Gold Standard & Other Registries
While Verra's VCS Program dominates the voluntary carbon market by volume, it operates within a broader ecosystem of crediting programs, each with its own emphasis, governance model, and market niche. Understanding the landscape of registries gives buyers and developers a clearer sense of which program is appropriate for a given project and claim type, and helps contextualise the integrity debates shaping the market's evolution.
Gold Standard for the Global Goals (GS4GG)
Gold Standard was established in 2003 by WWF and a coalition of NGOs precisely because they felt the CDM's standards were insufficient. From its inception, it positioned itself as the premium alternative: more demanding on sustainable development co-benefits, more rigorous on community consultation, and more selective on eligible project types. The current standard, Gold Standard for the Global Goals (GS4GG), launched in 2017, explicitly aligns its impact framework with the UN Sustainable Development Goals (SDGs).
Key distinguishing features of Gold Standard include:
- Mandatory co-benefit requirements: Every GS4GG project must contribute to at least three SDGs, one of which must be SDG 13 (Climate Action). Co-benefits must be measured, reported, and verified, not simply asserted. This is a significantly higher bar than VCS, which allows projects to certify co-benefits separately through CCB Standards but does not require them.
- Mandatory stakeholder consultation: Projects must conduct a formal, documented community consultation before design certification and maintain ongoing engagement. The Stakeholder Consultation and Engagement Requirements (document 102) set out specific procedural obligations.
- Safeguarding Principles: The Safeguarding Principles and Requirements (document 103) address risks including harm to ecosystems, impacts on vulnerable groups, and land rights conflicts. Projects must assess and document compliance with these principles at each certification stage.
- Gender equality requirements: All GS4GG projects must implement gender-sensitive procedures under document 104, with optional gender-responsive guidelines for projects seeking to quantify gender equality impacts.
Gold Standard issues Gold Standard Verified Emission Reductions (GSVERs). As of 2024, Gold Standard has certified over 2,000 projects in approximately 100 countries. It is headquartered in Geneva, Switzerland, at International Environment House II.
Gold Standard's Paris Agreement Alignment
Gold Standard's Requirements for Paris Agreement Alignment (document 119, effective January 2025) mandates that all GSVERs with a vintage of 1 January 2026 and onwards must be quantified using Paris Agreement-aligned methodologies. This means accounting for host country NDC ambitions and, where applicable, ensuring corresponding adjustments are arranged, positioning Gold Standard at the forefront of Article 6 alignment.
American Carbon Registry (ACR)
The American Carbon Registry, established in 1996 (making it the oldest carbon offset program in the world), is operated by Winrock International. It operates primarily in North America and accepts projects across forest carbon, agriculture, mine methane, ozone-depleting substances destruction, and several other sectors. ACR protocols are used in the California-Quebec cap-and-trade system for a subset of offset project types, giving ACR a direct compliance market linkage that few voluntary programs share.
ACR issues Emission Reduction Tonnes (ERTs). Its standards are generally considered robust, and its governance aligns closely with U.S. regulatory norms, which can be advantageous for North American buyers.
Climate Action Reserve (CAR)
The Climate Action Reserve, established in 2001 in California, focuses on North American projects including forests, livestock, ozone-depleting substances, and urban waste. Its protocols are notable for rigor in setting conservative baselines and for their acceptance by the California Air Resources Board in the California cap-and-trade program, making CAR protocols a bridge between voluntary and compliance markets. Verra also accepts most CAR protocols (excluding forest protocols) for use in the VCS program.
Plan Vivo
Plan Vivo, established in 1994 in Scotland, focuses exclusively on smallholder and community land use projects in developing countries. Its standards are designed for low-income contexts where communities often lack access to the technical and financial resources required by larger crediting programs. Plan Vivo certificates (PVCs) typically command premium prices because of their demonstrated community ownership and livelihood co-benefits, and appeal to buyers with strong social impact priorities. Notable Plan Vivo projects include the Scolel Te project in Mexico and the Trees for Global Benefits programme in Uganda.
ART TREES
Architecture for REDD+ Transactions (ART) operates TREES (The REDD+ Environmental Excellence Standard), which credits emission reductions at jurisdictional (national or sub-national government) scale rather than project scale. This is a significant departure from project-based approaches. Jurisdictional crediting avoids the baseline leakage and permanence concerns inherent in isolated forest projects by accounting for deforestation across an entire country or region. ART TREES credits have been accepted by CORSIA and have attracted buyers including airlines and large corporates seeking large-volume, jurisdictionally robust credits.
| Program | Founded | Focus | Credit Type | Scale |
|---|---|---|---|---|
| Verra VCS | 2005 / 2007 | All project types, global | VCU | Very large (70%+ market share) |
| Gold Standard GS4GG | 2003 / 2017 | SDG co-benefits, community | GSVER | Large (second largest) |
| ACR | 1996 | North America, compliance linkage | ERT | Medium |
| CAR | 2001 | North America, compliance linkage | CRT | Medium |
| Plan Vivo | 1994 | Smallholder / community land use | PVC | Small (premium niche) |
| ART TREES | 2021 | Jurisdictional REDD+ | TREE credit | Growing |
The ICVCM as Meta-Standard
The Integrity Council for the Voluntary Carbon Market (ICVCM) does not operate its own registry or issue credits. Instead, it functions as a meta-standard: a layer above individual programs that assesses whether those programs and specific methodology categories meet the 10 Core Carbon Principles (CCPs). Programs and methodology categories that pass this assessment may use the CCP label on approved credits, signalling compliance with the market's highest integrity benchmark.
As of 2024, both VCS and Gold Standard are ICVCM-eligible programs, and several methodology categories within each have received CCP approval. The CCP label is becoming an increasingly important quality signal for institutional buyers, particularly those responding to stakeholder scrutiny of greenwashing risks.
Programs as Cuisines, ICVCM as Food Safety Authority
Think of VCS, Gold Standard, ACR, and the others as different cuisines: each has a distinct character, methodology, and appeal. The ICVCM is like a national food safety authority that certifies which restaurants meet a minimum hygiene standard, regardless of cuisine type. The CCP label does not say one cuisine is better than another; it says this establishment meets the baseline threshold that all reputable restaurants should meet.
Key Takeaways
- 1Gold Standard GS4GG is the second-largest voluntary crediting program, founded by NGOs specifically to require stronger sustainable development co-benefits, stakeholder consultation, and safeguards than the CDM
- 2ACR and CAR are North American programs with direct compliance market linkages; their protocols are accepted in the California-Quebec cap-and-trade system
- 3Plan Vivo focuses on smallholder and community projects in developing countries, commanding premium prices for demonstrated social impact
- 4ART TREES addresses the scale limitations of project-based REDD+ by crediting at jurisdictional (national or sub-national) level, reducing leakage and permanence risks
- 5The ICVCM functions as a meta-standard above all programs, awarding the CCP label to methodology categories that meet the 10 Core Carbon Principles