Introduction
If you are buying carbon credits in 2026, the provider you choose decides how defensible your claim is. Whether or not your company still falls under the CSRD after the EU's 2025 Omnibus reforms narrowed its scope, buyers work to the ICVCM Core Carbon Principles as a quality benchmark and face closer scrutiny of every offsetting claim they make. This comparison reviews five carbon credit companies on project quality, verification, pricing transparency and the support they give your sustainability team.
We evaluated five leading carbon credit providers in 2026 on project quality, verification rigour, pricing transparency, and strategic support to help you make an informed decision.
"In 2026, the best carbon credit providers differentiate on verification rigour and portfolio transparency, not price alone."
Bernard de Wit, Founder
What are carbon credits?
A carbon credit is a tradable permit representing one tonne of CO2 either avoided or removed from the atmosphere. Credits trade in two systems: mandatory compliance markets, where governments cap emissions, and voluntary markets, where organisations buy credits to compensate emissions they cannot yet cut. Broadly, a credit is either carbon removal (actively taking CO2 out of the air) or carbon avoidance (preventing new emissions).
For the full explanation, see our guide to what carbon credits are and how to use them.
What is a carbon credit company?
A carbon credit company sources, verifies and sells carbon credits to organisations compensating emissions they cannot yet cut. The category covers three distinct models. Brokers and marketplaces resell credits from third-party projects. Project developers originate and run the projects themselves. Advisory-led providers combine credit supply with strategy, due diligence and reporting support.
The distinction matters for buyers. A developer carries direct responsibility for the quality of its projects, while a broker depends on the standards it chooses to apply. When you compare the companies below, look past the label and ask who is accountable for verification, how projects are screened, and whether the provider can evidence impact under the ICVCM Core Carbon Principles.
The importance of carbon offsetting
Carbon offsetting lets organisations compensate unavoidable emissions by funding projects that remove or prevent greenhouse gases, while they keep cutting emissions at source. Used well, it channels finance into nature-based solutions, clean energy and community benefits.
Would you like to understand how offsetting fits into the broader sustainability picture? Read more about the difference between carbon neutral and net zero.
Why carbon offsetting is more than just compensation
For some companies, carbon offsetting feels like a box to tick. But for businesses that take climate seriously, it’s part of a bigger strategy. The aim is measurable progress against a reduction target.
Offsetting takes responsibility for emissions you cannot yet avoid, while funding projects that protect or restore ecosystems. It does not substitute for reducing those emissions in the first place.
Done right, offsetting can:
Support nature-based solutions like reforestation and regenerative agriculture
Fund clean energy access and low-emission technologies in emerging economies
Create local jobs and improve livelihoods in climate-vulnerable communities
Deliver measurable environmental and social impact, not just abstract claims
It also gives stakeholders evidence of action rather than intent.
Benefits for companies
Carbon offsetting provides a cost-effective way to reduce greenhouse gas emissions, especially compared to direct operational changes.
The measurable results that arise from this are valuable for sustainability reporting and help in achieving ESG objectives. In a market where climate awareness is becoming increasingly important, this gives companies a clear competitive advantage. They can differentiate themselves from competitors and respond to the growing demand for sustainable products and services.
Compliance and voluntary programs
The carbon market consists of two main categories: compliance markets and voluntary markets. These programs form the backbone of the global system for emission reduction.
Compliance markets
Compliance markets are mandatory programmes where governments set binding emission caps. Key examples include:
Clean Development Mechanism (CDM): A UN program that certifies emission reductions in developing countries
Regional Greenhouse Gas Initiative (RGGI): A partnership between US states for CO2 reduction
EU Emissions Trading System (EU ETS): The largest cap-and-trade system in the world
Voluntary markets
Voluntary markets let companies buy credits beyond any legal requirement. Key standards include:
Verra: Manages the Verified Carbon Standard (VCS) programme with strict certification requirements
Gold Standard: Certifies projects with a focus on sustainable development and social impact (see our best Gold Standard projects)
American Carbon Registry: Specialises in North American projects
Oncra: Certifies projects in Europe
Puro.earth: Focuses on carbon removal projects
Certification bodies that ensure quality
Independent certification bodies validate projects, verify emission reductions and guard against double-counting, which is what lets buyers trust a credit. The strength of that verification is exactly what separates high-quality credits from low-quality ones.
