Best CDP accredited solutions providers for US companies: the four types, and which one you actually need

The short answer: CDP accredits four different kinds of provider, not one, and picking the wrong kind is the most common mistake US disclosers make. Consultancy providers supply methodology and writing help. Software providers supply the system your data lives in. Verification providers supply the independent third-party check that CDP's Leadership criteria actually require. Renewable energy providers supply the instruments behind your market-based Scope 2 claim. Work out which of those four is genuinely blocking you before you look at a single logo, because none of them substitutes for another.

One thing to be clear about up front, since a lot of vendor marketing implies otherwise: an accredited provider does not raise your score. CDP scores the response you file against its published criteria. It does not award points for who helped you file it.

What is a CDP accredited solutions provider?

CDP runs a partner program and publishes a directory of accredited providers, each listed with a tier, a provider type and a geography. A typical entry reads like the one for Sphera, which CDP lists as a silver software solutions provider in the United States offering sustainability strategy, TCFD-related services, science-based target setting, data collection and software services, greenhouse gas emissions inventory, life cycle assessment and Scope 3 services.

Accreditation is best understood as CDP confirming that a firm knows the questionnaire and the scoring methodology well enough to work in it. It is a competence signal and a directory listing. It is not an endorsement of results, and it carries no scoring weight.

The four provider types, and what each one actually solves

This is the table most buyers need and almost nobody prints. The four types appear side by side in CDP's own provider listings, and they map cleanly onto four different reasons a disclosure stalls.

Some firms hold more than one accreditation. NTT DATA, for example, has been recognized as a gold consultancy and software solutions provider. But most hold one, and the type on the listing tells you what you are actually buying.

Gold and silver: what CDP publishes, and what it does not

CDP labels providers gold or silver, and it does not publish a formal public rubric explaining the difference. What the directory itself shows is a consistent pattern: gold entries are listed with global coverage, while silver entries name a country or region. Salesforce, Benchmark Gensuite, Pulsora, GEP, Ecometrica and NTT DATA appear as global gold providers. Agendi appears as a silver consultancy provider in the US, Clark Nuber as a silver verification provider in the USA, Bullfrog Power as a silver renewable energy provider in Canada and the US.

Read that way, silver is a description of reach and specialism rather than a quality grade, and treating it as second-rate is a misreading that costs US companies good local options. If you are a single-country US filer, a silver provider accredited in the United States may well understand your situation better than a global firm will. Check the live directory before you shortlist, because tiers and listings change between disclosure cycles.

Why a provider cannot buy you a better score

CDP scores against 32 essential criteria, and the wall for most companies sits at the Leadership band rather than at Disclosure or Awareness. The binding constraint there is evidence, not eloquence. To score at Leadership on the verification criterion you need at least 95% of Scope 1 and at least 95% of Scope 2 verified, plus at least one Scope 3 category. For the A List the bar rises to 100% of Scope 1 and Scope 2 and at least 70% of reported Scope 3. In 2025, 899 companies made the A List out of roughly 20,000 disclosers, so about 5%.

No consultancy can write around a missing verification statement, and no software platform can supply one either, because independence is the point. This is exactly why the four types matter: a company that hires a consultancy when its real blocker is verification will spend the budget and still miss the band. The criteria are laid out on our CDP essential criteria page, the banding logic is in CDP scoring methodology 2026, and the verification thresholds are worked through in CDP verification requirements.

Which type you need, by what is actually blocking you

The dates that constrain any provider engagement

Timing decides whether hiring anyone is realistic. The 2026 scoring deadline is September 16. An on-demand extension is available in North America for US$2,500, moving the date to September 30, and it has to be requested by September 29. The final deadline for a response to be accepted at all falls in the week commencing October 26, and scores are released in the week commencing November 30. Those are CDP's own published figures and dates.

Two practical consequences. First, a verification engagement is not a last-week purchase. Assurance takes sampling, evidence requests and fieldwork, so if Leadership is the goal this cycle, the verification decision needed making months ago and the honest move now is to plan it for next cycle. Second, if you are inside the extension window, buying the extension is usually cheaper than filing a weak response, because the response is scored either way and a rushed one sets your public baseline. The fee structure itself, including the supply-chain-only exemption that means many suppliers pay nothing and are still scored, is on our CDP admin fee page, and the release-date question is covered in when are CDP scores released.

It is also worth mapping CDP against everything else landing this quarter before you commit budget to a provider. For a lot of US companies, September 16 is followed by the EPA greenhouse gas reporting date of October 30 and the first California SB 253 filing on November 10, all drawing on the same underlying inventory. Teams that handle this well tend to treat it as one obligations calendar with shared evidence rather than three separate projects, whether that means tracking the obligations and controls in one place or just a disciplined shared workbook. The overlap between the federal and California regimes is compared in EPA GHG reporting vs SB 253.

What to ask before you sign

• Which accreditation type do you hold, and is it current? Ask them to point you at their live directory entry rather than a logo on a slide.
• Which scoring band are we realistically reaching this cycle, and what is the binding constraint? A good provider will name the criterion, not promise a grade.
• Who owns the data after the engagement? If the inventory only exists inside a consultant's model, next year is a repeat purchase.
• Can every reported figure be traced back to a source document? This is the question a verifier will ask you, so ask it first.
• What happens to the Scope 3 categories you cannot cover? CDP scores a reasoned "not relevant" answer, so the handling matters.

If your blocker is data rather than expertise

Worth being honest about where a provider is the wrong purchase. A large share of stalled disclosures are not stalled on methodology at all. The team knows what the GHG Protocol says. What they do not have is a Scope 3 number they can defend, because purchased goods and services is several thousand accounts payable lines that nobody has classified, and the utility data is a folder of PDF bills.

That is a data problem, and consulting hours are an expensive way to solve it. Our classifier starts at that export: point it at the accounts payable, general ledger or utility file you already produce and it proposes a scope and a Scope 3 category for every line, with a confidence level and a stated reason, so a person reviews the uncertain tail instead of the whole file. Every figure keeps a link back to the invoice line behind it, which is the trail a verifier samples. If a provider is still the right call afterward, you will be hiring them for judgment rather than for data entry, which is a much better use of the budget. If your accountant is the one doing this work, the advisor-led route is a real alternative and the Sumday carbon accounting alternative page compares it honestly. The vendor landscape for the software side, including one firm that holds a CDP software accreditation, is covered on our Sphera carbon accounting alternatives page and on CDP reporting software.