Dual licenses and open source: Best of both worlds?

Dual licenses in open source provide the best of both worlds: open software without the requirement to open source one's own code.

Most enterprises needn't worry about the "viral" aspect of open-source licenses. Because most enterprises use software for internal purposes, rather than distribute it, they don't trigger the standard open-source requirement to contribute back derivative works. A recent Federal Computer Week article by John Moore does an admirable job of clarifying this.

There are, however, instances in which an enterprise might well trigger the contribution requirement of open-source licensing. If a company sold off a division to another company, complete with the servers running modified open-source software, this would likely trigger a "distribution" and might well affect the value of the deal.

For this and other instances, it's helpful to have a dual-licensing strategy. In this way, customers get all the benefits of open source, especially the ability to view and modify source code to suit their particular needs, without the obligation to contribute back derivative works.

Unfortunately, this perpetuates the problem that Jim Whitehurst of Red Hat has been highlighting : the more software created in isolation, the greater the industry's inefficiency and the higher the cost of software. Dual-licensing doesn't solve this problem. It is, however, a good way to help guide enterprises into open source on comforting terms.

Tech Culture
About the author

    Matt Asay is chief operating officer at Canonical, the company behind the Ubuntu Linux operating system. Prior to Canonical, Matt was general manager of the Americas division and vice president of business development at Alfresco, an open-source applications company. Matt brings a decade of in-the-trenches open-source business and legal experience to The Open Road, with an emphasis on emerging open-source business strategies and opportunities. He is a member of the CNET Blog Network and is not an employee of CNET. You can follow Matt on Twitter @mjasay.


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