Independent assurance
Verification backed by ISO accreditation and internationally recognized methodologies, helping organizations and project developers build confidence in climate data and claims.
Accredited Validation & Verification Body
Independent verification for carbon credits that hold up.
Sustainext is an ANAB-accredited Validation and Verification Body under ISO 14065. We audit carbon projects against leading standards and issue opinions your registry, your buyers, and your regulators can rely on.
ANAB-accredited · ISO 14065 · Independent from every registry we audit against
Verification record
- 01Pre-engagement
- 02Engagement
- 03Planning
- 04Verification execution
- 05Independent review
- 06Decision & issuance
- 07Post-issuance monitoring
Why trust Sustainext
Built on three pillars
Independence, expertise, and technology — none of the three works on its own.
Climate expertise
A growing team of auditors and climate specialists with backgrounds across project types, commodities, sectors, and geographies.
Digitally-enabled
A digital platform that streamlines collaboration, evidence management, and audit workflows — improving transparency while reducing administrative effort.
Four accredited disciplines
One independent standard, applied across four disciplines.
Each discipline is its own accredited scope of work — not a marketing label stretched over one audit method.
ANAB · ISO 14065
Carbon VVB
Accredited validation and verification for carbon credit projects, across removal and reduction methodologies and every major registry. This is our core discipline — assessing a project's design and delivered performance against the standard it's registered under, from design through issuance.
Covers
- Project design validation
- Delivered performance verification
- Registry-aligned issuance support
ISAE 3000 · AA1000-aligned
ESG Assurance
Independent assurance over ESG disclosures, sustainability reports, and the non-financial metrics investors and regulators rely on. This discipline checks a company's own reported claims — not a tradable credit — against recognized assurance standards.
Covers
- Sustainability report assurance
- Non-financial metric verification
- Disclosure-readiness review
ISO 14064 · 14040/44 · 14065
ISO Verification
Verification against core ISO environmental standards, from GHG quantification to life cycle assessment methodology. This discipline covers product carbon footprints and LCA critical reviews — work that's methodology-driven rather than registry-driven.
Covers
- Product carbon footprint verification
- LCA critical review
- Methodology compliance checks
ISO 14064-3
GHG Verification
Third-party verification of GHG inventories and emissions claims, at the entity, facility, or individual project level. This is the discipline behind corporate inventory verification, Scope 3 value-chain claims, and emission factor checks.
Covers
- Corporate GHG inventory verification
- Scope 3 value-chain claims
- Emission factor verification
Who we verify for
Solutions by project type
Verification scoped to how your project actually works, not a generic checklist.
Renewable energy projects
Validation and verification for solar, wind, and other renewable generation and avoidance projects.
Bio carbon & nature-based projects
Verified sequestration and removal claims across afforestation, soil carbon, and blue carbon projects.
Article 6.2 / 6.4 projects
Independent assessment against Paris Agreement cooperative approaches and the crediting mechanism.
Insetting & interventions
Verification for value-chain interventions and insetting claims that don't depend on external offset markets.
Corporate GHG inventory & value chain
Assurance on Scope 1, 2, and 3 inventories, from a single facility to a full value chain.
What we do
Services
One core discipline, applied across every stage of the carbon accounting lifecycle.
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01
Validation & verification
Our core VVB service — independent assessment against your chosen standard, from design through issuance.
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02
GHG inventory verification
Third-party assurance over corporate Scope 1, 2, and 3 emissions inventories.
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03
Product carbon footprint verification
Independent checks on product- and SKU-level footprint claims.
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04
LCA critical reviews
Peer review of life cycle assessments against ISO 14040/14044.
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05
Emission factor verification
Assessment of the emission factors underlying your inventory or project claims.
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06
Impact modelling assessment
Review of the models and assumptions behind projected environmental outcomes.
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07
Carbon management advisory
Guidance on measurement and reporting systems ahead of formal verification.
The verification record
Built on a digital platform, not spreadsheets.
Every validation and verification runs through one secure, collaborative workspace — for project developers and auditors alike.
- Lower administrative burden
- Increased accuracy and transparency
- Real-time updates on project progress
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01
Pre-engagement of activities
Inquiry, application, and contract review.
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02
Engagement
Entering into contract and team nomination.
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03
Planning
Audit planning.
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04
Validation / verification execution
Review of documents and onsite visits or remote audit.
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05
Review process
Independent review for internal quality control.
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06
Decision & issuance
Issuance of the validation / verification opinion.
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07
Post-issuance monitoring
Facts discovered after the issuance of the opinion.
Resources
Standards, registries, and how we work
Accreditation status
ANAB-accredited Validation and Verification Body, ISO 14065.
Methodologies & standards supported
Coverage across leading carbon standards and sectoral methodologies.
Registries integrated with
Direct integration with major carbon registries through our platform.
Case studies & insights
Verification outcomes and field notes from our auditor network.
Independence
Structurally independent, by design.
Sustainext is not affiliated with the registries, developers, or rating bodies whose projects we verify. Our only obligation is to the accuracy of our opinion — backed by a global network of auditors across project types, geographies, and sectoral scopes.
Meet the team & our governance ↓Ready to get verified?
Tell us about your project and we'll scope the right verification pathway.
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