isee systems provides technical support and maintenance to
customers who own version 9 and above of the iThink or STELLA software and who
own a current technical support plan.
Technical support is provided by telephone or e-mail and includes
software installation support, troubleshooting and general "how-to" questions.
Maintenance includes patches, updates, and minor software releases. In-depth
modeling support is available through our qualified consulting and training partners.
Before contacting technical support, browse the FAQs section.
- By Email
- By phone: (603) 448-4990
Toll Free: (800) 987-6758
Monday through Friday - 9:00am to 5:30pm Eastern Time (US and Canada)
- Holiday Schedule

For a quicker response to your support question, please
send an email with the following:
- software registration number
- a clear description of your question/problem
- steps to reproduce the problem
- an attached copy of your model
For more information, please review our policies.
To renew your annual support plan, click here.