umbraco is licensed under the open source license GPL, which means that any enhancements or software where umbraco is a necessary part should be licensed under the GPL as well.
For companies or organisations that wishes to use umbraco, but don't want to license their enhancements under the GPL or companies that wishes to use part of umbraco in their system, we're selling a commercial license.
The license is available at a pr. server version priced at DKK 6.000 (around $1050, €800, £550). Enterprise/oem versions and volume discounts (for more than 50 licenses) are available.
For more information please contact Niels Hartvig through email (nh@umbraco.dk) or phone +45 70 26 11 62.