Small World Consulting
Carbon accounting with a Scope 3 and supply-chain specialism, from the team led by Mike Berners-Lee.
Why we listed themListed for the Scope 3 specialism.
View profile →Carbon accounting & inventory
Consultants who build and maintain a corporate greenhouse-gas inventory across Scopes 1, 2 and 3, from a first footprint through to the annual reporting cycle.
Curated · chosen by us, not paid for
KERAMIDA
US engineering and sustainability firm building GHG Protocol inventories across Scopes 1, 2 and 3, with SBTi target and disclosure support.
Why we listed themListed as a US full-stack option: inventory, verification and LCA under one roof, with every claimed standard named on their own pages rather than described as proprietary method.
GHG Protocol Corporate StandardISO 14064-3 Validation and Verification of GHG StatementsISO 14040 / ISO 14044 Life Cycle AssessmentSBTi Corporate Net-Zero Standard
View profile →Anthesis Group
Sustainability consultancy covering corporate carbon reporting, SBTi targets and EU disclosure regimes.
Why we listed themListed as the large-firm option.
View profile →Pangolin Associates
Australian carbon accounting consultancy working to the GHG Protocol, ISO 14064-1 and the NGER scheme.
Why we listed themListed as the Australian option.
View profile →Attain Zero
Specialist net-zero consultancy measuring Scope 1, 2 and 3 footprints for UK businesses.
Why we listed themListed because they state the basis of their figures on their own site: the GHG Protocol and the UK Government conversion factors.
View profile →The Carbon Trust
Long-standing net-zero advisory working with businesses, governments and financial institutions.
Why we listed themListed as the established option.
View profile →These listings rotate daily, so nobody holds the top spot. Paying would add a listing to a separate sponsored section above this one — it never buys a position inside the curated list, and it never changes who appears in it.
Before you appoint one
- Which factor set, and which year of it? DEFRA 2026 is not DEFRA 2025, and the UK grid factor moved between them.
- Do you get the audit trail behind the number, or only the total?
- Which of the fifteen Scope 3 categories are excluded, and does the report say so on its face?
We do not verify these answers for you — we check that a provider states them publicly before we list it. The rest is yours to ask.
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Forwarded to jeremiah@greencalculus.com and discarded — no list, no marketing. Shortlists are pointers, not endorsements: the same checks in “how we chose them” apply, and the appointment is yours to make.
Other categories
Calculators for this work
Restaurant & Hospitality Carbon Footprint CalculatorScope 1 + 2 CHP / Cogeneration CalculatorScope 1 Aluminium Smelting PFC CalculatorScope 1 Biomass & Biofuel CalculatorScope 1 Cement & Lime Process CalculatorScope 1 Chemicals Process Emissions Calculator (Nitric / Adipic / Methanol / Ethylene / Ethylene Oxide / Carbon Black
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