See how we go further with our 100+ indicator Quality Framework.
How we ranked these carbon credit providers
Not all carbon credit providers deliver the same quality, transparency, or support. To create this comparison, we assessed each provider across five weighted criteria:
Project quality & verification (30%). Are projects certified by recognised standards (Verra VCS, Gold Standard, Puro Earth)? Does the provider screen for additionality, permanence, and co-benefits beyond the registry baseline? Do their projects align with the ICVCM Core Carbon Principles?
Pricing transparency (20%). Is pricing clearly communicated upfront? Can you see what you're paying per tonne and how the price breaks down between project cost, intermediary margin, and retirement fees?
Portfolio diversity (20%). Does the provider offer both carbon removal and carbon reduction projects? Is there geographic diversity? Can you build a balanced portfolio across nature-based and technology-based solutions?
Strategic support & reporting (20%). Does the provider help you integrate offsetting into your wider climate strategy? Do they support CSRD reporting, SBTi alignment, or stakeholder communication?
Innovation & market reputation (10%). Is the provider investing in new methodologies, better verification technology, or sector-leading thought leadership?
At Regreener, we evaluate every carbon credit project using a proprietary framework of over 100 quality indicators, covering additionality, permanence, governance, co-benefits, and risk factors. That lens informed how we assessed each provider in this guide.
💡 Expert tip: Don't choose a carbon credit provider on price alone. The cheapest credit often carries the highest reputational risk. Focus on verification rigour, portfolio transparency, SBTi alignment and whether the provider can evidence impact under the ICVCM Core Carbon Principles.
Bernard de Wit, Founder
The 5 best carbon credit providers in 2026
We chose these five because they represent the models a European buyer actually compares in 2026: an advisory-led provider (Regreener), a large project developer (South Pole), a platform (ClimatePartner), a strategy consultancy (Anthesis) and a bank-backed agroforestry programme (Rabo Carbon Bank). They are not interchangeable, so each entry notes who it suits and what to check.
1. Regreener
Regreener is a B Corp-certified carbon credit provider that combines rigorous project vetting with hands-on strategic support. Unlike marketplace platforms where you self-serve, Regreener acts as an extension of your sustainability team, helping you build a portfolio you can defend under scrutiny.
Every project in Regreener's portfolio is screened using a proprietary framework of over 100 quality indicators, covering additionality, permanence, social impact, governance, and environmental co-benefits. This makes it one of the most rigorous screening processes in the European voluntary carbon market.
Regreener supports over 200 companies across Europe, including BDO, Capital A and Valcon, with clients across water utilities, manufacturing, and professional services. As a certified B Corp, the company is independently verified for meeting high standards of social and environmental performance.
Key points of Regreener's approach:
The company distinguishes itself by its science-based approach and strict verification processes. Each project is thoroughly evaluated based on:
Additionality
Permanence
Social impact
Environmental benefits
Regreener's project portfolio includes two main categories: carbon removal and carbon reduction projects. Carbon removal focuses on natural solutions such as reforestation initiatives, regenerative agriculture, improved soil carbon storage, and innovative projects involving biochar, direct air capture (DAC), seaweed and mangroves.
"Regreener evaluates every project across 100+ quality indicators, making it one of the most rigorous screening processes in the European voluntary carbon market."
