What Calyx Global does

Calyx Global is an independent carbon credit ratings and market intelligence company serving enterprise buyers, financial institutions, and project developers in the voluntary carbon market. Founded in 2023 by Donna Lee and Duncan Van Bergen with Chief Scientist Dr. Deborah Lawrence, the firm produces expert-led ratings that assess the likelihood that carbon credit projects will deliver their claimed greenhouse gas emission reductions or removals, alongside supplementary SDG assessments. Its platform covers 30+ project types and includes the flagship Calyx Ratings product, Calyx Compass (a data-driven diligence tool for unrated and early-stage projects), Early-stage Assessments (pre-verification risk analysis), Expert Advisory Services, a Research Hub, and Carbon Indices; over 1,100 GHG ratings and 550+ SDG ratings have been published to date.

The company operates a subscription-based revenue model in which subscribers pay for access to ratings and intelligence, while the firm explicitly does not accept developer-paid ratings or transaction-based fees. This financial independence policy is core to its value proposition in a market where conflicts of interest have eroded buyer trust. Distribution is multi-channel: direct enterprise sales and self-serve platform access at app.calyxglobal.com are combined with embedded distribution through third-party carbon market platforms including Allied Offsets, ClearBlue Markets, Bloomberg, Emsurge, Climate Impact X, and Carbonplace. Marquee customers include Microsoft, J.P. Morgan, Meta, Salesforce, Volkswagen, Banco Santander, Duke University, and USC, and Calyx has been independently recognized by Carbon Market Watch as the most conservative and reliable rating agency among those assessed. Headquartered in Leadville, Delaware (USA), the company remains privately held with 1-10 employees and a single disclosed seed round led by Surge.

Name

Calyx Global

Legal name

Calyx Global Inc.

Website

https://calyxglobal.com

Company type

Private

Founded year

2023

Operating status

Operating

Headcount range

1–10 employees

Short description

Calyx Global is an independent carbon credit ratings agency that provides expert-led, science-backed ratings and market intelligence to enterprise buyers, financial institutions, and project developers in the voluntary carbon market, funded via subscriptions to preserve rating independence.

Ownership category

akta.pro rank

Product category

Carbon Credit Ratings and Market Intelligence

NAICS

Environmental Consulting Services (54162), Testing Laboratories and Services (54138)

SIC

Services-Testing Laboratories (8734)

akta.pro primary industry

Carbon Credit Ratings & Due Diligence (Quality Scoring, Integrity Assessments) (EUABADAF)

akta.pro secondary industries

Methodology Development & Standard-Setting Support (Protocols, Tools, Updates) (EUABACAN), ESG/Sustainability Reporting & Disclosure Platforms (EUABAEAB), Data Assurance, Audit & Attestation (ISAE 3000/3410, SOC, Chain-of-Custody) (EUABACAJ)

Keywords

• Carbon credit ratings
• Voluntary carbon market
• Carbon market intelligence
• Carbon due diligence
• ESG ratings

Headquarters

HQ city

Leadville

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Software

Cost components

Personnel, Technology or R&D, Marketing or Sales, Operations

Revenue model

1. Subscription-based ratings platform: Revenue comes from subscribers accessing the Calyx platform, ratings, and intelligence. The company explicitly states revenue comes from subscribers, not transaction volume or developer-paid ratings, which protects independence and prevents conflicts of interest.

Go-to-market motion3 records

Distribution channels3 records

Marketing channels5 records

Core offering

Calyx Global provides independent, expert-led carbon credit ratings and market intelligence to help businesses select higher-quality voluntary carbon credits. Its core offerings include Calyx Ratings (a tiered rating product assessing GHG integrity and safeguards across 30+ project types), Calyx Compass (a risk identification tool for early-stage and unrated projects), Early-stage Assessments (pre-verification project risk analysis), Carbon Indices (benchmark data), and Expert Advisory Services (custom consulting for corporate carbon strategy and due diligence).

Product overview

Calyx Global is an independent carbon credit ratings and market intelligence company offering a platform with multiple integrated products. The core offering is Calyx Ratings, which provides expert-led, science-backed ratings that assess the likelihood of carbon credit projects meeting their GHG emission reduction or removal claims. This core product is supplemented by Calyx Compass (a data-driven risk identification tool for early-stage projects), Early-stage Assessments (project risk analysis and rating outlook for pre-verification projects), Expert Advisory Services (personalized consulting), and a Research Hub providing market intelligence and indices. The company operates on a subscription-based model where revenue comes from subscribers rather than developer-paid ratings or transaction volume, ensuring independence in ratings. Calyx Global has conducted over 1,100 GHG ratings across 550+ SDG ratings and 30+ project types.

