Buy carbon credits with confidence. Fund what matters.
We combine innovative market infrastructure with expert-led portfolio design to help organizations finance high-quality climate projects with confidence. Whether you’re purchasing a few tonnes or building a long-term climate strategy, we offer flexible solutions tailored to your needs.
Why Buy Carbon Credits with Carbonmark Marketplace?
Verified Carbon Projects
All listed projects undergo independent third-party verification and meet rigorous quality criteria to ensure real climate impact.
Seamless Offsetting at Any Scale
Whether you’re offsetting 0.001 or 1,000,000 tonnes, Carbonmark makes it easy—through a user-friendly marketplace or API integration.
Global Supply, One Platform
Browse 150+ verified carbon projects across 20+ countries, spanning both established and emerging methodologies.
Real-time Retirement & Proof
Retire credits in seconds, with every transaction recorded on a publicly verifiable blockchain. Receive a digital certificate to showcase your climate action.
Not Sure Which Carbon Credits Are Right for You?
Download Our Buyer’s Guide for Selecting Carbon Credits.
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A practical handbook to help you navigate the carbon market and align credit purchases with your broader business goals, brand identity, market positioning, and sustainability strategy.
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This guide equips you with the tools to unlock the full potential of carbon markets—maximizing environmental impact while strengthening brand value.
Choose From Diverse Carbon Projects
We know what we sell. You know what you buy.
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Explore a global selection of verified carbon projects spanning diverse methodologies and leading carbon registries. Whether you're looking to buy carbon credits from nature-based solutions, renewable energy, or community-driven initiatives, Carbonmark offers a transparent and straightforward way to support projects that align with your sustainability goals.
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Fund Ocean Alkalinity Enhancement in Italy
Limenet is an Italian climate tech startup pioneering carbon removal through its patented pH-equilibrated Ocean Alkalinization technology. By mimicking natural processes, Limenet permanently stores COâ‚‚ in seawater as calcium bicarbonates.
Price per tonne:
$680.00
Tonnes available:
15
Support Organic Waste Composting in the USA
The Black Earth Organic Waste Compost project in Massachusetts, USA, is an organic waste composting initiative operational since December 1, 2021, diverting food waste from landfills to reduce 7,000 tCO2e annually.
Price per tonne:
$19.50
Tonnes available:
5,800
Drive Paraguay’s Reforestation
The Forestal Río Aquidabán project is restoring 301 hectares of degraded grasslands in Concepción, northeastern Paraguay, through a silvopastoral agroforestry system that integrates reforestation with sustainable cattle ranching.
Price per tonne:
$20.23
Tonnes available:
1,500
How to Buy Carbon Credits with Carbonmark
Choose a project. Evaluate the impact. Get proof of your climate action. Share that you care.
Go to our marketplace.
If you want to offset your carbon emissions regularly and at scale, consider using the Carbonmark API, which can be seamlessly integrated into your corporate software.
Portfolio Management, Quality Assurance and Due Diligence
We help you navigate a complex and fragmented market.
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With 50+ years of combined experience in environmental markets, we bridge information gaps and provide the confidence needed to make informed decisions.
Our team conducts deep due diligence beyond standard documentation, including:
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Independent third-party interviews (e.g. NGOs operating locally)
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Assessment of project implementation and co-benefits
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Evaluation of long-term climate impact and delivery risk