Buy carbon credits that pass every audit

Senken analyses 600+ data points per project and rejects 95% of those assessed. Every selected project comes with a due diligence report explaining its impact and risks. You get one procurement contract, a Project Integrity Report for every project, CSRD documentation and ongoing monitoring. Customers include Deutsche Telekom, Vodafone, Lufthansa Group, R+V and DZ Bank.

Our Sustainability Integrity Index assesses additionality, measurement accuracy, carbon storage permanence, and community and biodiversity impacts. We cross-check project claims using historical data and geospatial imagery where relevant and independent ratings from providers such as BeZero and Sylvera.

Certification is only the starting point: a 2024 Max Planck-led study found that fewer than 16% of credits issued to the projects studied represented actual emissions reductions. Our additional due diligence gives you evidence to support your purchase.

• Avoidance: prevents emissions, for example by protecting forests threatened by deforestation.
• Nature-based removals: stores atmospheric CO2 in trees or soils through reforestation and soil carbon projects.
• Permanent removals: stores carbon for centuries to millennia through methods such as biochar, direct air capture with storage, enhanced rock weathering and biomass storage.

For climate-neutrality goals, we build blended or removal-only portfolios matched to your intended claim. Blending avoidance and removals lowers the average cost per tonne.

For net zero, we secure permanent removals for residual CO2 after deep emissions reductions, with delivery aligned to your target year and relevant SBTi requirements.

We design your portfolio, select projects, negotiate prices and consolidate purchases under one contract. Multi-year offtakes include delivery schedules and contractual protections for delays.

You receive:

• Project due diligence reports detailing impact and risks.
• Project and portfolio documentation supporting CSRD disclosures and relevant SBTi reporting.
• Registry records confirming retirement on your behalf, once completed.

Portfolio Manager keeps your documentation, delivery schedules and quarterly monitoring updates in one place.

Blended portfolios start at approximately €25 per tonne of CO2, combining:

• Avoidance credits: €8–€25 per tonne.
• Nature-based and permanent removals: €20–€400 per tonne.

Prices depend on the project mix, volume and delivery dates. Above 1,000 tonnes annually, our team manages portfolio design, procurement and reporting. For smaller purchases, Senken Checkout lets you buy credits online with the same quality standards and reporting documentation.