Independent sustainability scores from public evidence. The same ten questions for everyone, every source cited. Type a name — if we've scored them you'll see it, if not we'll add them to our scoring queue.
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699 companies scored · Recently: Visible Body, Aviva, Howden Joinery, T.REX ARMS
We score from public evidence — annual reports, filings, certifications, third-party investigations. That is the right starting point, because it is checkable and anyone can contest it. It has one real weakness: a company that does good work quietly scores below a company that does average work loudly.
Big companies have budget for polished sustainability reports. Smaller firms, family businesses and B-Corps often don't — even when the practice underneath is stronger. That gap is a reporting artefact, and it shows up in your score.
Nobody can pay us to change a number. A company can pay for a closer look at its evidence — that buys reviewer time, not an outcome. The score goes where the evidence goes, up or down, and we publish it either way.
Two ways to close it. One is free.
Think we've misread a source, or missed a public one? Submit it. We review every challenge, publish the outcome, and credit the correction. No payment, ever. This route exists so that no company has to pay us to be scored fairly.
Submit a challenge →For evidence that isn't public — energy bills, internal audits, supplier data, certifications. A reviewer reads everything, cross-references it against public data, and integrates qualifying material into your public score. Sources cited, changes logged.
Every assessment includes:
One-off. No subscription. Early-bird pricing to 30 September 2026.
For companies that use their score commercially — tenders, investor decks, customer pitches. Continuous monitoring against new public data, annual rescore, verified badge, embeddable widget, score-change alerts. £799/year or £75/month.
Yes. We integrate what the evidence shows, in both directions — a rating that only moves up isn't worth having, including to you. In practice companies submit evidence because their practice is ahead of their disclosure, so scores usually rise. Either way, you receive the written assessment note: exactly what we found, and what each question would need. You're paying for the review, not the result.
Because the payment buys reviewer time, not the number. The rubric is public. The same ten questions apply to everyone. Every change is logged publicly, and anyone can challenge it — for free. The free challenge route is the guarantee: no company ever has to pay to be scored fairly.
Possibly — but that's a disclosure gap, not a judgement on your practices. A 50-person manufacturer might have excellent environmental practices but score 25 because none of it is documented publicly. The evidence review exists for exactly this: submit your actual data and your score will reflect what you're really doing.
Free public scores join our scoring queue and are typically completed within 5 working days; we email you when your score is live. Evidence reviews are completed within 5 working days of us receiving your evidence.
Yes — every scored company on SINK shows the full 10-question breakdown with reasoning and sources. Browse the leaderboard, or type a company name above to find one.