What is Stripe Climate?

Stripe Climate is a Stripe program that lets businesses contribute a percentage of their revenue to frontier carbon removal companies. Stripe pools contributions from thousands of businesses and makes aggregated purchases from high-quality carbon removal suppliers — direct air capture, enhanced weathering, bio-oil sequestration, and ocean alkalinity enhancement. Every dollar is traceable and verifiable.

How much does Who's In contribute?

Who's In contributes 0.5% of platform revenue — meaning the 2.7% transaction fee on paid events and every Studio / Clubs / Conference subscription. It's not a cost passed to organisers; it comes out of our margin. As the platform grows, so does the contribution.

Which carbon removal technologies does this fund?

Stripe Climate funds a diversified portfolio: direct air capture (Climeworks, Heirloom), enhanced weathering (Lithos Carbon), bio-oil sequestration (Charm Industrial), ocean alkalinity enhancement (Planetary, Ebb Carbon), and mineralisation (44.01). These are permanent removal methods measured in thousands of years — not reforestation offsets that can burn down.

Why does an RSVP platform care about carbon?

Events have real emissions — venues, catering, guest travel. A typical 100-person in-person event emits 1–3 tonnes of CO2. At Who's In's scale, that adds up fast. We can't eliminate those emissions directly (the organiser controls the venue), but we can fund removal of a proportional amount at the platform level. It's the most honest pledge we can make today.

Can organisers opt out of the Stripe Climate contribution?

No — because organisers never pay it. It comes out of the Who's In margin, not the 2.7% fee. If we made it opt-in, nobody would opt in. Building it into the base rate means every event on the platform contributes automatically.

Every Gathering Has a Carbon Cost. Here's What We're Doing About It.

March 27, 2026 · By Craig Pollard

Every gathering has a carbon cost. Venues heated, lights on, guests commuting. You can't host an event with zero emissions today — but you can host one that funds the permanent removal of more carbon than it emits.

What we're doing

As of March 2026, Who's In contributes 0.5% of all platform revenue to Stripe Climate. Every 2.7% transaction fee on a paid event, every Studio / Clubs / Conference subscription — 0.5% of that amount goes directly to Stripe's pooled purchase of permanent carbon removal.

It doesn't come out of organiser fees. It comes out of our margin. As the platform grows, so does the contribution.

Why permanent removal, not offsets

There's a big difference between "carbon offsets" (avoided emissions, usually tree-planting) and "carbon removal" (pulling carbon out of the atmosphere and storing it somewhere it won't come back). Stripe Climate only funds the second category. The funded technologies include:

Direct air capture (Climeworks, Heirloom) — giant filters that pull CO2 from ambient air and mineralise it underground.
Enhanced weathering (Lithos Carbon) — speeding up natural rock weathering that permanently binds CO2 into bicarbonate.
Bio-oil sequestration (Charm Industrial) — converting plant waste into stable oil injected deep underground.
Ocean alkalinity enhancement (Planetary, Ebb Carbon) — adding safe minerals to seawater so it absorbs more atmospheric CO2.
Mineralisation (44.01) — turning captured CO2 into solid rock in geological formations.

These methods store carbon for thousands of years, not the decades a tree lives before burning down or being harvested.

What every Who's In event now does

When you create and run an event on Who's In — free or paid, 5 people or 500, yoga class or multi-day conference — a proportional contribution goes to Stripe Climate. You don't have to opt in. You don't have to configure anything. It just happens.

If you run a paid event with $1,000 in ticket sales, the platform collects $27 (2.7% fee) and $0.14 of that funds permanent CO2 removal. Across thousands of organisers, those small contributions pool into meaningful purchases.

How to verify this is real

Stripe Climate's suppliers publish their removals publicly. Stripe itself publishes annual contribution reports — anyone can inspect where the money went. Our contribution shows up in those aggregate reports as part of the pooled purchase. No greenwashing, no unverifiable claims.

Run your events on Who's In

Host free or paid events on Who's In Events — free forever, 2.7% flat on paid tickets. Manage your club on Clubs, your studio on Studio, or your conference on Conference. Every one of them contributes to permanent carbon removal — because the climate math of gatherings should work out in nature's favour, not against it.