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About Us

Invoice America

Liss Technologies has a strong presence in the upper Midwest, with apartment owners, managers, and developers. Liss Technologies Group is a full-service product design, development, manufacturing and support organization, offering products to make the modern lifestyle effortless.

Invoice America and Compugas offer highly innovative products to help enrich the business of our clients by encouraging reduction in utility costs and promoting conservation. We strive to provide billing protocol that maintains superior performance and quality with a minimal amount of effort. This is achieved by incorporating the latest in advanced wireless technology with up to the minute internet capability.


Our systems provide an affordable solution to rising utility costs and offer rapid return on initial investment. Further, we take great pride in our commitment to providing stable and dependable monthly billing services for our customers. It is the commitment to quality and service that has laid the foundation for Invoice America to be successful and serve as the basis for continued success for the past 35 years and for many years into the future.


Over 40 years experience specializing in multifamily utility cost allocations.

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