Welcome to Silver Fir Software

Silver Fir Software is an independent company focusing exclusively on improving user productivity for radiation transport simulations. Monte Carlo and deterministic radiation transport solvers are mostly developed by government agencies, with a heavy emphasis on numerical methods and little attention to improving the user experience. Our principal goal is to help organizations get the most out of their radiation transport simulations by developing user friendly software to simplify and improve the analysis cycle.


Simplify your workflow with MCNP using Attila4MC or design and verify with the Attila deterministic solver. See more

Virtual Training

Learn more about our customizable “hands-on” virtual workshop where we help incorporate your model with our software.


Publications and reports that will help expand your knowledge on unstructured mesh radiation transport calculations.

Request a Quote

Learn more information about our pricing options.

Get a one-on-one online demo

Send us your model or see an instructive model built by us.

Request a virtual training

For current users, let’s get started with your virtual training today!

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