building proprietary tools

The best hope for sustaining HLN as an open source vendor is the customization model: when an agency needs a new feature or a customized clinical decision support rule, it contracts with HLN to develop it. Naturally, the agency could contract with anyone it wants to upgrade open source software, but HLN would be the first place to look because they are familiar with software they built originally. Other popular models include offering support as a paid service, and building proprietary tools on top of the basic open source version (“open core”). The temptation to skim off the cream of the product and profit by it is so compelling that one of the most vocal stalwarts of the open source process, MariaDB (based on the popular MySQL database) recently broke radically from its tradition and announced a proprietary license for its primary distinguishing extension.

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