Ecosia is a Berlin-based search engine that redirects ad revenue to large-scale tree planting and ecosystem restoration across 38 countries.
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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. Fees pay for the review, never the result. Last verified May 2026.
That places Ecosia 1st of 847 companies scored, and 1st of 76 in SaaS / Digital Services.
Ecosia is the highest-scoring saas / digital services company we've rated.
Among the 76 major saas / digital services brands we've scored, Ecosia sits 1st of 76.
Its three lowest-scoring questions, and what the evidence didn't show.
ClimatePartner-audited 102t CO₂ footprint in 2024, comparable to 2023 — stable at a negligible level, not a demonstrated year-on-year reduction.
Software-first business with no physical manufacturing.
No formal water reporting identified.
A score changes when the evidence does. We use new published evidence at the next rescore. Evidence that isn't public can count through an evidence review.
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Get in touch →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).
Ecosia leads its sector. These are the next 3 down.
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 →Adobe operates a low-carbon SaaS business with comprehensive emissions tracking and credible RE100 progress, but Scope 3 targets remain intensity-based rather than absolute.
See the breakdown →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.
See the breakdown →The formula and all 13 sources.
Same ten questions for every company. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × Scale13 sources used in this assessment. All publicly available. Each row shows which of the ten questions it informed.
“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.
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. The company planted 18.4 million trees in 2024 and owns solar generation assets producing 200% of its operational energy needs.
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