Remove carbon as you grow your business

With Stripe Climate, you can direct a fraction of your revenue to help scale emerging carbon removal technologies in just a few clicks. Join a growing group of ambitious businesses changing the course of climate change.

Enrol in one minute

Contribute a fraction of your company’s revenue to fund permanent carbon removal technologies straight from your dashboard in just a few clicks.

Fund permanent carbon removal

We direct 100% of your contribution to carbon removal. Carbon removal projects are sourced and vetted by Frontier, Stripe's in-house team of science and commercial experts.

Share effortlessly

Let your customers know about your commitment with a new badge updated automatically on Stripe-hosted checkout, receipts, and invoices. Our asset kit makes it easy to use the badge anywhere you see fit.

Available now for global businesses

It will take a global, collective effort to scale carbon removal. Stripe Climate is available to Stripe users globally.

Early adopters

Join ambitious businesses

A growing group of early adopters is helping change the course of carbon removal.

The case for funding carbon removal

Carbon removal is critical to counteract climate change

To prevent the most catastrophic effects of climate change, we should aim to limit global average temperature increase to 1.5°C above pre-industrial levels, which corresponds to reducing global annual CO₂ emissions from about 40 gigatons per year as of 2018, to net zero by 2050.

To accomplish this, the world will likely need to both radically reduce the new emissions we put into the air, and remove carbon already in the atmosphere.

Path to limit global temperature increase to ~1.5°C
Limit global temperatures increase to:
Historical emissions ~2°C path ~1.5°C path Current path
Carbon removal needed to limit global temperature increase to ~1.5°C.
Historical emissions via Global Carbon Project,1 "Current path" shows SSP4-6.0,2,3 removal pathways adapted from CICERO.4 For simplicity this chart only shows CO₂, though the modelled scenarios account for other greenhouse gas emissions, all of which will need to be reduced.

However, carbon removal is behind

Existing carbon removal solutions such as reforestation and soil carbon sequestration are important, but they alone are unlikely to scale to the size of the problem. New carbon removal technologies need to be developed – ones that have the potential to be high volume and low cost by 2050 – even if they aren’t yet mature.

Today, carbon removal solutions face a chicken-and-egg problem. As early technologies, they’re more expensive, so don’t attract a critical mass of customers. But without wider adoption, they can’t scale production to become cheaper.

Early adopters can change the course of carbon removal

Early purchasers can help new carbon removal technologies get down the cost curve and up the volume curve. Experience with manufacturing learning and experience curves has shown repeatedly that deployment and scale beget improvement, a phenomenon seen across DNA sequencing, hard drive capacity, and solar panels.

This thinking shaped Stripe’s initial purchases and ultimately led us to launch Frontier, an advanced market commitment (AMC) to buy carbon removal. The goal is to send a strong demand signal to researchers, entrepreneurs, and investors that there is a growing market for these technologies. We’re optimistic that we can shift the trajectory of the industry and increase the likelihood the world has the portfolio of solutions needed to avoid the worst effects of climate change.

Stylised representation of experience curves from the Santa Fe Institute.5

How we find and fund

Our portfolio and scientific reviewers

Stripe Climate works with Frontier, Stripe's in-house team of science and commercial experts committed to carbon removal technologies, to make carbon removal purchases. Frontier is advised by a multidisciplinary group of top scientific experts to help us evaluate the most promising carbon removal technologies. Explore the growing portfolio of projects, read the criteria we use to select them, or view our open sourced project applications.

Target criteria

See what we look for when evaluating projects.

Project applications

View our open source project applications.

Our portfolio

Autumn 2022 projects

Arbor is developing a modular, compact approach to Biomass Carbon Removal and Storage (BiCRS), the process of removing carbon by converting biomass waste to products such as electricity and permanently storing the CO₂ underground. Their technology combines a gasifier that can work flexibly across biomass types with an advanced turbine that maximises electrical efficiency. Arbor’s modular system can be quickly deployed and is designed to be manufactured at substantially lower costs.

Bioenergy with carbon capture and storage

Arca is capturing CO₂ from the atmosphere and mineralising it into rock. It works with producers of critical metals, transforming mine waste into a massive carbon sink. With autonomous rovers, its approach accelerates carbon mineralisation, a natural process storing CO₂ permanently as new carbonate minerals. By creating a system that works directly at the mine site, Arca avoids the cost and emissions of moving material to processing facilities.

