CircularTool is an instrument developed by Matrec and validated by Bureau Veritas to help companies measure the circularity of their products. The tool supports designers in the product design phase as it evaluates the choice of sustainable materials and helps them apply the Circular Economy EU Action Plan strategies and the Ecodesign Directive.

For the search for new circular material solutions to be applied to projects, CircularTool allows access to the Matrec observatory archive to select new circular materials. In addition, companies can create their own databases where they can add materials and components to be used in projects. The analysis methodology follows an input–output approach presenting quantitative results.

Circularity is measured through Key Performance Indicators (KPIs) identifying the environmental aspects of the materials used (recycled content, from reuse, from by-products, from renewable sources, etc.) and also consider disassemblability, reparability and different end-of-life scenarios.

CircularTool includes a certification process of the product's circularity, as it refers to the technical specifications developed by Matrec. It generates a circularity report that can also be used for communication.