SystemStar does Systems Engineering Estimation

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Costar does software estimating!

COCOMO Overview | Costar Overview | COCOMO II | Incremental COCOMO

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 Download Costar 7.0 demo

What's new in Costar 7.0

  FREE 2 day training course now bundled with Corporate License  

 Download the free Calico 7.0 calibration tool 

To learn about Costar before you download it, check out the Costar Guided Tour.


Introduction to Costar

COCOMO is the world's most widely used software estimation model.

Costar is a software estimation tool based on the Constructive Cost Model (COCOMO) described by Barry Boehm in his books Software Engineering Economics and Software Cost Estimation with COCOMO II.

Software project managers use Costar to produce estimates of a project's duration, staffing levels, effort, and cost. Costar  lets you make trade-offs and experiment with "what-if" analyses to arrive at the optimal project plan.

COCOMO has continued to evolve and improve since its introduction. Read a brief history of COCOMO for a summary.

Costar supports the traditional COCOMO, and the most recent models:

Click here for an Overview of COCOMO.


Quick Facts


You May Already be a Winner

You may be entitled to a free copy of Costar.

More than 1 million people are licensed to use Costar!

Many of the world's most advanced software development organizations have purchased Worldwide Corporate Licenses for Costar. Click here to see a list of Corporate Licensees.  If you work for a company that has a Corporate License Agreement with us, we'll tell you how to get your free copy.

Just call, write, fax, or email us to see if your company is already licensed to use Costar. You'll get your answer fast.


Get a Free Demo of Costar

Download a demo of Costar 7.0 for Windows


How to Contact Us:

Voice:(603) 672-0987
Fax:(603) 672-3460
Email:sales@SoftstarSystems.com
support@SoftstarSystems.com
Mail:P.O. Box 1360, Amherst, NH 03031

Softstar Systems was founded in 1985 to develop and market the best and most economical software estimation tools.

We offer free, unlimited, technical support.


Softstar Systems is not related to these corporations:

SoftStar Consulting Inc. is a company that does Project Development & Contract Programming in the Midwest.

Softstar Research Inc. is an Oregon company specializing in Object Oriented, Fixed Time, Fixed Price Projects.


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SystemStar®, Costar™, Calico™, and DBedit™ are trademarks of Softstar Systems.