Enhanced weathering

Captura is harnessing the ocean for scalable removal by designing an electrochemical process to separate acid and base from seawater. The acid is used to remove CO₂ that’s present in seawater, which is injected for permanent geologic storage. The base is used to treat and return the remaining water safely to the ocean, and the ocean then draws down further CO₂ from the atmosphere. Captura is developing optimised membranes to increase electrical efficiency and reduce removal costs.

Direct ocean capture

Carbon To Stone is developing a new form of direct air capture, in which a solvent that binds CO₂ is regenerated by reacting with alkaline waste materials. By replacing conventional solvent regeneration using heat or pressure changes with direct mineralisation of low-cost alkaline wastes such as steel slag, the team can significantly reduce the energy, and thus the cost, required. The CO₂ is durably stored as solid carbonate materials that can be used for alternative cements.

Direct air capture

Cella increases the options for safe and secure carbon storage via mineralisation. They accelerate the natural process that converts CO₂ into solid mineral form by injecting it into volcanic rock formations together with saline water and geothermal brine waste, with an approach that lowers cost and minimises environmental impacts. Cella’s technology integrates low-carbon geothermal heat and can be paired with a variety of capture methods.

Storage - Geologic mineralisation

CREW is building specialized reactors to enhance natural weathering. The container-based system creates optimised conditions to speed up the weathering of alkaline minerals, and the discharged water stores CO₂ from wastewater safely and permanently as bicarbonate ions in the ocean. CREW’s system makes measuring CO₂ removed easier and can react with CO₂ from a variety of sources, including direct air capture and biomass systems, to maximise scale.

Enhanced weathering

Inplanet accelerates natural mineral weathering to permanently sequester CO₂ and regenerate tropical soils. They partner with farmers to apply safe silicate rock powders under warmer and wetter conditions that can result in faster weathering rates and thus faster CO₂ drawdown. The team is developing monitoring stations to generate public field trial data to improve the field’s understanding of how weathering rates vary under tropical soil and weather conditions across Brazil.

Enhanced weathering

Kodama and the Yale Carbon Containment Lab are deploying a proof-of-concept method of storing waste woody biomass by burying it in anoxic chambers underground, preventing decomposition. The team will experiment with how chamber conditions and above-ground disturbances impact durability and reversal risk.

Biomass burial

Nitricity is exploring the potential of integrating carbon removal into a novel process for the electrified production of clean fertiliser. This process combines carbon-neutral nitrogen compounds, phosphate rock and CO₂, producing nitrophosphates for the fertiliser industry and storing CO₂ durably as limestone. This new pathway could present a low-cost storage solution for dilute CO₂ streams with co-benefits of decarbonising the fertiliser industry.

Storage - Surface mineralisation

Spring 2022 projects

AspiraDAC is building a modular, solar-powered direct air capture system with the energy supply integrated into the modules. Their metal-organic framework sorbent has low temperature heat requirements and a path to cheap material costs, and their modular approach allows them to experiment with a more distributed scale-up.

Direct air capture

Mineral weathering already naturally captures CO₂ at gigaton scale. Lithos accelerates this by spreading basalt on croplands to increase dissolved inorganic carbon in the soil. Their technology uses novel soil models and machine learning to maximise CO₂ removal while boosting crop growth. The team is scaling their empirical verification, river network, and plant-tissue studies to advance measurement of CO₂ drawdown and ecosystem impact.

Enhanced weathering

Travertine is re-engineering chemical production for carbon removal. Using electrochemistry, Travertine produces sulphuric acid to accelerate the weathering of ultramafic mine tailings, releasing reactive elements that convert carbon dioxide from the air into carbonate minerals that are stable on geologic timescales. Their process turns mining waste into a source of carbon removal as well as raw materials for other clean transition technologies such as batteries.

Enhanced weathering

RepAir uses clean electricity to capture CO₂ from the air using a novel electrochemical cell and partners with Carbfix to inject and mineralize the CO₂ underground. The demonstrated energy efficiency of RepAir’s capture step is already notable and continues to advance. This approach has the potential to deliver low-cost carbon removal that minimises added strain to the electric grid.

