Winnow Solutions sustainability score: 63/100
Exceptional starts at 75. The highest score on SINK is 71.
Winnow Solutions is a London-based SaaS and hardware provider that uses AI and scale-house cameras to measure and reduce food waste in commercial kitchens. Founded 2012, serving ~3,500 sites globally across hospitality, healthcare, and institutional foodservice.
More about Winnow Solutions
B Corporation certified.
Founded 2013Head office GBStaff ~173Revenue Not filed (total-exemption accounts, UK Companies House 08551367)Website ↗
Winnow is a food-waste-reduction SaaS company with genuine product-level impact: 28,000 tonnes of food waste prevented annually across 3,500+ client sites. Its own operational carbon footprint data is stale (last published FY20, 645 tCO₂e) and absent from recent reporting. No updated Scope 1, 2, or 3 emissions disclosed post-2022; hardware supply chain emissions likely grew with deployment scale.
Winnow Solutions scores 63/100 (Leading practice) on SINK's independent climate assessment, scored from public data only. Scores are free. Nobody can pay to change a score, speed it up or hide it. Last verified June 2026.
That places Winnow Solutions joint 4th of 1,023 companies scored, and 3rd of 69 in SaaS / Digital Services.
What is Winnow Solutions doing well, and where does it fall short?
Strongest on Controversies & Red Flags and Nature & Biodiversity Impact (8/10, 7/10). Weakest on Emissions Trajectory and Carbon Footprint: Operations (4/10, 5/10).
Where Winnow Solutions lost points
For each question that lost points, the evidence our public rubric looks for that we didn't find.
What would raise this score
- Whether its emissions are fallingShow a year-on-year fall in its total emissions.
- Emissions from its own operationsPublish full Scope 1 and 2 figures worked out to the GHG Protocol.
- Emissions from its supply chainMeasure most of its supply-chain (Scope 3) emissions.
Every question that lost points
- Emissions from its own operations5/10No full Scope 1 and 2 figures worked out to the GHG Protocol.
- Emissions from its supply chain5/10Most of its supply-chain (Scope 3) emissions aren't measured.
- Whether its emissions are falling4/10No evidence of a year-on-year fall in its total emissions.
- How clean its energy is5/10Less than half its energy shown to be renewable, or no transition plan.
- Its effect on nature7/10No verified restoration beyond its own footprint, or supply chain not mapped for nature risk.
- How it uses materials and handles waste7/10No verified figures for reuse and recycling across the business.
- Its effect on water6/10No water stewardship programme or verified fall in water use.
- Its climate targets6/10Its targets aren't validated by the Science Based Targets initiative.
- How openly it reports7/10No shareholder vote on climate, or not everything publicly verifiable.
A score changes when the evidence does. We use new published evidence at the next rescore. Anyone can send us new evidence, free. How to send it.
How is Winnow Solutions's SINK score calculated?
Same ten questions for every company. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × ScaleWhat evidence is Winnow Solutions's score based on?
12 sources used in this assessment. All publicly available. Each row shows which of the ten questions it informed.
33% of them were published by Winnow Solutions itself; the rest come from independent sources.
8 of 12 sources are independent of the company.
“Our Scope 1, 2 and 3 total emissions in FY20 were 645 tonnes.”
“At Winnow, we help the world's leading hospitality brands - including Hilton, Marriott, and IKEA - cut food waste in half”
“Based on the B Impact assessment, Winnow earned an overall score of 82.1.”
“we legally committed ourselves to a 'triple bottom line' approach in our articles of association”
“Winnow technology now serves more than 1,400 businesses across the world, saving the equivalent of 36 million meals each year”
“A key focus of transitioning to a circular economy involves moving to a regenerative agricultural system which builds natural capital, improving soils and biodiversity.”
“kitchens using Winnow are preventing the waste of 28,000 tonnes of food per year - equal to two meals saved every second.”
“When we reduce food loss and waste, we can mitigate the pressure on climate, water, and land resources”
“more than 20 million saved meals and 36,000 tonnes of CO2e that have been avoided”
“In 2023 Winnow partnered with UNEP and Hilton as part of the Green Breakfast initiative”
“companies like Leanpath, Winnow, and Kitro, which use real-time data and predictive analytics to monitor, categorize, and reduce food waste”
“As of Apr 30, 2026, the latest employee count at Winnow is 173.”
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How does Winnow Solutions compare with other saas / digital services companies?
Where Winnow Solutions sits among saas / digital services peers.
Among the 69 major saas / digital services brands we've scored, Winnow Solutions sits 3rd of 69.
Who scores higher in SaaS / Digital Services?
The 2 companies in the sector scoring nearest above Winnow Solutions.
Ecosia is structurally sound: a ClimatePartner-audited 102t operational footprint (stable, not yet on an evidenced reduction trajectory), 200% renewable energy ownership, and all profit reinvested into ecosystem restoration via binding steward-ownership.
See the breakdown →Sage has validated SBTi targets and transparent climate governance and FY25 emissions fell 13.4% to 27.8% below 2019, roughly on course for its 50% cut by 2030.
See the breakdown →Which companies moved this week, and why.
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