Microsoft has paused all new carbon removal purchases. The company that bought roughly 90 percent of durable CDR last year, more than 45 million tonnes in 2025 alone, is stepping back. Existing contracts continue. New ones are on hold with no resumption date. Microsoft cited a portfolio and market reassessment.

That single decision rewires the entire buy side of the market. The next-largest buyer, Frontier, has contracted around 1.8 million tonnes lifetime. Microsoft was not just the biggest customer. It was the market.

Here is how five voices in the field reacted today.

Robert Höglund: stop chasing speed and scale

Höglund, who has tracked the CDR market for years, framed the pause as a forced strategy reset:

"That Microsoft was going to slow down their carbon removal purchasing was known. They had already contracted most of what they needed. But a hard pause, and so soon, was a bit of a surprise. The need for the CDR sector to focus on 'prove and learn' rather than 'speed and scale' now becomes obvious. Survive on smaller purchases, government grants, philanthropic capital and focus on bringing down costs and proving the methods and MRV (measurement, reporting, and verification) on a smaller scale. That also means not relying on more raises of VC capital unless you have an idea that looks like it's cheaper than everything else in CDR. We still need CDR, the world depends on people staying in the fields continuing to develop the solutions and finding ways to stay alive. Kudos to everyone sticking with it."

The message: cut burn, prove the method, do not bet your runway on the next mega-offtake.

Eve Tamme: the market's biggest known risk just materialised

Tamme, a long-time climate policy advisor, was blunt:

"When Microsoft is stepping aside, who will step up? The biggest risk in the voluntary market for durable CDR seems to have materialised. We need more government purchases, more private buyers, more philanthropic funding for all types and all readiness levels of carbon removal."

Her point lands harder when you sit with the math. If Microsoft was 90 percent of demand, replacing them is not a matter of finding one or two new buyers. It is a matter of building a buyer base from near-zero.

Jason Grillo: who fills the gap, and how?

Grillo zoomed in on the structural questions every developer is now asking:

"Microsoft is pausing carbon removal purchases with enormous implications for the industry. Will other tech companies or industries fill the market gap? Can government purchasing programs achieve necessary scale? How should carbon removal companies adapt?"

His answer: project developers who can show real economic viability through industrial integration and credible co-benefits will be best positioned. Translation: if your only product is a tonne of CO2 stored, and your only customer is a hyperscaler, you have a problem.

Ikarus Janzen: due diligence is about to get brutal

Janzen, who runs Varaha, predicted that buyers will start stress-testing developers the way investors stress-test startups:

"Buyers are looking much deeper into the financial health of project developers. If your financial stability depends on a single project, contract, buyer, or subsidy, signing a multi-year agreement with you is a massive risk."

He listed how Varaha tried to insulate itself: two years of positive cash flow, Series B reserved for scaling rather than survival, diversified revenue, conservative delivery commitments. That is the new bar. Anyone signing a 10-year offtake will want to know you will still exist in year three.

Carbon Herald: the framing

The trade outlet Carbon Herald summed up the shock:

"Microsoft is pausing all new carbon removal purchases. And that's a much bigger deal than it sounds."

It is.

What this actually means

Three things to watch over the next quarter.

1. Cash burn at pre-revenue developers. Companies that priced their growth model around a Microsoft offtake in 2026 or 2027 now have to either land a different anchor customer fast, or shrink. Expect quiet layoffs at unannounced startups before you see the press releases.

2. Government procurement as the swing buyer. Höglund and Tamme both pointed to public buying programs. The U.S. DOE Carbon Negative Shot purchases, the EU's emerging CDR procurement under the Industrial Carbon Management Strategy, and the UK's GGR business model are all candidates. None of them are sized to replace Microsoft today. Whether they scale up in time will determine which methods survive.

3. Method consolidation. If capital gets scarce, the methods with the lowest cost per tonne, the cleanest measurement story, and the strongest co-product economics will absorb what demand remains. That probably favors biochar, mineralization, and BECCS (bioenergy with carbon capture and storage) projects that already monetize energy or materials. It probably squeezes the most expensive direct air capture projects first.

The CDR thesis has not changed. The world still needs gigatonnes of removal to hit any credible climate target. What changed today is the assumption that one company would underwrite the early market while the rest of the buyer base caught up. That assumption is now retired. The sector has to grow up faster than it planned to.

Sources: Carbon Herald (April 11, 2026), and reactions on LinkedIn from Robert Höglund, Eve Tamme, Jason Grillo, and Ikarus Janzen.