First off, I should mention there\'s no such thing as "the" MEAN stack or framework. The acronym (explained above) generically identifies using these technologies in combination. There are several implementations of the MEAN stack (a community fragmentation problem in itself). Meteor is actually a mature full-stack real-time web application platform (a framework plus a lot of utilities) that has been developed by a team since 2011 and has a very large .
What Meteor gives you for freeMeteor gives you a lot more out of the box. The client and the server communicate data updates seamlessly and automatically, without you having to write any boilerplate data sync code.