(Click the green links for their websites)
Regardless of who is rating you, these courses will provide the guidance to be among the best at the lowest possible cost.
Examples of Rating Agencies are:
Carbon Disclosure Project (CDP). They are focused on enterprise-level companies. Only paid services for both the customer and suppliers
EcoVadis Covers enterprise, medium and SME's. Charges the customer and supply chain.
Fitch. They concentrate on large, normally publically listed companies. The client base is mainly investors. Only paid services are offered
S & P Standard & Poors are the world's largest rating agency. Similar offering to Fitch.
STERA Launched at COP26, it is the first independent environmental rating agency i.e. there are no charges for either the customer or the supply chain. They are the only rating agency to fully rate the extended supply chain. Ratings are focused on the status of companies today rather than future promises, so expect to see harsher views of many organisations. They have an "add on" automated scope three measurement solution (paid for service)
Sustainalytics Offers a wide-ranging set of services to banks, institutional investors but also has a corporate supply chain programme. All services are paid for.