Calyx Ratings

Calyx Global Inc. is a Delaware-registered carbon credit ratings company founded in 2021, with its principal place of business in Leadville, Colorado; co-founder Duncan van Bergen describes its purpose as giving the carbon market independent, science-backed voices on quality. It helps buyers, traders and investors judge whether credits, including nature-based ones, deliver the climate impact they claim.

Calyx Ratings assigns GHG integrity ratings on an AAA to D scale and SDG impact ratings from +1 to +5, alongside screens for social and environmental safeguards and carbon crediting programmes. Coverage exceeds 1,150 GHG ratings and 450 SDG ratings across more than 35 project types such as forestry, REDD+, cookstoves and rice. Calyx Compass and early-stage assessments give rating outlooks for pre-verification projects, and advisory services offer custom analysis. The company is funded by subscribers rather than project developers, and ratings are delivered via its platform and partners such as Bloomberg, Climate Impact X and AlliedOffsets.

• GHG ratings: AAA to D scores on whether credits deliver the claimed emission reductions or removals.
• SDG ratings: +1 to +5 scores for sustainable development contributions.
• Safeguards screening: flags social and environmental risks of projects.
• Programme screenings: gold, silver, bronze or fail ratings for carbon crediting programmes.
• Calyx Compass: integrity guidance and rating outlooks for early-stage and unrated projects.
• Distribution: ratings available on the Calyx platform, Bloomberg Terminal, Climate Impact X and AlliedOffsets.

A Vietnamese company buying offsets for net-zero claims can screen projects by GHG rating before purchase. A carbon project developer in Vietnam can use early-stage assessments to understand how buyers will judge its project and improve design. A bank or fund building a carbon portfolio can monitor rating changes across holdings.

Buyers can avoid low-integrity credits by checking a project's GHG rating and risk factors before purchase, reducing greenwashing exposure. Subscriber funding means ratings are not paid for by the developers being rated. Ratings appear directly in Bloomberg, Climate Impact X and other trading tools, so procurement and trading teams can compare projects in their existing workflow, and early-stage assessments let investors gauge risk before a project is verified.

After integrity controversies over forest and cookstove credits, corporate buyers and investors increasingly require independent ratings before buying credits. Vietnam is building a domestic carbon market and has many forest, rice and energy projects selling to international buyers, who use ratings to differentiate quality. Singapore's Climate Impact X already displays Calyx ratings for Asian buyers.

Founded in 2021; Calyx Global Inc., a Delaware corporation with principal place of business at 518 Harrison Ave, Leadville, Colorado. Co-founder Duncan van Bergen. Subscriber-funded model. Customers named include Microsoft, J.P. Morgan, Meta, Salesforce, Santander, Volkswagen and Shell. Ratings delivered on the Bloomberg Terminal since January 2026.