Ecosia sustainability score: 71/100
Better than 100% of SaaS / Digital Services
Exceptional starts at 75. The highest score on SINK is 71.
Ecosia is a Berlin-based search engine that redirects ad revenue to large-scale tree planting and ecosystem restoration across 38 countries. Founded in 2009, it operates as a certified B Corp under steward ownership, structurally preventing profit extraction.
More about Ecosia
The company planted 18.4 million trees in 2024 and owns solar generation assets producing 200% of its operational energy needs.
Founded 2009Head office Berlin, GermanyStaff ~135 (2025)Revenue ~€35.8M (FY2022)Website ↗
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. Weaknesses are documentation gaps — no Scope 3 breakdown, AI energy unquantified, no TCFD/CSRD disclosure — and dependency on Microsoft Bing infrastructure it does not control.
Ecosia scores 71/100 (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 Ecosia 1st of 1,023 companies scored, and 1st of 69 in SaaS / Digital Services.
What is Ecosia doing well, and where does it fall short?
Strongest on Energy Source and Nature & Biodiversity Impact (9/10, 9/10). Weakest on Emissions Trajectory and Carbon Footprint: Supply Chain (4/10, 5/10).
Where Ecosia 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 supply chainMeasure most of its supply-chain (Scope 3) emissions.
- Its effect on waterRun a water stewardship programme or verify a fall in water use.
Every question that lost points
- Emissions from its own operations7/10Its own emissions aren't independently verified or tracked over several years.
- 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 is9/10Its own operations aren't shown to run on 100% renewable energy.
- Its effect on nature9/10No measurable net gain for nature.
- 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 targets8/10No validated long-term net zero target.
- How openly it reports9/10No 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 Ecosia's SINK score calculated?
Same ten questions for every company. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × ScaleHas Ecosia's score changed?
Ecosia's score has moved from 73 to 71 across 3 recorded reviews, down 2 points.
- 74 → 71-36 November 2026
Q3 stored as 7 in error; page and evidence show 4.
- 73 → 74+129 October 2026
Correction: score 71 → 74; performance 72 was not the sum of its ten published marks (75) (arithmetic error, corrected 29 October 2026).
- Scored 738 February 2026
Initial score at platform launch
What evidence is Ecosia's score based on?
13 sources used in this assessment. All publicly available. Each row shows which of the ten questions it informed.
60% of them were published by Ecosia itself; the rest come from independent sources.
“our own carbon footprint, which last year amounted to 102t CO2”
“The CO2 emissions are audited by ClimatePartner.”
“critics say Ecosia has not published granular, per-AI-query emissions numbers or full lifecycle accounting”
“we captured and prevented 2,700 times more CO2 than we emitted”
“Ecosia is not just producing enough solar energy to power all Ecosia searches with renewables – we are producing twice as much.”
“We planted 18.4 million trees together this year, protecting biodiversity in 38 different countries”
“In a joint venture with the green energy pioneer Naturstrom AG, we own and operate a 13MWp ground-mounted solar system”
“Ecosia GmbH earned an overall score of 106.9”
“In 2018, our founder Christian Kroll sold his shares to the Purpose Foundation, transforming Ecosia into a purpose-driven company”
“Ecosia had an Ethiscore of 11, in contrast to Google (5.5) and Microsoft Bing (6.5)”
“The Global Biodiversity Standard makes a landmark launch at CBD COP-16”
View →“Two of Ecosia's projects — SICIREC in Bolivia and the Jane Goodall Institute in Uganda — were the first ever projects to be certified under TGBS.”
View →“In April 2014 Ecosia becomes Germany's first certified Benefit Corporation”
View →If you believe a source has been misread or a newer version exists, submit a challenge.
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How does Ecosia compare with other saas / digital services companies?
Ecosia is the highest-scoring saas / digital services company we've rated.
Among the 69 major saas / digital services brands we've scored, Ecosia sits 1st of 69.
Who comes next in SaaS / Digital Services?
Ecosia leads its sector. These are the next 3 down.
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