Summary Product carbon footprint (PCF) software calculates the greenhouse gas emissions of each product you sell, from raw materials to the factory gate or beyond, across a whole range at once. Five tests separate the options: the data a footprint starts from, the standards it follows, independent proof of method, data exchange over the PACT network, and who does the modelling. All seven platforms in this guide say they scale beyond one-off life cycle assessments (LCAs).