Viscosity is free to use for the first 30 days. After this period it is necessary to purchase a license to continue using Viscosity.

A license for Viscosity can be purchased using a variety of payment methods from our online store. An email will be sent after purchase containing license information that can be entered into Viscosity to fully activate it.

Significant discounts are also available for site/volume and educational purchases. Please see the Available Discounts article for more information.

Sadly, we can't accept purchase orders or fill in new vendor forms for orders below 20 licenses. For orders of 20 or more licenses purchase orders can be sent to our Sales email address listed on our Support page.