Bernard de Wit, Founder
Strengths
Proprietary 100+ indicator quality framework, among the most thorough in the market
B Corp certified, with third-party validation of social and environmental standards
Hands-on, advisory approach that extends your team rather than serving as a transaction platform
Balanced portfolio of removal and reduction projects across multiple geographies
Strong alignment with ICVCM Core Carbon Principles and emerging quality standards
Dutch and European market expertise with international project reach
Best For
Companies that want verified, high-integrity carbon credits with strategic guidance. Particularly strong for European companies that need a provider who understands CSRD reporting requirements and EU regulatory context.
Case Studies: learn how Regreener supports 200+ companies across Europe with verified carbon credit portfolios, including clients in manufacturing, professional services and retail.
Certification and standards
Regreener sources credits certified under Verra’s VCS, the Gold Standard and Puro.earth, and screens every project against its own 100+ indicator quality framework before it reaches a client shortlist.
2. South Pole
South Pole is a Zurich-based project developer and climate consultancy, historically one of the largest originators of voluntary carbon credits, with projects spanning forestry, renewable energy and energy efficiency across Asia, Africa and Latin America. It suits large enterprises that want one partner to build and manage a net-zero strategy end to end rather than buy credits off the shelf.
Its scale cuts both ways for buyers. As a developer, South Pole carries direct responsibility for the projects it originates, so its recent project quality and the changes it has made to baseline-setting matter more here than they would with a pure reseller.
South Pole has also been at the centre of the voluntary market’s most public integrity dispute. Following investigative reporting in late 2023 that the Kariba REDD+ project in Zimbabwe had overstated avoided deforestation, South Pole ended its role as the project’s carbon asset developer in October 2023, and co-founder Renat Heuberger resigned as CEO in November 2023. Verra suspended and reviewed the project; its investigation, concluded in 2025, found that a majority of the roughly 27 million credits issued were in excess, and Verra is seeking compensation. Buyers considering South Pole should ask directly how baseline setting and methodology review have changed since 2023.
Certification and standards
As a carbon asset developer, South Pole originates and manages projects certified mainly under Verra’s VCS and the Gold Standard.
3. ClimatePartner
ClimatePartner, based in Munich, is a platform-led provider that pairs carbon-accounting software with a catalogue of offset projects, used by more than 5,000 mostly SME and consumer-brand clients. It suits companies that want one digital tool to measure a footprint, buy credits and produce customer-facing communication.
Buyers should weigh one development in the company’s recent history. In 2023 ClimatePartner announced it would phase out its widely used "carbon neutral" product label, replacing it with a "ClimatePartner certified" label that requires companies to set emission reduction targets. The change tracked mounting pressure on neutrality claims, and in June 2024 the German Federal Court of Justice ruled that unexplained "climate neutral" advertising is misleading. If your goal is a defensible public neutrality claim, confirm exactly what the current label certifies before you rely on it.
Certification and standards
ClimatePartner sources credits from projects certified under Verra’s VCS and the Gold Standard for its offsetting platform.
4. Anthesis
Anthesis is a large international sustainability consultancy (B Corp certified, headquartered in the UK) rather than a credit marketplace. It advises corporates on decarbonisation strategy and helps them source and verify credits across recognised standards. It earns a place here for buyers who need the strategy and the procurement handled together, particularly larger organisations with complex, sector-specific footprints.
Because Anthesis acts as an adviser rather than a registry or developer, the quality of the credits you end up with depends on the standards it selects on your behalf, so the same due-diligence questions apply.
Certification and standards
Anthesis acts as an adviser rather than a registry, helping clients select and verify credits across recognised standards such as Verra’s VCS and the Gold Standard.
5. Rabo Carbon Bank
Rabo Carbon Bank, an initiative of Rabobank Nederland, offers an innovative approach to trading carbon credits. This bank connects farmers directly with companies that want to offset their CO2 emissions, resulting in a transparent and efficient system.
