Taxonomy of Open Source Business Models
From a summary of a FLOSSMetrics study on 80 open source firms, summarized by Roberto Galoppini. (2007)
Report at http://flossmetrics.org/
Summary table at http://www.robertogaloppini.net/documents/businessmodels.pdf
"The 6 main clusters identified are:
the same software code distributed under the GPL and a commercial license. This model is mainly used by producers of developer-oriented tools and software, and works thanks to the strong coupling clause of the GPL, that requires derivative works or software directly linked to be covered under the same license. Companies not willing to release their own software under the GPL can buy a commercial license that is in a sense an exception to the binding clause; by those that value the “free as in speech” idea of free/libre software this is seen as a good compromise between helping those that abide to the GPL and receive the software for free (and make their software available as FLOSS) and benefiting through the commercial license for those that want to maintain the code proprietary. The downside of twin licensing is that external contributors must accept the same licensing regime, and this has been shown to reduce the volume of external contributions (that becomes mainly limited to bug fixes and small additions).
Split OSS/commercial products:
this model distinguish between a basic FLOSS software and a commercial version, based on the libre one but with the addition of proprietary plugins. Most companies adopt as license the Mozilla Public License, as it allows explicitly this form of intermixing, and allows for much greater participation from external contributions, as no acceptance of double licensing is required. The model has the intrinsic downside that the FLOSS product must be valuable to be attractive for the users, but must also be not complete enough to prevent competition with the commercial one. This balance is difficult to achieve and maintain over time; also, if the software is of large interest, developers may try to complete the missing functionality in a purely open source way, thus reducing the attractiveness of the commercial version.
a recent reinvention/extension of a previous license constraint, that is usually based on the Mozilla Public License with the addition of a “visibility constraint”, the non-removability of visible trademarks or elements from a user interface. This allows the company to leverage trademark protection, and allows the original developers to receive recognition even if the software is resold through independent resellers.
companies that created, or maintain a specific software project, and use a pure FLOSS license to distribute it. The main revenues are provided from services like training and consulting (the “ITSC” class) and follow the original “best code here” and “best knowledge here” of the original EUWG classification. It leverages the assumption, commonly held, that the most knowledgeable experts on a software are those that have developed it, and this way can provide services with a limited marketing effort, by leveraging the free redistribution of the code. The downside of the model is that there is a limited barrier of entry for potential competitors, as the only investment that is needed is in the acquisition of specific skills and expertise on the software itself.
companies that provide selection, support, integration and services on a set of projects, collectively forming a tested and verified platform. In this sense, even linux distributions were classified as platforms; the interesting observation is that those distributions are licensed for a significant part under pure FLOSS licenses to maximize external contributions, and leverage copyright protection to prevent outright copying but not “cloning” (the removal of copyrighted material like logos and trademark to create a new product). The main value proposition comes in the form of guaranteed quality, stability and reliability, and the certainty of support for business critical applications.
companies in this class are not strictly developers, but provide consulting and selection/evaluation services on a wide range of project, in a way that is close to the analyst role. These companies tend to have very limited impact on the FLOSS communities, as the evaluation results and the evaluation process are usually a proprietary asset." (http://robertogaloppini.net/2007/04/06/open-source-business-models-a-taxonomy-of-open-source-firms%E2%80%99-business-models/)