Mossy Earth sustainability score: 63/100
Exceptional starts at 75. The highest score on SINK is 71.
Limited independent evidence: only two independent sources cover this company. The score may change as more evidence appears.
Mossy Earth is a UK-based rewilding organisation founded in 2021 that funds and manages ecosystem restoration projects globally. It operates a membership model directing 80%+ of revenue to on-the-ground work: reforestation, riparian restoration, coral and kelp rehabilitation, and biodiversity monitoring across Europe, Southeast Asia, and Africa.
More about Mossy Earth
Approximately 20–25 staff, fully team-owned.
Founded 2021Head office London, United KingdomStaff ~20–25Revenue <£1M est.Website ↗
Mossy Earth is a small, bootstrapped rewilding platform with negligible operational emissions and a core mission delivering genuine biodiversity restoration across 500+ hectares. The critical weakness: no formal corporate emissions accounting or science-based reduction targets, though operational scale makes this less material than transparency and accountability gaps—no board governance, impact compensation links, or mission-lock structures.
Mossy Earth 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 May 2026.
That places Mossy Earth joint 4th of 1,023 companies scored, and 1st of 3 in Rewilding / Ecosystem Restoration.
Limited evidence. This score rests on 14 sources, 86% of them published by the company itself. Every source cited here passed the same quality checks as any other score: all live, none from data aggregators. There is simply less of it.
What is Mossy Earth doing well, and where does it fall short?
Strongest on Nature & Biodiversity Impact and Controversies & Red Flags (9/10, 8/10). Weakest on Carbon Footprint: Operations and Carbon Footprint: Supply Chain (3/10, 3/10).
Where Mossy Earth 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
- Emissions from its own operationsPublish emissions figures for its own operations, even an estimate from energy bills.
- Emissions from its supply chainAssess where its supply-chain emissions come from.
- Whether its emissions are fallingShow its emissions are falling, even from energy bills or mileage.
Every question that lost points
- Emissions from its own operations3/10No emissions figures for its own operations, not even an estimate from energy bills.
- Emissions from its supply chain3/10No assessment of where its supply-chain emissions come from.
- Whether its emissions are falling3/10No evidence its emissions are falling, not even from energy bills or mileage.
- How clean its energy is3/10No renewable energy tariff or major efficiency investment shown.
- Its effect on nature9/10No measurable net gain for nature.
- How it uses materials and handles waste5/10No measurable waste or recycling targets reported publicly.
- 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 annual impact report, or no pay linked to climate targets.
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 Mossy Earth's SINK score calculated?
Same ten questions for every company. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × ScaleHas Mossy Earth's score changed?
Mossy Earth's score has moved from 65 to 63 across 3 recorded reviews, down 2 points.
- 63 → 637 November 2026
Limited-evidence banner: 2 independent parties once company-published sources are not counted (owner ruling 2026-11-07). Score unchanged.
- 65 → 63-27 November 2026
Correction, 7 November 2026: removed an unsourced emissions figure. Score unchanged.
- Scored 658 February 2026
Initial score at platform launch
What evidence is Mossy Earth's score based on?
14 sources used in this assessment. All publicly available. Each row shows which of the ten questions it informed.
86% of them were published by Mossy Earth itself; the rest come from independent sources.
Limited data coverage. This assessment is based on 14 sources, 86% of which are self-reported by the company. Scores may change as independent evidence becomes available.
“Every quarter we provide a summary of our finances”
“As of Aug 31, 2024, the latest employee count at Mossy Earth is 8”
“80+% of the membership revenue goes directly on impact”
“Rewilding to us means restoring degraded ecosystems, enabling ecosystem processes and enhancing biodiversity”
“At Mossy Earth we are proudly bootstrapped and fiercely independent”
“Me and Matt started Mossy Earth with 300 euros and have taken our time to grow sustainably”
“Our team shares a passion for the outdoors and the preservation of our natural world”
“we have been awarded £544,558.76 of funding to plant 4.2 hectares of seagrass meadow”
“we do not issue carbon credits or use a carbon accreditation standard”
“This decision is driven by our commitment to reducing plastic waste”
“baseline assessments of native fish populations and riparian habitats”
“Every quarter, we publish a report to provide you with an overview of how our fundraising is coming along”
“we've joined the Global Rewilding Alliance, a movement dedicated to propelling rewilding into mainstream science”
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How does Mossy Earth compare with other rewilding / ecosystem restoration companies?
Mossy Earth is the highest-scoring rewilding / ecosystem restoration company we've rated.
Among the 3 major rewilding / ecosystem restoration brands we've scored, Mossy Earth sits 1st of 3.
Who comes next in Rewilding / Ecosystem Restoration?
Mossy Earth leads its sector. These are the next 2 down.
Ecosulis designs and delivers habitat restoration for clients across the UK.
See the breakdown →Nattergal operates rewilding sites across more than 1,000 hectares.
See the breakdown →Which companies moved this week, and why.
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