This is a topic which has come up on one of our internal mailing lists at work. It brought up some interesting info which I thought I would share.
Here was the question:
A client is looking at Open Source messaging as opposed to Microsoft Exchange. We want to provide a comparison and are building a presentation around this.
And the response:
- You can not compare a product vs an idea. Open Source is not a product.
- Open Source says, you are able to have a look into the code and change it if you are able to .
- Open Source products are not free of cost by default.
- Support is not free of costs
- Implementation and customizing is not free of costs
Following links compare exchange and certain open source products
- Exchange zu OpenExchange (www.novell.com/products/openexchange)
- Exchange zu Zafara (www.zarafaserver.de)
- Exchange zu Scalix (www.scalix.de)
- Exchange zu TeamXchange (www.teamxchange.de)
- Exchange zu Kolab (http://www.kolab.org/)
From my point of view it make sense to have a look to the rest of the environment and look for possible problems, advantages or disadvantages
– Operating system, mobile clients, infrastructure and integration, 3rd party, user agents,
Hope that is of use.