UK law firms told to prove authority for the AI era
TL;DR:
- New research ranks the 250 UK law firms most visible to AI engines like ChatGPT, Claude and Gemini.
- The average firm scored just 57 out of 100, with “authority signals” the weakest area sector-wide.
- Smaller regional and boutique firms often out-score large practices that read to AI as generic.
As clients increasingly ask AI chatbots for recommendations, most UK law firms are failing to send the signals those engines need to name them. That is the finding of the AI Reputation Index from Black Letter Communications and legal marketing platform Legmark, which analysed more than 5,300 firms and ranks the 250 most visible to AI — with magic circle giant Clifford Chance on top with a score of 94.
From SEO to GEO
The research frames a shift from search engine optimisation (SEO) to “generative engine optimisation” (GEO). Where a search engine returns links for a reader to choose from, a large language model reads the web, weighs it and hands back a single answer — so the goal is no longer ranking a page but shaping how the AI describes a firm. That requires corroborating evidence AI can cross-check: awards, accreditations, client reviews, directory entries and independent media coverage that all tell the same story.
The scores are sobering. The average firm managed 57 out of 100, and roughly two-thirds sat between 40 and 69 — a sector that, in the report’s words, “reads to AI as largely undifferentiated”. Authority signals were weakest across the board. Crucially, size was not decisive: well-regarded regional firms with strong reviews and sharp specialisms consistently out-scored larger practices that read as generic, from Cardiff’s Wendy Hopkins Family Law to a 22-person south Wales practice.
For UK professionals, it is a concrete instance of a broader shift Resultsense has followed — the same logic that saw London startup geoSurge raise £9.4m to shape how AI describes brands. It also sharpens the profession’s AI reckoning, coming days after a taskforce warned that not using AI could make lawyers negligent: firms now face pressure both to adopt AI internally and to be legible to it externally.
Looking forward
The report’s optimistic reading is that the playing field is level — AI “doesn’t care how big you are”, only how clearly and credibly a firm can be understood. For UK SMEs and boutiques across professional services, that is the wider lesson: as AI becomes the default first port of call, verifiable third-party authority is becoming the new front page of Google.