Rabo Carbon Bank issues Carbon Removal Units (CRUs) through its Acorn programme, certified by Plan Vivo rather than Verra. The Acorn methodology uses agroforestry with smallholder farmers, tracked through remote sensing, and has been externally assessed by accredited validation and verification bodies. To cover reversals, 15% of issued units are held in a buffer pool with third-party oversight from the Plan Vivo Foundation. This provides:
Reliable verification of CO2 reduction
Strict monitoring of project results
Standardized measurement methods
Rabo Carbon Bank distinguishes itself by its focus on regenerative agriculture. Farmers receive financial support for:
Implementing sustainable farming practices
Increasing carbon storage in the soil
Improving biodiversity
The bank employs a revenue model in which around 70% of carbon credit revenue flows directly back to the smallholder farmers. This approach encourages the adoption of climate-friendly farming methods and strengthens the position of farmers in the international carbon market.
Certification and standards
Rabo Carbon Bank’s Acorn programme is certified by Plan Vivo, issuing agroforestry Carbon Removal Units rather than sourcing from multiple registries.
Would you like to know more? Discover the opportunities here.
Provider | Certification standards | Removal vs reduction | Key focus / USP | Best suited for |
|---|---|---|---|---|
Regreener | Verra VCS, Gold Standard, Puro.earth (+ own 100+ indicator framework) | Both removal & reduction | Qualitative and verified climate projects, local and international | SMEs or large companies seeking tangible and validated impact |
South Pole | Verra VCS, Gold Standard | Both (nature-based) | Global net-zero strategy consulting | Large enterprises |
ClimatePartner | Verra VCS, Gold Standard | Both | All-in-one carbon offsetting platform | SMEs and companies looking for a digital, end-to-end solution |
Anthesis | Advisory across Verra VCS & Gold Standard | Advisory (both) | Sustainability consultancy & strategy | Large organizations with complex, sector-specific needs |
Rabo Carbon Bank | Plan Vivo (Acorn) | Removal (agroforestry) | Direct farmer-to-business connection | Companies focused on agriculture and the food supply chain |
Per-provider pricing and minimum order are quoted on request. Typical 2026 market prices run from about €5 to over €100 per tonne, with removal credits at the upper end.
Other providers worth considering
The five companies above are not the only credible options. Depending on your sector and volume, these providers are also worth a look:
Terrapass. US-focused retail and business offsetting across nature-based and renewable projects.
Carbon Direct. Science-led advisory and procurement with a focus on high-durability carbon removal.
Frontier. An advance market commitment, backed by Stripe, Alphabet, Meta and others, that pre-purchases permanent carbon removal.
Climate Impact Partners. Large-scale project development and corporate offsetting programmes.
Patch. An API-first platform for embedding carbon removal and reduction purchases.
Cloverly. A developer-friendly API connecting buyers to vetted credits.
Which companies buy the most carbon credits?
Corporate demand is concentrated among a small group of large buyers. According to market trackers, Shell was the single largest retirer of credits in 2025 at around 9.75 million tonnes, mostly nature-based, while Microsoft has led demand for durable carbon removal, accounting for roughly 43% of removal purchases in the first quarter of 2026, including a one-million-tonne biochar deal. Google, Amazon and JP Morgan Chase are also among the most active buyers (source: AlliedOffsets).
Once you have a shortlist, these are the questions that separate a credible provider from a risky one.
Red flags when choosing a carbon credit provider
A credible provider answers hard questions without hesitation. Treat the following as warning signs when you assess a shortlist:
No published methodology for how projects are screened or scored.
No named registry (such as Verra, Gold Standard, Puro.earth or Plan Vivo) behind the credits.
No retirement proof, so you cannot confirm a credit was cancelled on your behalf.
A price far below the market with no explanation of why.
Refusal to disclose project IDs or link to the registry record.
No reversal or buffer-pool policy to cover losses if a project underperforms.
If a provider cannot address these points in writing, the reputational risk usually outweighs the saving.
How to run due diligence on a provider in five steps
Ask for the methodology. Request the written framework the provider uses to screen and score projects.
Check the registry. Confirm each project is listed with a recognised standard and has a public project ID.
Verify retirement. Ask for proof that credits are retired in your name, with serial numbers.
