Two ratings, two different audiences
Sustainability teams often ask whether CDP and EcoVadis are alternatives. They are not. They are two different rating systems with different audiences, scoring methodologies, and topic coverage. Most large companies eventually need both, because their customers and investors use them for different purposes.
CDP is primarily an environmental disclosure system used by investors, large customers, and regulators. It scores how completely a company manages and reports its emissions, water, and forests data. EcoVadis is a supplier sustainability rating used by procurement teams to qualify and monitor suppliers across environment, labor, ethics, and procurement practices. The two overlap in roughly 20 to 30 percent of underlying evidence but ask for it in very different formats.
This article maps the differences, the overlap, and how to align both with one underlying data discipline.
The basic distinction
CDP runs an annual structured questionnaire scored from D minus to A. The output is a public score and benchmark visible on the CDP website, used by investors and large customers as a measure of environmental disclosure quality. The scope is environmental: Climate Change, Water Security, and Forests, with plastics and broader nature topics emerging.
EcoVadis runs an assessment based on uploaded documents, reviewed by analysts. The output is a scorecard from 0 to 100 mapped to medal tiers (Bronze, Silver, Gold, Platinum) and shared with the buyers in the EcoVadis network. The scope is broader than CDP: Environment is one of four themes, alongside Labor and Human Rights, Ethics, and Sustainable Procurement.
Other practical differences:
- Frequency: CDP is annual and public, with a fixed April to June window. EcoVadis assessments are valid 12 to 24 months and can be initiated at any time of year.
- Audience: CDP scores are public and machine readable, used by investor coalitions managing trillions in assets. EcoVadis scores are mostly visible to the buyers in the network, used by procurement teams in supplier qualification.
- Methodology: CDP scoring is based on questionnaire responses and verifiable data points. EcoVadis scoring is based on uploaded policy, action, and reporting documents reviewed by analysts.
- Cost: CDP charges a response fee that depends on company size, often free for smaller suppliers. EcoVadis charges an annual subscription that scales with company size and assessment depth.
Where the underlying evidence overlaps
Despite different formats, the same documents and data points feed both ratings.
Environmental management system
CDP rewards ISO 14001 certification in scoring. EcoVadis rewards it heavily in the Environment theme. The certification, audit reports, and management system documentation feed both.
Emissions inventory
CDP requires a structured inventory across Scope 1, 2, and 3 with documented methodology. EcoVadis rewards quantitative emissions KPIs and reduction targets in the Environment theme. The same inventory feeds both, with CDP requiring the deeper category breakdown.
Water and energy data
CDP Water Security covers withdrawal, consumption, discharge, and basin level risk. EcoVadis rewards quantitative water and energy KPIs in the Environment theme. The same operational data feeds both.
Public disclosure under recognised frameworks
EcoVadis explicitly rewards public reporting under GRI, TCFD, CSRD, and CDP. A strong CDP response is itself one of the items that increases EcoVadis Environment scoring.
Verification and assurance
CDP rewards third party verification. EcoVadis rewards verified KPIs over self reported ones. The same verification statement feeds both.
Where they diverge
Several requirements are framework specific.
EcoVadis goes broader than environment
The Labor and Human Rights, Ethics, and Sustainable Procurement themes have no CDP equivalent. EcoVadis assesses topics like grievance mechanisms, anti corruption training, supplier code of conduct, and discrimination policies that CDP does not score.
CDP goes deeper into environmental scoring
CDP asks for emissions inventory at GHG Protocol category granularity, scenario analysis under specific climate scenarios, supplier engagement programmes with quantitative outcomes, and transition plan capex alignment. EcoVadis asks for evidence at a higher level: that the company has these things, not the underlying numerical detail.
Format
CDP is a structured questionnaire entered through the platform. EcoVadis is a document upload assessment. The same underlying evidence has to be packaged differently for each.
Output visibility
CDP scores are public. EcoVadis scores are visible mostly to the buyers in the network. A strong CDP score is a public branding asset; a strong EcoVadis score is a procurement gating asset.
How to align them in practice
Companies that score well in both follow a common discipline.
1. One environmental data layer. Emissions, water, energy, and waste data ingested from operational systems and structured in GHG Protocol categories. The same data feeds CDP, EcoVadis, CSRD, and SBTi.
2. One management system documentation set. ISO 14001 certification, environmental policy, training records, incident reports, audit programmes documented once and reused.
3. One supplier engagement programme. Supplier code of conduct, audit programme, training records, percentage of strategic suppliers signed up. CDP rewards the quantitative outcomes; EcoVadis rewards the documented programme.
4. One verification programme. Third party assurance over emissions and material KPIs feeds both ratings.
5. One public reporting strategy. CDP response, CSRD sustainability statement, voluntary reports referencing GRI or TCFD. EcoVadis analysts will find these and credit them in scoring.
The companies that build this once and reuse it across both ratings spend roughly 60 percent less time per cycle than companies running parallel preparation streams.
Common mistakes when running both
Patterns we see in the field:
- Treating EcoVadis only as a procurement task and CDP only as a sustainability task. The two teams diverge and end up with inconsistent numbers.
- Maintaining EcoVadis evidence in a parallel folder structure. The same documents already feed CDP, but they live separately and get out of sync.
- Skipping CDP because EcoVadis is enough for current customer requests. Customer expectations evolve. CDP requests typically follow EcoVadis requests within two to three years.
- Skipping EcoVadis because CDP is enough. EcoVadis is procurement gating in industries where CDP alone does not satisfy the buyer review process.
Sequencing for a company starting both
If your company is starting both ratings:
Year 1: complete the first EcoVadis assessment (if a customer is requesting it) and submit the first CDP Climate Change response. Both are likely to score in low to mid bands. Use them as foundation.
Year 2: improve both based on first cycle feedback. Add ISO 14001 certification, third party verification of emissions, and supplier engagement programme. Both ratings will reward this.
Year 3: validate SBTi targets, add reasonable assurance over Scope 1 and 2, and publish a comprehensive transition plan. Aim for Silver or Gold in EcoVadis and B band in CDP.
The compounding nature of both ratings rewards stable progression. Trying to leap from Bronze to Gold or from C to A in a single cycle rarely works.
Where Dcycle fits
The same canonical data layer that produces a strong CDP response also produces the structured environmental evidence EcoVadis analysts expect. Dcycle integrates with both, surfaces gaps before submission, and links each KPI and document to its primary source. Companies typically reduce parallel preparation effort by 60 percent and produce consistent, verifiable evidence across both ratings.
To see how this would apply to your reporting calendar, request a demo. For broader context, see the scoring methodology guide and the EcoVadis improvement guide for the EcoVadis specific angle.
Final thought
CDP and EcoVadis are not in competition. They are complementary tools that increasingly both gate access to capital and procurement. The companies that approach them as one underlying data discipline, two different rendering formats, are the ones whose scores will rise together over the next few cycles. The discipline that wins one wins the other.