About PSI UK

PSI UK compiles and maintains the PSI Index — a scored ranking of non GamStop casinos and betting sites not on GamStop, built on licensing verification, real payment testing, and support response times rather than commercial relationships.

Why We Built This

Most non GamStop casino comparison sites rank operators by affiliate relationship and present it as editorial judgement. We wanted a model where the score is calculated the same way for every casino, whether or not that casino has ever heard of us — licensing weight, tested withdrawal times, tested support response, and terms transparency, combined into one number that doesn't move based on commercial arrangements.

How We Test

Every casino not on GamStop in our index has had a real account opened, a real deposit made, and a real withdrawal requested and timed. We contact support directly with a realistic question and record actual response time. We verify every licence number against the issuing authority's own public register rather than accepting the casino's claim. None of this is outsourced to marketing copy — it's done directly, by us, against the same checklist every time.

What We Don't Do

We don't rank casinos by bonus size, and we don't accept payment for a higher position in the index — a casino's score is calculated from the same four components regardless of any commercial relationship. Where we do have affiliate relationships with listed casinos, that has no bearing on the score itself, only on which specific offer link a reader ends up using if they choose to sign up.

Who's Behind PSI UK

PSI UK's reviews are written and tested by Declan Marsh, who has spent over a decade researching offshore gambling licensing and player protection standards, with a specific focus on licensing verification and payment reliability testing rather than general casino reviewing.

Questions or Disputes

If you believe a casino's score doesn't reflect your own experience, or you've had a dispute with a casino listed in our index, see our dispute and complaints page — confirmed player disputes are factored into a casino's score at the next review cycle.