Test the pricing. Ask how the price breaks down between project cost, margin and retirement, and why it sits where it does.
Review the safeguards. Confirm there is a reversal or buffer-pool policy and a plan for monitoring over time.
Request a free portfolio proposal and we will walk you through each step against real projects.
Carbon credit pricing: how much does offsetting cost?
The cost of one carbon credit (one tonne of CO2 offset) varies widely and is critical to your total investment. Prices generally range between €5 and over €100 per tonne of CO2, depending on the project quality.
Three factors determine the price:
Project type (Removal vs. Reduction): Projects that actively remove CO2 from the atmosphere (like Direct Air Capture or certain nature-based solutions) are significantly more expensive than those that reduce future emissions (such as preventing deforestation or funding clean cooking stoves).
Certification and standard: Credits with the highest verification standards (like Gold Standard or Verra’s VCS) are pricier because they offer the highest guarantee of additionality and social impact.
Location and scale: Large-scale projects can be more cost-efficient, but there is a growing trend to invest in local projects (such as those by Regreener or Rabo Carbon Bank) which may command higher prices due to their measurable local impact and transparency.
"Carbon credit prices in 2026 range from €5 to over €100 per tonne, with removal credits commanding a significant premium over reduction credits."
Bernard de Wit, Founder
Future trends in the CO2 market
The voluntary carbon market is on the brink of significant growth, driven by:
Increasing corporate investments in high-quality carbon offset projects
Tighter regulations regarding emission reduction
Technological innovations in the verification and tracking of carbon credits
Companies are increasingly focusing on local offset projects with direct impact on communities. This trend strengthens the connection between climate action and social development.
The emerging sectors in the CO2 market show promising diversification. Regenerative agriculture is gaining ground as an effective method for carbon sequestration, where farmers are rewarded for sustainable farming practices that retain CO2 in the soil.
Blue carbon projects, aimed at protecting and restoring marine ecosystems such as mangroves and seagrass, demonstrate that oceans play a crucial role in natural carbon storage. In addition, direct CO2 capture from the air is undergoing rapid development, using innovative technologies to remove greenhouse gases directly from the atmosphere and store them permanently.
The prices of carbon credits are expected to rise due to increasing demand and quality requirements. This stimulates investments in new technologies and innovative carbon sequestration projects.
Challenges and risks in the CO2 market
The carbon market faces various complex challenges that can affect the effectiveness of carbon offsetting. A critical issue lies with the verification standards. Validating actual emission reductions remains a technical challenge, with different measurement methods and standards leading to inconsistent results.
The risk of greenwashing is a growing concern within the sector. Companies can use carbon credits as window dressing without making substantial changes to their operations. This undermines the credibility of the entire carbon market.
"The ICVCM's Core Carbon Principles are fast becoming the industry benchmark for credit quality, and not all providers’ portfolios meet the threshold."
Bernard de Wit, Founder
In addition, many projects suffer from insufficient additionality, meaning they would have been carried out even without the carbon credits. Another significant problem is the lack of transparency in the value chain, making it difficult to verify the actual impact of offsetting projects.
The presence of these low-quality offsets damages trust in the market and reduces the effectiveness of climate action. Stricter regulation and standardization are needed to address these challenges. Innovative technologies such as blockchain can contribute to improved verification and transparency in the sector.
Worried about greenwashing?
Our projects are science-backed and guarantee additionality and stringent verification. Find out more about the Quality Framework we use to validate project impact.
Conclusion
The carbon credit market of 2026 offers unprecedented opportunities for businesses and individuals to actively contribute to climate protection. High-quality carbon credit projects form the backbone of an effective climate strategy.
The provider you choose determines whether your offsetting claim survives scrutiny from an auditor, a regulator or a journalist. Ask any shortlisted provider for their methodology, their registry IDs and their retirement records before you sign.
Request your free carbon credit portfolio proposal to see how Regreener answers those three questions.
