or the languages used,