About TreeAge Software

The Company

TreeAge Software, LLC has been a beacon in decision analysis and health economics for over 30 years. Our team of scientists, engineers, trainers and support associates have grown and developed alongside the decision analytics community to build and refine our flagship software – TreeAge Pro.

TreeAge Software, LLC is a privately held company headquartered in Williamstown, Massachusetts.

Our Products

TreeAge Pro is the leading visual tool for creating and analyzing decision trees. Create decision trees of unlimited complexity for any type of decision.

  • TreeAge Pro Healthcare – for health economists, clinicians, researchers and HEOR professionals
  • TreeAge Pro Business – for attorneys and business analysts


TreeAge Pro software is used in a wide array of industries, including healthcare, legal, oil & gas exploration, management consulting, investing, teaching, etc.

Modeling Community

TreeAge Software has earned the trust of more than fifteen thousand modelers globally, including in the US, Europe, Latin America, Asia, Australia and Africa.