The Legal AI Index
A working competitor analysis of law firm AI strategies. Every UK Top 50 firm, the most active US firms, and a curated set of AI-native challengers: which platforms they have chosen, what they have built in house, who is leading the work, and where they sit in the Lawyer Innovation Map 2026.
UK · Tier 1 · Magic Circle and Top 10
10A&O Shearman
First mover. Harvey partnership evolved into co-development and revenue-sharing.
Clifford Chance
Microsoft-centric. Built proprietary GenAI tool on Azure OpenAI.
Linklaters
Heaviest proprietary build, combined with Legora as external GenAI platform.
Freshfields Bruckhaus Deringer
Multi-frontier-model strategy. Google Cloud/Gemini for infrastructure and Workspace, plus a multi-year co-development partnership with Anthropic.
Slaughter and May
Harvey firmwide (Apr 2026) plus continuing Luminance investor position. The last Magic Circle holdout has now picked an external legal AI platform.
HSF Kramer
Runs Legora and Harvey in parallel - one of very few firms to deploy both major legal AI platforms at the same time.
Ashurst
Harvey (first global firm to roll out day one) + Ashurst Advance.
Hogan Lovells
Built proprietary legal tech company (ELTEMATE).
Norton Rose Fulbright
Microsoft Copilot + Harvey [anecdotal] + NRF Transform consulting arm.
DLA Piper
Harvey at scale + proprietary tools. Chief Data and AI Officer appointed.
UK · Tier 2 · Large International / National
18CMS
Largest Harvey deployment in EMEA.
Eversheds Sutherland
Harvey as strategic GenAI partner, rolling out 2026.
Addleshaw Goddard
Hybrid build and buy - one of very few UK firms to build its own platform.
Pinsent Masons
Multi-vendor portfolio with client-facing AI products.
Clyde & Co
Luminance + proprietary Newton platform. Insurance claims automation.
Simmons & Simmons
Built proprietary Percy AI platform.
Travers Smith
Built and spun out independent AI company.
Macfarlanes
Harvey firm-wide + Amplify client-facing product.
Osborne Clarke
Bespoke client solutions via OC Solutions. No confirmed firm-wide GenAI platform. May 2026: first spin-out in OC's history — Justima, an AI-powered European regulatory monitoring platform.
Burges Salmon
Harvey + Copilot + Wexler with strong governance.
Stephenson Harwood
Three-part strategy - Harvey + WorkflowGPT + specialist tools.
Shoosmiths
Microsoft Copilot with £1M bonus incentive + client-facing AI Comply.
DAC Beachcroft
Insurance claims automation with specialist AI vendors.
TLT
Legora + client-facing diagnostic tools.
Mishcon de Reya
VC/incubation model + Legora.
Bird & Bird
Tactician category in Lawyer Innovation Map 2026. Close Legora co-development partner from early stage, plus internal AI Playground for lawyer-built tools.
BCLP
Operator category in Lawyer Innovation Map 2026. Branded LEAP programme is the firm's flagship for transforming legal practice and delivery.
Dentons
Operator category in Lawyer Innovation Map 2026. Federated structure: each region makes its own buy/build decisions. UKIME and Europe run distinct stacks.
UK · Tier 3 · Mid-Market and Specialist
14Kennedys
Proprietary Kennedys IQ platform + Spellbook training partnership.
Womble Bond Dickinson
CoCounsel (Thomson Reuters) - first UK firm to adopt firm-wide.
Irwin Mitchell
Lexis+ AI + Microsoft Copilot + internal chatbot.
Weightmans
Litera Kira + proprietary PREDiCT + government-funded AI research.
HFW (Holman Fenwick Willan)
No confirmed firmwide GenAI platform. First Head of Legal Technology Adoption appointed March 2026.
Taylor Wessing
Built LitiumTW (proprietary) + Legora.
Fieldfisher
AI hub and Director of AI appointed, but no specific GenAI platform publicly confirmed.
Browne Jacobson
Legora (firm-wide).
Mills & Reeve
No confirmed GenAI platform adoption found.
Trowers & Hamlins
Legora (97% pilot adoption).
Charles Russell Speechlys
Harvey (after rigorous multi-vendor bake-off).
Withers
Strategy and team-building phase. No confirmed platform.
Penningtons Manches Cooper
No confirmed GenAI platform. Legacy AI tools only.
RPC
Built proprietary AI assistant Porter.
UK · Tier 4 · Mid-Market, Regional and Specialist
12Gateley
No confirmed AI platform adoption found.
Gowling WLG
Harvey (Canada confirmed) + Kira Systems.
Lewis Silkin
Harvey firm-wide.
Freeths
Legora (core platform).
Hill Dickinson
No confirmed GenAI platform. 'Buy not build' stated. Managing uncontrolled usage.
Keoghs / Davies Group
Proprietary insurance claims technology. Chief AI Officer appointed.
Foot Anstey
Limited confirmed AI adoption.
