The app that reads your spending and hands back the one number you were never shown: the carbon behind the cart. Then it pays you to shrink it.
Somewhere right now, a person is standing in a checkout line, thumb hovering over a phone. They tap. A small screen tells them what the receipt never will - that this purchase weighs a few kilograms of carbon, that the secondhand jacket beside it would weigh almost none, and that choosing the lighter option just earned them points worth real money. The whole transaction takes four seconds. Multiply it by 450,000 people and you have Commons.
Commons is a climate fintech built on a stubborn, almost unfashionable idea: that ordinary spending decisions, the ones we make on autopilot, add up to something the planet can feel. Most climate tools traffic in guilt. Commons traffics in arithmetic - and then, cheekily, in rewards. It is the rare app that wants you to buy less and somehow makes that feel like winning.
Before Commons had a logo, it had a column header. Founder Sanchali Pal - Princeton economics, Harvard MBA, early career spent on development work in India and Ethiopia - spent six years logging her own carbon footprint by hand in a spreadsheet. It was tedious. It was also revealing: tracking the footprint let her trim her emissions by roughly 30% while saving around $2,000 a year. The lesson was not that she was virtuous. The lesson was that nobody else had the spreadsheet.
So she built one that didn't require a spreadsheet. The app launched in 2020 under the name Joro - after the Joro spider, a tidy metaphor for an invisible web connecting small actions. In 2023 it shed the arachnid and became Commons, a name that says the quiet part out loud: this is a shared resource, and the point is collective.
Tracked her carbon footprint in Excel for six years before deciding the rest of the world deserved a better tool. Princeton '12, Harvard MBA, formerly of Dalberg Global Development Advisors. Built Commons to turn private climate guilt into public, collective influence.
Connect your cards and Commons estimates the emissions behind every purchase, then charts your footprint over time. Free in the US and Canada.
Expert-verified sustainability scores for hundreds of brands - a built-in lie detector for greenwashing.
Earn points for thrifting, taking transit, or simply buying less. Redeem for gift cards or verified climate projects.
Monthly community challenges that gamify low-carbon habits and show your combined impact alongside everyone else's.
A subscription that funds verified offset projects to neutralize whatever footprint you can't yet shrink.
Commons has raised roughly $14M, capped by a $10M Series A on October 27, 2022. The cap table reads like a benefit concert lineup: Sequoia Capital and Amasia led, with Jay-Z's Arrive, Klarna co-founder Niklas Adalberth's Norrsken, Nest co-founder Matt Rogers' Incite, and Incubus' Mike Einziger along for the ride. Actress Maisie Williams and Fitbit founder James Park backed earlier rounds; civil rights activist Colin Kaepernick later joined the board.
Return to that person in the checkout line. A few years ago, the number on their receipt was the only number that existed - the price. The carbon was invisible, unpriced, somebody else's problem. Commons did a small, sneaky thing: it put a second number next to the first, and made it personal, and made it shareable, and then made it pay. The checkout line didn't change. The math behind it did.
That is the whole bet. Not that one shopper saves the planet at one register, but that 450,000 of them, nudged four seconds at a time, bend a curve that used to feel unbendable. A spreadsheet became an app became a movement. The cart is lighter now. So, a little, is the air.