Company lists · Data refreshed September 2026

Top 25 Greenhouse gas removal companies worldwide

Name: Greenhouse gas removal companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 1,429 companies tracked

RevenueBase identified 1,429 greenhouse gas removal companies worldwide as of September 2026 and tracks 16,648 professional contacts across them, including 7,828 with verified work emails. The United States is the largest market and London the largest hub.

This list covers greenhouse gas removal companies worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 19, 2026. Country and city lists for greenhouse gas removal companies follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 19, 2026 86% judged on-target in blind review

1,429Companies

16,648Contacts tracked

7,828Verified emails

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The 25 largest greenhouse gas removal companies worldwide

Ranked by team size

Top 25 of 1,429 greenhouse gas removal companies worldwide, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to greenhouse gas removal companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	California Resources Corporation	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,095 contacts →
	Indirect evidence “California Resources Corporation (CRC) is an independent energy and carbon management company committed to energy transition.” Source: RevenueBase Database · checked Sep 19, 2026
2	Climeworks	Partial evidence	Opfikon, SwitzerlandHQ checked Sep 19, 2026	201-500	435 contacts →
	Partial evidence “Climeworks is a leading high-quality carbon removal provider, combining decades of expertise in Direct Air Capture (DAC) technology with holistic carbon removal solutions.” Source: RevenueBase Database · checked Sep 19, 2026
3	Ecosecurities	Indirect evidence	Geneva, SwitzerlandHQ checked Sep 19, 2026	51-200	406 contacts →
	Indirect evidence “EcoSecurities is a global leader in climate solutions, harnessing the power of nature, technology, and finance to accelerate decarbonisation efforts worldwide.” Source: RevenueBase Database · checked Sep 19, 2026
4	Lanzatech	Indirect evidence	Skokie, IL, United StatesHQ checked Sep 19, 2026	201-500	338 contacts →
	Indirect evidence “Our way of life is built on carbon, from our fuel sources to the materials in our consumer products, but we need a more sustainable way to source it to protect the future of our…” Source: RevenueBase Database · checked Sep 19, 2026
5	3degrees Group, INC	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 19, 2026	201-500	324 contacts →
	Indirect evidence “3Degrees is a leading global climate solutions provider, pioneer of environmental markets, and Certified B Corporation.” Source: RevenueBase Database · checked Sep 19, 2026
6	Picarro	Indirect evidence	Santa Clara, CA, United StatesHQ checked Sep 19, 2026	201-500	297 contacts →
	Indirect evidence “Reducing emissions, detecting leaks, mitigating risk, optimizing operations, ensuring compliance and advancing research are some of the challenges facing our clients.” Source: RevenueBase Database · checked Sep 19, 2026
7	Svante	Strong evidence	Burnaby, BC, CanadaHQ checked Sep 19, 2026	201-500	284 contacts →
	Strong evidence “WHAT WE DO We make filters and rotary contactor machines that capture and remove CO2, a greenhouse gas, from industrial emissions and the air.” Source: RevenueBase Database · checked Sep 19, 2026
8	SLB Capturi	Indirect evidence	Lysaker, NorwayHQ checked Sep 19, 2026	201-500	243 contacts →
	Indirect evidence “At SLB Capturi, we are dedicated to making carbon capture a reality today.” Source: RevenueBase Database · checked Sep 19, 2026
9	Nextchem	Indirect evidence	ItalyHQ checked Sep 19, 2026	501-1,000	203 contacts →
	Indirect evidence “NEXTCHEM is MAIRE’s company dedicated to Sustainable Technology Solutions.” Source: RevenueBase Database · checked Sep 19, 2026
10	Anew Climate	Indirect evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	201-500	200 contacts →
	Indirect evidence “Anew Climate is a global leader of diverse climate solutions, bringing innovative products and services to the public and private sectors to help reduce or offset their carbon…” Source: RevenueBase Database · checked Sep 19, 2026
11	Carbon Clean	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	188 contacts →
	Indirect evidence “Carbon Clean is the point-source carbon capture expert, driving the decarbonisation of hard-to-abate industries for more than 15 years.” Source: RevenueBase Database · checked Sep 19, 2026
12	Carbon Engineering	Indirect evidence	Squamish, CanadaHQ checked Sep 19, 2026	51-200	184 contacts →
	Indirect evidence “Carbon Engineering (CE) is a Canadian-based clean energy company leading the commercialization of groundbreaking technology that captures CO₂ directly from air, and a second…” Source: RevenueBase Database · checked Sep 19, 2026
13	Carbon Direct	Indirect evidence	New York, United StatesHQ checked Sep 19, 2026	51-200	172 contacts →
	Indirect evidence “Carbon Direct is a trusted energy and climate solutions company that combines world-class scientific expertise, technical rigor, and market insights to help clients achieve their…” Source: RevenueBase Database · checked Sep 19, 2026
14	BIG	Strong evidence	Bangrak, ThailandHQ checked Sep 19, 2026	201-500	166 contacts →
	Strong evidence “BIG - A Climate Tech Company - is a leader in industrial gas and greenhouse gas reduction technology.” Source: RevenueBase Database · checked Sep 19, 2026
15	LMS Energy	Indirect evidence	Unley, AustraliaHQ checked Sep 19, 2026	201-500	156 contacts →
	Indirect evidence “LMS Energy is Australia’s leading methane abatement and renewable fuels company.” Source: RevenueBase Database · checked Sep 19, 2026
16	Steel Reef	Indirect evidence	Calgary, AB, CanadaHQ checked Sep 19, 2026	51-200	127 contacts →
	Indirect evidence “Steel Reef is a Canadian company that gathers and redistributes wasted emissions to deliver the energy that powers our lives.” Source: RevenueBase Database · checked Sep 19, 2026
17	Skytree	Indirect evidence	Amsterdam, NetherlandsHQ checked Sep 19, 2026	51-200	127 contacts →
	Indirect evidence “Skytree is engineering the CO₂ transition by building machines to capture CO₂ from the air and repurpose it for good: whether it’s reused across different industries or stored…” Source: RevenueBase Database · checked Sep 19, 2026
18	Heirloom	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 19, 2026	51-200	111 contacts →
	Partial evidence “Mitigating the worst impacts of climate change by developing the world’s most cost-effective DAC technology to permanently remove CO2 from the atmosphere.” Source: RevenueBase Database · checked Sep 19, 2026
19	Isometric	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	106 contacts →
	Indirect evidence “Isometric is the agentic certification platform for the industrial economy.” Source: RevenueBase Database · checked Sep 19, 2026
20	Carboncure Technologies	Indirect evidence	Dartmouth, NS, CanadaHQ checked Sep 19, 2026	51-200	100 contacts →
	Indirect evidence “Concrete That Matters: CarbonCure Technologies is on a mission to empower cement and concrete producers with technologies and strategies to achieve the industry's net zero…” Source: RevenueBase Database · checked Sep 19, 2026
21	Fortera	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 19, 2026	51-200	96 contacts →
	Indirect evidence “Fortera is a pioneering green cement manufacturer with production in Redding, California.” Source: RevenueBase Database · checked Sep 19, 2026
22	Tecno Project Industriale TPI	Indirect evidence	Curno, ItalyHQ checked Sep 19, 2026	51-200	89 contacts →
	Indirect evidence “Since its founding in 1987, TPI (SIAD Group) has established itself as an innovative company with a strong focus on operational excellence, safety, and environmental…” Source: RevenueBase Database · checked Sep 19, 2026
23	Octavia Carbon	Indirect evidence	Nairobi, KenyaHQ checked Sep 19, 2026	51-200	85 contacts →
	Indirect evidence “Octavia Carbon builds and deploys Direct Air Carbon Capture (DACC) machines in Kenya, the world's best place to do so.” Source: RevenueBase Database · checked Sep 19, 2026
24	Storegga	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	83 contacts →
	Partial evidence “Storegga, a business established in 2020 as an independent champion for the development of carbon reduction and carbon removal technologies.” Source: RevenueBase Database · checked Sep 19, 2026
25	SCW Systems	Partial evidence	Alkmaar, NetherlandsHQ checked Sep 19, 2026	51-200	81 contacts →
	Partial evidence “At SCW Systems, we develop new ground-breaking technologies that convert waste into green energy and permanently remove CO₂ from the atmosphere.” Source: RevenueBase Database · checked Sep 19, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: greenhouse gas removal companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names greenhouse gas removal companies.
Partial evidence: Its own public description names part of greenhouse gas removal companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name greenhouse gas removal companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 1,429 greenhouse gas removal companies worldwide