Direct air capture

This project, a collaboration between 8 Rivers' Calcite and Origen, accelerates the natural process of carbon mineralisation by contacting highly reactive slaked lime with ambient air to capture CO₂. The resulting carbonate minerals are calcined to create a concentrated CO₂ stream for geologic storage, and then looped continuously. The inexpensive materials and fast cycle time make this a promising approach to affordable capture at scale.

Direct air capture

Living Carbon wants to engineer algae to rapidly produce sporopollenin, a highly durable biopolymer which can then be dried, harvested and stored. Initial research aims to better understand the field's thinking on the durability of sporopollenin as well as the optimal algae strain to quickly produce it. Applying synthetic biology tools to engineer natural systems for improved and durable carbon capture has the potential to be a low-cost and scalable removal pathway.

Synthetic biology

Technical reviewers

Brentan Alexander, PhD

Tuatara Advisory
Tech to Market

Stephanie Arcusa, PhD

Arizona State University

Habib Azarabadi, PhD

Arizona State University
Direct Air capture

Damian Brady, PhD

Darling Marine Center University of Maine

Robert Brown, PhD

Iowa State University

Holly Jean Buck, PhD

University at Buffalo

Liam Bullock, PhD

Geosciences Barcelona

Wil Burns, PhD

Northwestern University

Micaela Taborga Claure, PhD

Direct Air capture

Struan Coleman

Darling Marine Center University of Maine

Niall Mac Dowell, PhD

Imperial College London
Biomass / Bioenergy

Anna Dubowik

Negative Emissions Platform

Petrissa Eckle, PhD

ETH Zurich
Energy Systems

Erika Foster, PhD

Point Blue Conservation Science
Ecosystem Ecology

Matteo Gazzani, PhD

Utrecht University Copernicus Institute of Sustainable Development
Direct Air capture

Lauren Gifford, PhD

University of Arizona’s School of Geography, Development & Environment

Sophie Gill

University of Oxford Department of Earth Sciences

Emily Grubert, PhD

University of Notre Dame

Steve Hamburg, PhD

Environmental Defense Fund
Ecosystem Ecology

Booz Allen Hamilton

Energy Technology Team
Biomass / Direct Air Capture

Jens Hartmann, PhD

Universität Hamburg

Anna-Maria Hubert, PhD

University of Calgary Faculty of Law

Lennart Joos, PhD

Out of the Blue

Marc von Keitz, PhD

Grantham Foundation for the Protection of the Environment
Oceans / Biomass

Yayuan Liu, PhD

Johns Hopkins University

Matthew Long, PhD

National Center for Atmospheric Research

Susana García López, PhD

Heriot-Watt University
Direct Air capture

Kate Maher, PhD

Stanford Woods Institute for the Environment

John Marano, PhD

JM Energy Consulting
Tech to Market

Dan Maxbauer, PhD

Carleton College

Alexander Muroyama, PhD

Paul Scherrer Institut

Sara Nawaz, PhD

University of Oxford

Rebecca Neumann, PhD

University of Washington
Biochar / Geochemistry


Energy Technology Team
Biomass / Direct Air Capture

Daniel Nothaft, PhD

University of Pennsylvania

Simon Pang, PhD

Lawrence Livermore National Laboratory
Direct Air capture

Teagen Quilichini, PhD

Canadian National Research Council

Zach Quinlan

Scripps Institution of Oceanography

Mim Rahimi, PhD

University of Houston

Vikram Rao, PhD

Research Triangle Energy Consortium

Paul Reginato, PhD

Innovative Genomics Institute at UC Berkeley

Debra Reinhart, PhD

University of Central Florida
Waste Management

Phil Renforth, PhD

Heriot-Watt University

Sarah Saltzer, PhD

Stanford Center for Carbon Storage
Geologic Storage

Saran Sohi, PhD

University of Edinburgh

Mijndert van der Spek, PhD

Heriot-Watt University
Direct Air capture

Max Tuttman

The AdHoc Group
Tech to Market

Shannon Valley, PhD

Woods Hole Oceanographic Institution

Jayme Walenta, PhD

University of Texas, Austin

Frances Wang

ClimateWorks Foundation

Fabiano Ximenes, PhD

New South Wales Department of Primary Industries
Biomass / Bioenergy


Get answers to common questions about Stripe Climate.