Forsters
No confirmed AI platform adoption found.
Ward Hadaway
No confirmed AI platform adoption found.
Kingsley Napley
Built proprietary KNavigate platform on Kalisa rather than buying Harvey or Legora - explicitly cited cost as the deciding factor.
Brodies LLP
Scotland's largest firm by lawyer headcount. Jylo customer; published case study on Jylo's customers page.
Lawfront
PE-backed regional consolidator. Group-wide Jylo rollout (Sept 2025) covering all partner firms: Brachers, Farleys, Fisher Jones Greenwood, Nelsons, Slater Heelis, Trethowans. Cross-firm playbook sharing in the Jylo marketplace.
US firms
17Latham & Watkins
Harvey enterprise-wide. Second-largest US firm by revenue, signed enterprise license Aug 2025.
Paul Weiss
Harvey core design partner. First firm live with Workflow Builder, now evolved into Agent Builder.
White & Case
Build and buy. Atlas (proprietary, with Deloitte) plus Legora globally across 43 offices in 29 countries.
Baker McKenzie
'AI Creator' strategy since 2017. Proprietary tools via BakerML / Applied AI team. Legora deployed firmwide May 2026.
Wilson Sonsini
Proprietary Neuron platform with agentic AI. One of the first firms to bring agentic AI to clients.
Cooley
Build-first philosophy. Proprietary tools and a published AI Principles Manifesto.
Sullivan & Cromwell
AI advisory powerhouse. AIDA discovery tool plus a new Digital Infrastructure Practice Group.
Orrick
Hybrid build/buy. Distinctive incentive: billable-equivalent credit for AI learning time.
Goodwin Procter
Pushing to be 'AI-native': Legora deployed firmwide (Sept 2025). 90% adoption target across all employees by end-2026.
Ropes & Gray
Hired ex-Meta exec as the firm's first Chief AI Officer to set strategy and accelerate adoption.
Kirkland & Ellis
Quietly investing. Recognised in 'Best of the Best' for Generative AI; proprietary tools but few public details.
Kirkland & Ellis
Build, at scale. $500m to create a proprietary, firm-owned AI platform encoding the 'collective intelligence' of its lawyers, while retaining third-party licences alongside it.
Cravath
Public AI thought leadership; no confirmed firmwide platform announcement.
Davis Polk
AI advisory across the AI ecosystem; no public firmwide AI platform commitment.
Skadden
Cross-practice global AI team advising on AI matters; AI as legal subject rather than firmwide platform.
Mayer Brown
Multi-platform deployment (Harvey + Copilot) with a firmwide GenAI training curriculum rolling out across 1,800 lawyers globally.
Reed Smith
Innovation Lab + Gravity Stack subsidiary + evolving Harvey partnership. First Director of Applied AI appointed.
AI-Native firms
11Norm Law
Blackstone-backed, billed as 'the first AI-native full-service law firm for global institutional clients.' Lawyers trained as Legal Engineers convert workflows into LLM-driven AI agents.
Garfield.Law
First purely AI-based firm authorised by the SRA (May 2025). Small claims debt recovery up to £10,000 for SMEs. Per-document pricing from £2.
LawFairy
Second SRA-authorised technology-only law firm in England and Wales (Feb 2026). Deterministic rather than generative AI: FairyLogic encodes statutory criteria into structured decision pathways, producing auditable outputs without probabilistic LLM inference. Initial focus: UK immigration (55+ routes).
Crosby AI
Agentic AI-powered law firm combining custom software with in-house lawyers for contract review.
Eudia
AI-augmented law firm operating under Arizona's Alternative Business Structure programme. Non-lawyer ownership permitted.
Moritz
Hybrid AI-native law firm: AI drafts the first pass (80% of work), elite startup lawyers review, revise and answer questions (20%). Raised $9m seed from Y Combinator and 20VC in May 2026. Founded by ex-OpenAI counsel. Now operating in the UK and expanding across Europe.
Lawhive
AI-native consumer law firm. First AI company to acquire a traditional UK law firm.
Carta Law (fka Avantia Law)
Acquired by Carta (private capital ERP provider) in May 2026 and rebranded Carta Law. AI-first NewMod law firm serving private capital clients — asset managers, PE firms — via pay-as-you-go fixed-fee legal services embedded in Carta's fund operations platform.
General Legal
Y Combinator W26 batch. Transparent published pricing - $500 per contract for review and negotiation of 3-50 page contracts.
Keith
AI-native conveyancing firm. Authorised by the Council for Licensed Conveyancers (not SRA). Network of AI agents targeting 80% automation of residential conveyancing. Q3 2026 launch.
Manifest OS
AI-native business immigration platform operating through Manifest Law (ABS-licensed in Arizona). Raised $60m Series A at $750m valuation (April 2026). Planning England and Wales ABS licence.
The above is a curated subset. The full directory of AI-native law firms is maintained by Matt Pollins (Lupl) at aifirmindex.com - 40+ listings as of April 2026 and growing.