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Greenhouse gas removal companies worldwide at a glance

As of Sep 19, 2026

47.0%Verified-email coverage

11.7Average contacts per company

1-10Median size (employees)

3.7%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

905

11-50

417

51-200

201-500

501-1,000

1,001-5,000

10001+

Email recency is reported on each country list linked below.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among greenhouse gas removal companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
Coverage: Every country. Country and city lists for greenhouse gas removal companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “greenhouse gas removal companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names greenhouse gas removal companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among greenhouse gas removal companies, and records with no verified work email.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 7,828 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 19, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Greenhouse gas removal companies by location

11 lists · largest first

Every Greenhouse gas removal companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names greenhouse gas removal companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many greenhouse gas removal companies are there worldwide?

RevenueBase identified 1,429 greenhouse gas removal companies worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

California Resources Corporation, headquartered in Los Angeles, tops this list with the largest team on record.

Which country has the most greenhouse gas removal companies?

The United States leads with 331 companies, followed by the United Kingdom (108) and Canada (98). Every greenhouse gas removal companies list by country and city is linked on this page.

Which city has the most greenhouse gas removal companies?

London leads with 53 headquartered companies, followed by Calgary (28) and Houston (22).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 7,828 verified decision-maker contacts tracked across these 1,429 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 19, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.