Differentiator

Problem solved

Functional benefit

Products and services

• Calyx Ratings

Quantifiable outcome

• Credits rated in highest integrity tiers trade at prices nearly 50% higher than lowest tier credits
• +1 more outcomes

Named customers11 records

Segments2 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

Ten partnerships are on record, tiered core and minor.

• ClearBlue MarketscoreStrategic or Co-development Partner · 19 January 2026Joint report partnership to analyze the voluntary carbon market. The joint report found measurable progress in pricing transparency in 2025, with price differentiation between high- and low-quality carbon credits widening sharply as buyers became more selective.
• ClimateSeedminorStrategic or Co-development PartnerPanel discussion at Produrable 2025 discussing convergence of voluntary and regulatory carbon markets, highlighting national initiatives such as France's Label Bas Carbone, UK's Woodland Carbon Code, and EU's Carbon Removal and Carbon Farming framework.
• The Shared Wood CompanyminorStrategic or Co-development PartnerPanel discussion at Produrable 2025 on carbon market convergence alongside ClimateSeed and Calyx Global.
• Forest TrendscoreStrategic or Co-development PartnerForest Trends experts co-founded a practitioner-led forum with Calyx Global and GreenCollar to discuss integrity issues in the nature-based carbon market, including topics such as exaggerated emission reductions, questionable additionality, and stakeholder impacts.
• GreenCollarcoreStrategic or Co-development PartnerGreenCollar experts co-founded a practitioner-led forum with Calyx Global and Forest Trends to discuss integrity issues in the nature-based carbon market.
• Allied OffsetsminorChannel Partner/ Reseller/ DistributorThird-party platform where Calyx ratings are made available, enabling broader distribution of ratings to carbon market participants.
• BloombergminorChannel Partner/ Reseller/ DistributorThird-party platform where Calyx ratings are made available, providing visibility to Bloomberg terminal users.
• Climate Impact X (CIX)minorChannel Partner/ Reseller/ DistributorThird-party platform where Calyx ratings are made available for carbon credit marketplace participants.
• CarbonplaceminorChannel Partner/ Reseller/ DistributorThird-party platform where Calyx ratings are made available for carbon credit marketplace transactions.
• EmsurgeminorChannel Partner/ Reseller/ DistributorThird-party platform where Calyx ratings are made available.

Scale indicators4 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Sylvera: Sylvera is a direct competitor offering independent carbon credit ratings and ratings-driven market intelligence for the voluntary carbon market, serving enterprise buyers and project developers with overlapping methodology rigor and product packaging.
• BeZero: BeZero is a direct competitor providing carbon credit ratings, risk analytics, and market intelligence, targeting the same enterprise buyer and developer customer base with comparable subscription and advisory offerings.

Broad incumbents

• MSCI Carbon Project Ratings: MSCI is a broad incumbent expanding into carbon credit ratings and climate analytics, leveraging deep enterprise ESG data relationships to offer ratings alongside broader sustainability products — overlapping with Calyx's enterprise buyers if not its specialist positioning.
• Moody's (Carbon and Climate Solutions): Moody's is a broad incumbent offering carbon market analytics and climate transition data to enterprise customers, overlapping with Calyx's buyer base while competing from a much wider portfolio of credit and ESG products.

Emerging players

• Renoster: Renoster is an emerging analytics player in carbon credit quality assessment and project data, focused on data-driven evaluation with partial overlap to Calyx's Compass and ratings products.

Others

• Verra: Verra operates the VCS registry and sets methodologies for voluntary carbon credits; it is an ecosystem participant rather than a direct competitor but its methodology choices directly drive Calyx's product roadmap and re-rating workload.
• Allied Offsets: Allied Offsets is a carbon market data provider and distribution partner where Calyx ratings are surfaced; it is adjacent infrastructure rather than a competitor, but serves the same buyer workflow with complementary market intelligence.
• ClearBlue Markets: ClearBlue Markets is a carbon credit pricing analytics and marketplace firm that co-publishes research with Calyx; it is an ecosystem partner providing complementary price data, not a direct ratings competitor.
• South Pole: South Pole is a carbon project developer and advisory firm that also operates analytics tools for buyers; it overlaps with Calyx's advisory service line and serves similar enterprise customers but from a developer-side perspective.
• Carbonplace: Carbonplace is a carbon credit marketplace and infrastructure provider that distributes Calyx ratings; it is an ecosystem channel rather than a ratings competitor, but addresses the same buyer journey.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat6 records

Key risks5 records

Key highlights7 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Funding overview

Funding rounds1 record

Investors1 record

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Calyx Global