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Aviation · head to head

AGI STK vs FltPlan Go

AGI STK logo

AGI STK

Aviation

Systems Tool Kit for space and aerospace analysis

From
Free
Rated
-
Full reviewWebsite
FltPlan Go logo

FltPlan Go

Aviation

Integrated flight planning and filing platform

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: 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; FltPlan Go no pricing published on website; pricing model not described
  • They diverge on capability: AGI STK covers Orbit analysis, FltPlan Go covers Flight planning.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which AGI STK and FltPlan Go actually diverge.

Attributes where AGI STK and FltPlan Go differ
AttributeAGI STKFltPlan Go
PlatformsWindows, LinuxWeb, Ios, Android
Founded19892002

Identical on both: starting price (Free), pricing model (subscription), free tier (Yes), user rating (Not yet rated), category (Aviation).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in AGI STK

  • Orbit analysis
  • 4D visualization
  • Mission planning
  • Communication analysis
  • Conjunction assessment
  • MATLAB
  • Python
  • C++/.NET API

Only in FltPlan Go

  • Flight planning
  • Route optimization
  • Flight filing
  • Real-time tracking
  • Weight and balance
  • ATC systems
  • Flight tracking
  • Weather services

Both cover

  • Data encryption

What people use each for

The jobs each tool is most often brought in to do.

AGI STK

  • Modelling satellite orbits, coverage and conjunction risknot FltPlan Go
  • Mission analysis and visualization for air, space and defence systemsnot FltPlan Go

FltPlan Go

  • Flight planningnot AGI STK
  • Flight filingnot AGI STK
  • Flight trackingnot AGI STK
  • Operations managementnot AGI STK

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

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

FltPlan Go

  • No pricing published on website; pricing model not described

Pricing, plan by plan

AGI STK

Free
  • STK FreeFree
    • Basic analysis
    • 2D/3D visualization
    • Orbit analysis
  • STK Professional$15000/year
    • Advanced analysis
    • Premium modules
    • API access
  • STK Enterprise$50000/year
    • All modules
    • Multi-user
    • Custom solutions

FltPlan Go

Free
  • FreeFree
    • Basic flight planning
    • Route optimization
    • Limited filing
  • Premium$49.99/month
    • Advanced planning
    • Unlimited filing
    • Real-time tracking

Which should you pick?

Choose AGI STK if

  • You need orbit analysis.
  • You want to start without paying.
  • You work on Windows, Linux.
  • You also want 4d visualization.
AGI STK review

Choose FltPlan Go if

  • You need flight planning.
  • You want to start without paying.
  • You work on Web, Ios, Android.
  • You also want route optimization.
FltPlan Go review

Questions people ask

Is AGI STK or FltPlan Go better?
Neither clearly leads. AGI STK starts at Free and FltPlan Go at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, AGI STK or FltPlan Go?
AGI STK starts at Free and FltPlan Go at Free.
Does AGI STK or FltPlan Go run on more platforms?
AGI STK runs on Windows, Linux. FltPlan Go runs on Web, Ios, Android.
Can I use AGI STK for free?
Both have a free tier, so you can try either at no cost before committing.
What is AGI STK best used for?
AGI STK is most often used for modelling satellite orbits, coverage and conjunction risk, mission analysis and visualization for air, space and defence systems. Of those, modelling satellite orbits, coverage and conjunction risk and mission analysis and visualization for air, space and defence systems are not what FltPlan Go is typically brought in for.
What can AGI STK do that FltPlan Go cannot?
AGI STK covers Orbit analysis, 4D visualization, Mission planning, Communication analysis. FltPlan Go covers Flight planning, Route optimization, Flight filing, Real-time tracking. Both handle Data encryption.

Answered from the vendors’ own pages

FltPlan Go: What is FltPlan's pricing?

FltPlan does not display pricing information on their website. The site describes FltPlan Go app, FltPlan Manager, and Garmin integrations, but provides no cost, subscription, or fee details. Pricing information must be obtained by contacting the company directly.

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