The commercial open source software (COSS) model has flipped the traditional SaaS sales process on its head, often making the same (or an approximate) product as a SaaS solution available to developers for free via open source. Marketers now must delineate clearly between open source and commercial offerings. Furthermore, marketers seemingly compete against their own open source offerings when convincing users to convert from open source to paid enterprise solutions. In short, commercial open source software forces marketing to reevaluate their assumptions about B2B software marketing.