fman build system

fbs Pro

Unleash the full power of your code.

The free version of fbs has several limitations. Upgrade to Pro to unlock its full potential. Upon purchase, you'll receive a hosted package that you can install just like fbs. No messing around with license keys. Just pip install and you are done.

  • Support for the latest versions of Python, PyQt6, PySide6 and PyInstaller.
  • All features marked Pro in the Manual.
  • No GPL restrictions: Use fbs in commercial projects.

To get fbs Pro, please select your preferred edition:



  • For all developers on a team
  • 30 minutes email support
  • 1 year of updates
  • 30 day money back guarantee
  • Buy for € 299


  • For all devs in your company
  • 1 hour of email support
  • 1 year of updates
  • 60 day money back guarantee
  • Extra procurement support
  • Buy for €799

fbs Pro saves you weeks of painful development time:

One of the first organizations to purchase Pro was NASA's Jet Propulsion Laboratory:

If they can use it to reach the stars, then you will find it useful too 🚀!

Frequently asked questions

Is this a subscription?
No. It's a one-time payment that lets you use Pro forever.
What do I receive upon purchase?
You'll get a URL to a Python package that you can install with pip in seconds.
Do I have to manage license keys?
No. Just run pip install on your development machine(s) and you are done.
Am I allowed to use Pro for multiple applications?
How often can I download Pro?
The Hobbyist edition lets you download Pro once. The Startup edition lets you download it 30 times per month. This way, you don't have to maintain your own copy of Pro. The Enterprise edition can be downloaded 100 times per month. This can be useful in CI environments.
Can I make a backup copy?
Yes. Just don't share it with people outside your organisation.
What does "No GPL restrictions" mean?
When you use fbs, its GPL license normally requires you to also make your own code open source under the GPL. Buying Pro lifts this requirement. This is usually very important for commercial projects.
How do I get an invoice?
Click on the Generate invoice link in the confirmation email.
How do I get in touch with you?
The best place to get help with technical questions is fbs's issue tracker. For other queries, you can email me at .