When embarking on a new software project, one of the critical decisions you’ll face is selecting the right open-source license. The choice can significantly impact how your software can be used, modified, and distributed. Two of the most popular open-source licenses are the BSD (Berkeley Software Distribution) license and the GPL (General Public License). Each has its own philosophy and implications for your code. In this blog post, we’ll compare these licenses to help you determine which one might be the best fit for your project.

The BSD License: Freedom with Few Restrictions

The BSD license is known for its permissiveness. It originated with the Berkeley Software Distribution, a Unix operating system derivative. The license is minimalistic and designed to provide maximum freedom to users. Here are the key characteristics:

Key Features of BSD License

  1. Permissiveness: The BSD license is very permissive, allowing almost unrestricted use of the code. Users can modify, distribute, and even incorporate the code into proprietary products without much obligation.
  2. Minimal Requirements: The main requirements are to include the original copyright notice and disclaimers of liability in all copies or substantial portions of the software.
  3. Compatibility: Because of its permissiveness, the BSD license is highly compatible with other licenses, both open-source and proprietary.

Pros and Cons of BSD License

  • Pros:
  • High flexibility for developers and companies.
  • Encourages widespread use and adoption.
  • Simplifies integration with other projects.
  • Cons:
  • Limited protection against proprietary use of the code.
  • No guarantee that improvements will be shared back with the community.

The GPL License: Protecting Freedom Through Copyleft

The GPL, created by the Free Software Foundation, is designed to ensure that software remains free and open. The GPL uses a concept known as “copyleft” to require that any derivative work must also be distributed under the GPL.

Key Features of GPL License

  1. Copyleft: The defining feature of the GPL is its copyleft provision, which mandates that any modified versions of the software must be distributed under the same license.
  2. Source Code Availability: Any distributed software under the GPL must make the source code available to recipients.
  3. Compatibility: GPL’s strict requirements can make it incompatible with some other licenses, especially proprietary ones.

Pros and Cons of GPL License

  • Pros:
  • Ensures that software and its derivatives remain free and open.
  • Encourages contributions back to the community.
  • Provides strong legal protection for the rights of users and developers.
  • Cons:
  • Can be restrictive for commercial use and integration with proprietary software.
  • May limit adoption in environments where mixing with proprietary software is necessary.

Choosing Between BSD and GPL

The choice between BSD and GPL depends largely on your goals and philosophy as a developer or organization.

When to Choose BSD

  • Flexibility: If you want maximum flexibility for how your software can be used, modified, and distributed, the BSD license is a good choice.
  • Broad Adoption: If you aim for your software to be widely adopted, including in proprietary environments, BSD’s permissiveness can be beneficial.
  • Minimal Restrictions: For projects where minimal legal overhead is preferred, the simplicity of the BSD license is advantageous.

When to Choose GPL

  • Protecting Freedom: If your priority is to ensure that your software and its derivatives remain free and open, the GPL’s copyleft provision is crucial.
  • Community Contributions: If you want to foster a collaborative environment where improvements are shared back with the community, the GPL encourages this through its requirements.
  • Legal Protection: For projects that need strong legal protections for user freedoms, the GPL provides a robust framework.


Both the BSD and GPL licenses have their strengths and ideal use cases. The BSD license offers flexibility and minimal restrictions, making it suitable for projects that aim for broad adoption and integration with proprietary software. On the other hand, the GPL license ensures that software remains free and open, fostering community contributions and protecting user rights.

Carefully consider your project’s goals, your philosophy on software freedom, and the potential implications for your code’s use and distribution when choosing between these licenses. By doing so, you can ensure that your project aligns with your values and achieves its intended impact.


An amateur radio operator, military veteran, jack of all trades and master of none.

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