Gold Standard vs Verra vs Puro.earth: which carbon registry?

Three names come up constantly in carbon market conversations: Gold Standard, Verra, and Puro.earth. They all issue carbon credits, but they work very differently. Here is what separates them and how to decide which matters for your situation.

Why the registry you choose matters

Not all carbon credits are equal, and a large part of what determines quality is the standard that issued them. The registry sets the rules: which project types qualify, how baselines are calculated, what level of co-benefits is required, how frequently verification must occur, and how permanence risk is managed. Buyers increasingly scrutinise registry choice when evaluating credits, and some corporate net zero frameworks specify which standards they will accept.

Gold Standard

Gold Standard was founded in 2003 by WWF and other NGOs specifically to raise the bar above the Kyoto Protocol's Clean Development Mechanism. Its name reflects its original purpose: to be the premium tier.

Gold Standard requires projects to demonstrate benefits across multiple Sustainable Development Goals (SDGs) — not just emissions reduction. A cookstove project, for example, must show it reduces indoor air pollution (health), reduces time spent collecting fuel (gender equity), and reduces deforestation pressure (ecosystems), not just that it cuts CO₂. This makes Gold Standard projects more complex and more expensive to develop, but it also means they are easier to defend to stakeholders.

Gold Standard is strongest in the household energy and access space: cookstoves, solar lanterns, biogas digesters, clean water systems. It is also active in renewable energy and forestry, though its forestry methodology is less dominant than Verra's.

Typical Gold Standard credits trade at $8–40 per tonne, with cookstove projects at the higher end due to their co-benefit profile and the cost of monitoring household-level behaviour at scale.

Verra (Verified Carbon Standard)

Verra administers the Verified Carbon Standard (VCS), which is the largest voluntary carbon standard by volume. The majority of voluntary carbon credits issued globally carry a Verra VCS certification, known as VCUs (Verified Carbon Units).

Verra's strength is coverage. It accepts a wider range of project types than any other standard, including the controversial REDD+ (Reducing Emissions from Deforestation and forest Degradation) category. REDD+ projects have faced significant criticism in recent years following investigative journalism that questioned whether some projects generated the emission reductions they claimed. Verra has responded by tightening its REDD+ methodology, but buyer scrutiny of Verra REDD+ credits remains high.

For project types outside REDD+ — agriculture, industrial process improvement, blue carbon, and others — Verra's methodologies are well-established and widely accepted. Its registry infrastructure is robust and transparent.

VCS credits trade at $3–25 per tonne depending heavily on project type. REDD+ avoidance credits sit at the lower end. High-quality Verra blue carbon or improved forest management credits can reach $15–25.

Puro.earth

Puro.earth is different in kind from Gold Standard and Verra. It does not accept avoidance projects at all. Every credit on the Puro.earth registry represents carbon that has been physically removed from the atmosphere and stored — either in biochar, harvested wood products, bio-based building materials, or enhanced weathering applications.

This focus on removal rather than avoidance is why Puro.earth credits command dramatically higher prices. Buyers who need to demonstrate genuine net negative impact — rather than offsetting ongoing emissions — increasingly look to removal registries. Some corporate net zero frameworks now require removal credits for any residual emissions claimed as offset.

Puro.earth credits (called CORC — Carbon Removal Certificates) trade at $100–500 per tonne. Biochar credits typically sit at $100–250. Enhanced weathering and direct air capture credits can reach $300–500.

Are there other standards worth knowing?

Yes. Plan Vivo focuses on smallholder and community-based projects in the Global South and is respected for its community benefit model. The American Carbon Registry (ACR) and Climate Action Reserve (CAR) focus primarily on North American projects and are used within California's compliance market as well as the voluntary market. The newer Cercarbono registry is active in Latin America.

For engineered removal beyond Puro.earth, some buyers work directly with project developers using bilateral contracts rather than a standard registry — particularly for direct air capture, where the market is still developing its verification infrastructure.

Which should you use?

The right answer depends on what you are trying to achieve:

If you are buying credits to meet a voluntary net zero commitment and want to communicate co-benefits to stakeholders, Gold Standard is defensible and broadly respected.

If you are a project developer and need a methodology that fits your specific project type, Verra VCS has the widest coverage and most established infrastructure — but avoid REDD+ unless you have high confidence in the specific project's quality.

If you are claiming to reach net zero and need to offset residual emissions that cannot be eliminated, Puro.earth or another removal registry is increasingly the credible choice. Avoidance credits alone are insufficient for genuine net zero claims under most current frameworks.

Tool via The Carbon Workbench

The Carbon Workbench Methodology Selector can help you work through your specific project type and requirements to get a more precise recommendation.

Key takeaway

Gold Standard and Verra both issue avoidance credits and are suited to different use cases. Puro.earth issues removal-only credits and commands a significant premium. For businesses making net zero claims, the direction of travel is toward prioritising removal credits for residual emissions — which makes understanding Puro.earth increasingly important.