Pedestrian movement clarity without complexity

Simulate evacuation and general pedestrian movement in stadiums, hospitals, skyscrapers, public transit, and more.

Is your pedestrian simulation tool easy to understand?

Building geometry from scratch is expensive.
Designing models from a black box is frustrating.
Producing results without advanced tools takes too long.

View Pathfinder Features

Create accurate, flexible, and professional pedestrian models

Import CAD geometry

Import the architect's model in seconds. Automatically detect BIM data and intelligently generate the navigation mesh, building objects, and textures. Easily understand and navigate your model.

Design models intuitively

Begin with people, doors, and navigable space. That's all it takes to start your first Pathfinder simulation. Layer in dynamic behaviors, complex profiles, and detailed geometry one step at a time.

Combine ingress and egress

Design a start-to-finish occupancy scenario. Occupants can enter the space with realistic adaptive behaviors. Building alarms can trigger and control evacuation procedures. All in the same model.

Deliver professional results

Put the worries of an AHJ to rest. Answer all of their questions with unprecedented clarity by creating plots and videos with advanced controls and information overlays.

Image for Training and support ready to help you advance

Training and support ready to help you advance

Start delivering better results now

  1. Download now
  2. Learn the fundamentals
  3. Deliver results

Evacuation, social distancing, and crowd management

Model a safer world

Pathfinder delivers agent-based simulation through an intuitive interface to output clear and detailed results.

Each occupant in a Pathfinder model is aware of their surroundings and constantly recalculates their next step based on present information. These decisions are informed by academic research and validation testing. This process allows the Pathfinder simulation engine to model realistic human behavior.

  1. Thunderhead Engineering partners with leading researchers and hosts premier events to promote further development of pedestrian movement understanding.
  2. We validate and publish our own tests of Pathfinder against research data to ensure our tool can be trusted.

Pathfinder scales to the size and complexity of your project. Simple experiments can be setup in minutes. Pathfinder also pushes past the limits of other tools with Monte Carlo sensitivity analysis, smoke contaminant exposure, social distance modeling, and more.

Thunderhead Engineering supports you every step of the way. Whether you want in-depth training or self-taught materials, you can learn performance-based design modeling with greater efficiency and proficiency. We design our software for anyone to learn, and our customers are delighted when our support team helps them succeed.

We believe Pathfinder will quickly win you over. Try it free for 30 days - complete and unrestricted.

Trusted by experts around the world

Egress tool in SFPE survey
International Partners
Years of Updates
Trusted by experts around the world

PyroSim and Pathfinder allow our team to streamline our model builds, use unique techniques and approaches, and provide clean and concise output data. The software saves us time through many of the powerful features, which translates to both cost and time savings to our clients.

Thumbnail Image of David Stacy
David Stacy
Principal & Founder, Performance Based Fire Protection Engineering, PLLC


Build free for 30 days. Purchase per computer or per network seat. Save by combining multiple licenses.

Annual subscriptions start on the date of purchase and are valid for 365 days. Subscriptions can be renewed as needed in the future.


Pathfinder licensed for all users on a single computer.

$ 2350 /yr

Purchase Node-Locked

What's included

  • Pathfinder pedestrian movement and evacuation simulation.
  • Results visual analysis, management, and export.
  • One year of support and updates.


Pathfinder licensed for all computers and users on a network.

$ 3525 /yr

Purchase Floating

What's included

  • Everything in Pathfinder Node-Locked.
  • Share pool of licenses across multiple PCs.
  • Thunderhead License Manager server and support.

Discounted multi-licensing

Save 50% on all additional licenses across all products.

% 50 discount


What's included

  • Only pay full price for single most expensive license.
  • 50% discount applied to ALL additional licenses ordered.
  • Combine PyroSim and Pathfinder, Node-locked and Floating in your order.


Discounts and service for high volume licensing.


Contact Sales

What's included

  • 10 or more licenses to fit your needs.
  • Advanced support for your projects.
  • Early access beta releases.

Apply for free academic or government review licenses.

Educational licenses are available to students and instructors for academic, non-commercial use.

Review licenses are available to authorities (AHJs) for regulatory, non-commercial use.