The choice depends on your internal skills and objective: SaaS software (Greenly, Sweep, Sami, Carbo, etc.) suits a competent internal lead, a standard service-sector activity and a need for ongoing monitoring. A consultancy is preferable for a first footprint, a complex activity (manufacturing, multiple sites, substantial scope 3) or an action plan engaging management. With a consultancy, allow €10,000 to €30,000 excluding VAT depending on complexity, or around €6,000 excluding VAT payable with Bpifrance and ADEME's Diag Décarbon'Action.
Read the source article: The 10 pitfalls of a first Bilan Carbone®