Softwr
AGI STK logo

AGI STK

Systems Tool Kit for space and aerospace analysis

As of 30 August 2026, AGI STK is free to use. AGI Systems Tool Kit (STK) is the leading commercial software for modeling, simulation, and analysis of complex systems in space, defense, and intelligence. Softwr lists it under Aviation. AGI STK is made by Ansys (formerly AGI), launched in 1989, available on Windows, Linux.

Visit site

Overview

What AGI STK does

AGI Systems Tool Kit (STK) is the leading commercial software for modeling, simulation, and analysis of complex systems in space, defense, and intelligence. It provides 4D visualization, precise orbit determination, communication analysis, and mission planning capabilities used by space agencies, defense organizations, and commercial satellite operators worldwide.

What people use it for

  • Modelling satellite orbits, coverage and conjunction risk
  • Mission analysis and visualization for air, space and defence systems

Related searches

The honest half

Where it falls short

Concrete and checkable, so you can decide whether any of them matter to you. This is the half of a review a vendor will not write about AGI STK.

  • STK is sold as a ladder of separate licences, STK Pro, STK Premium Air, STK Premium Space and STK Enterprise, so mission areas are gated behind different products
  • Further capability is sold as separate add-on toolkits including TETK, the RF Channel Modeler and the STK Missile Toolkit
  • Distributing an application built on STK Engine to end users requires each of them to hold an Ansys STK Engine Runtime License
  • Free access is limited to students at accredited institutions and to time-limited trials
  • No price, minimum or cost driver is published for any STK tier

Cross-shopped

What people choose instead of AGI STK

Each pairing was judged by two reviewers asking whether a buyer would genuinely weigh the two against each other. The ones that failed were deleted rather than published.

Pricing

What AGI STK costs

Taken from the vendor's own pricing page. Prices move, so check before you buy.

STK Free

Free

  • Basic analysis
  • 2D/3D visualization
  • Orbit analysis
  • Educational use

STK Professional

$15,000 /yr

  • Advanced analysis
  • Premium modules
  • API access
  • Commercial use

STK Enterprise

$50,000 /yr

  • All modules
  • Multi-user
  • Custom solutions
  • Premium support

Capabilities

Features

  • Orbit analysis

  • 4D visualization

  • Mission planning

  • Communication analysis

  • Conjunction assessment

  • MATLAB

    Integration with MATLAB

  • Python

    Integration with Python

  • C++/.NET API

    Integration with C++/.NET API

  • Flight dynamics systems

    Integration with Flight dynamics systems

  • GIS platforms

    Integration with GIS platforms

  • Government certified

    Government certified security feature

  • Data encryption

    Data encryption security feature

Behind it

Who makes AGI STK

Company
Ansys (formerly AGI)
Based in
Exton, PA
Share

Keep looking

Where to go from AGI STK

Best Aviation software for

Compare AGI STK with

Other Aviation software

Softwr does not host reviews and shows no star rating for AGI STK, because a rating we did not collect is not ours to publish. What is here is the pricing and platform detail from the vendor’s own pages, limitations we could state concretely, and alternatives a reviewer confirmed people weigh against it. Tell us if any of it is wrong.

More on AGI STK

Best Aviation software alternatives

Flighty logo

Flighty

Subscription flight tracking for iOS with predictive delay alerts

Per user per month or one-time purchase
Boeing Aviator logo

Boeing Aviator

Boeing flight planning and pilot information system

subscription
A

ARINC Direct

Real-time flight operations and dispatch platform

AMOS logo

AMOS

Aviation maintenance and engineering management software

subscription
Amadeus Altea logo

Amadeus Altea

Complete airline passenger service and reservation system

usage-based
View all Aviation software

Compare AGI STK with alternatives