The open-source world is revolutionizing industries, and the Architecture, Engineering, and Construction (AEC) sector is no exception. One of the most intriguing projects in this space is Bonsai, a next-generation IFC-native authoring tool that evolved from the BlenderBIM Add-on. Many people ask: Is Bonsai really free forever? Let’s break it down.
The Legal and Business Framework of Bonsai
Bonsai operates under a dual open-source licensing model:
- LGPL (Lesser General Public License) – Covers the IfcOpenShell library that Bonsai is built on.
- GPL (General Public License) – Covers Bonsai itself.
What Do These Licenses Mean?
- Bonsai is Free Forever: The GPL license ensures that Bonsai will always remain free and open-source.
- Companies Can Sell and Modify Bonsai: Businesses can modify, rebrand, and even sell Bonsai legally. However, they must provide the modified source code to users.
- No One Can Revoke Access: Once you download Bonsai, you own that version permanently, even if the project ceases development.
- Collaboration is Encouraged: Any improvements made to Bonsai must also be shared openly, fostering a community-driven development model.
Can Bonsai Become a Paid Product?
No, and here’s why:
- GPL ensures transparency: Anyone who buys a modified version of Bonsai can legally share it for free.
- The license cannot be changed without unanimous agreement: Over 200 contributors have worked on Bonsai, and all of them would need to agree to any license change.
- The software can always be redistributed: Even if Bonsai were to start charging for downloads, anyone with a copy could legally share it for free.
How Can Businesses Profit from Open-Source Software Like Bonsai?
While Bonsai itself is free, companies can still make money in various ways:
- Offering support and training services – Providing premium customer support for Bonsai users.
- Custom development – Businesses can build specialized features for their own needs.
- Cloud hosting and integrations – Charging for cloud-based collaboration features.
- Enterprise solutions – Offering tailored solutions for large firms.
How is Bonsai Financially Sustainable?
Bonsai is primarily supported by donations and community funding. Currently, the project receives around $3,000 per month, allowing developers to maintain and improve the software. With increased adoption, this funding could grow, ensuring Bonsai’s long-term sustainability.
What’s Next for Bonsai?
As Bonsai’s user base grows (currently estimated at 880,000+ downloads per year), its financial model may evolve. Potential future developments include:
- More enterprise support services
- A broader developer ecosystem
- Greater integration with industry workflows
Conclusion: The Power of Open-Source BIM
Bonsai represents a major shift in how AEC software is developed and distributed. Its open-source nature ensures that it remains accessible, transparent, and community-driven, unlike proprietary BIM tools. Whether you are an architect, engineer, or software developer, Bonsai provides an opportunity to participate in shaping the future of openBIM.
If you believe in open-source BIM software, consider contributing through funding, development, or simply spreading the word!
You can check out the video from BIMvoice discussing this below.