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Supplier sustainability scores based on evidence

Built on over 35 years of supplier assessment expertise, the Achilles Sustainability Score turns validated supplier evidence into a transparent score and rating, showing where performance is strong, where action is needed and how results change over time.

From complex supplier data to clean, comparable insight

For buying organisations and hiring clients

  • Compare suppliers on a consistent basis.
  • See where performance or evidence requires follow-up.
  • Track changes and improvement over time.
  • Focus deeper assurance where it is most relevant.
Explore buyer benefits

For suppliers and contractors

  • Understand what is driving the score.
  • Identify missing or expired evidence and areas for improvement.
  • Show customers where strong practices are in place.
  • Take clear steps to improve performance.
Explore supplier benefits
Web-page-top-banner thumbnail of Achilles Global Supplier Risk and Sustainability Survey 2026

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years of supplier assessment expertise

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suppliers in the historical dataset used to develop the methodology

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scored pillars (ESG and Financial), plus H&S risk view

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0-100 score with a clear 1-5 star rating

A methodology designed for trust

The Achilles Sustainability Score shows what is driving supplier performance and where action is needed. Pillar-level scorecards help buyers focus due diligence and suppliers understand where to improve. Six principles ensure the methodology remains reliable, relevant and transparent.

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Evidence-backed

Built on validated supplier responses, supporting documents and third-party financial data.

Relevant to your network

The score reflects the assessment requirements and data framework of the Achilles networks your organisation subscribes to.

Designed for better decisions

Separate ESG and financial scores, plus a dedicated Health & Safety risk view.

Transparent

See strengths, weaknesses, score drivers and performance against the network average.

Kept current

Scores update with supplier data, while missing or expired evidence affects results.

Continuously refined

Developed using data from 50,000+ suppliers and regularly reviewed by industry experts and network partners.

Turn the score into supplier improvement

The value of the score is not limited to comparison. By identifying specific weaknesses and evidence gaps, the scorecard gives buyers and suppliers a practical starting point for improvement.

Address weaknesses

Suppliers can see which practices or evidence gaps are affecting their score and update the relevant information.

Keep evidence current

Expiry alerts help suppliers replace documents before they become outdated.

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Tailor assurance

Buyers can request more detailed information, additional validation or deeper assessment for suppliers requiring closer review.

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Track corrective action

Where an Achilles audit identifies a non-conformance, relevant workflows can support corrective action planning and progress tracking.

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How the Achilles Sustainability Score fits into wider supplier assurance

The Achilles Sustainability Score provides an evidence-based view of assessed supplier performance. It complements the assurance activities that may be appropriate for a supplier’s risk and criticality.

Achilles Sustainability Score FAQ

Q: What is the Achilles Sustainability Score?

It is a 0-100 supplier score based on validated supplier evidence and third-party financial data. It summarises performance across environmental, social, governance and financial pillars and is accompanied by a 1-5 star rating.

Q: How often is the score updated?

The score is recalculated when the supplier’s underlying data is updated. Missing or expired evidence can affect the result.

Q: What is the difference between the score and the rating?

The score provides the precise numeric result from 0 to 100. The rating translates the same result into a 1-5 star performance band, making it easier to recognise and communicate.

Q: How often is the score updated? 

The score is recalculated when the supplier’s underlying data is updated. Missing or expired evidence can affect the result.

Q: Does a high score remove the need for due diligence?

No. The score supports comparison and prioritisation, but it should be considered alongside the supplier’s context, criticality and any additional due diligence or audit activity required.

Q: Can suppliers improve their score?

Yes. The scorecard identifies weaknesses and evidence gaps. When a supplier improves its practices or provides updated evidence, the score is recalculated to reflect the new information.

See the Achilles Sustainability Score in action

Explore the evidence behind supplier scores, understand what is driving performance and see where further assurance or improvement may be needed.